A.Shak Construction Chemicals offers a wide range of products:
- Bonding Agents - Chemical anchors
- Concrete bonding - Concrete crack repair
- Concrete release agents
- Concrete repair mortars
- Curing compounds
- Epoxy adhesives
- Epoxy grout
- Joint sealants
- Non-shrink grouts
- Precast repairs
- Waterproofing
Water infrastructure like reservoirs and treatment plants demand strength and durability from concrete. CHRYSO Southern Africa explains how admixtures enhance the performance of concrete in water-related applications – and make it last longer.
Concrete performance and durability underpin the value to society of water-retaining structures such as water treatment plants and storage reservoirs – and admixtures make all the difference.
Challenges, including cracking and permeability, can undermine the strength and longevity of these structures, according to Michelle Fick of CHRYSO Southern Africa’s Concrete Aesthetics Business Unit.
Admixtures such as plasticisers and super plasticisers are critical in ensuring workability of concrete, which is especially vital to heavily reinforced structures like reservoirs
chemical attack and corrosion of reinforcing steel.
There are also waterproofing agents, like pore blockers such as CHRYSO Fuge B that further enhance concrete’s resilience against chemical attack and reduce permeability, she adds.
cavities between the steel reinforcing, which is often extensive to ensure strength in these large water-related structures. Secondary reinforcing can be achieved through the application of macro-fibres and micro-fibres, which can reduce the amount of steel while also further reducing the risk of cracking.”
“Cracking of concrete, for instance, often calls for urgent and costly maintenance of water-related infrastructure,” says Fick. “In addition to leakage, cracks can undermine the strength of a structure due to corrosion of the steel reinforcing.”
She highlights the importance of reducing shrinkage in concrete to avoid cracking, using admixtures such as CHRYSO Serenis. By reducing the volume changes that occur during the curing process, this admixture helps to prevent cracking. It works by decreasing capillary tension, protecting concrete against moisture transmission,
Another waterproofing agent is crystalline admixture such as CHRYSO CWA 10. This reacts with moisture to form crystals deep within the pores and capillary tract of the concrete structure.
Admixtures such as plasticisers and super plasticisers are critical in ensuring workability of concrete, which is especially vital to heavily reinforced structures like reservoirs, adds Patrick Flannigan, technical manager of the Concrete Business Unit at CHRYSO Southern Africa.
“Water in the concrete mixture must be kept to a minimum to ensure strength and density, which could hamper its workability,” says Patrick. “However, admixtures allow the concrete to continue to flow into the
Another aspect of water-retaining structures to consider is their weight, so the ground underneath them must be well drained if they are to remain stable. To ensure water does not collect, a pervious base layer usually needs to be installed. This is constructed from no-fines concrete, which allows water to flow away without eroding the sub-base material.
He notes that an admixture like CHRYSO Easy Drain is ideal for no-fines concrete, as it coats the coarse aggregate to ensure a stronger bond between these particles and the cement-water mix.
Top Left: Plasticisers ensure optimal concrete workability, crucial for heavily reinforced structures like reservoirs. I Top Right: CHRYSO admixtures are ideal for no-fines concrete, ensuring water flows away while maintaining stability in large water-retaining structure. I Circle: Patrick Flannigan, technical manager of the Concrete Business Unit at CHRYSO Southern Africa.
South Africa’s top precast concrete producers are equal to the world’s best; a bold statement but true. The evidence for this observation can be seen in the much anticipated results of the Concrete Manufacturers Association’s Digital Awards for Excellence 2024 Competition, which are readily to hand in the winners book.
Open to all CMA members, this year’s competition attracted 34 entries including two international projects, and such was the overall quality of the submissions that each of the competition’s 15 entry categories attracted a winner.
“It’s not often that there is a winner in all entry categories,” said CMA general manager, Henry Cockcroft. “We have always operated on the basis of only conferring awards on merit, and if none of the entries in a particular category meet a standard worthy of an award, then no award is made.”
The competition is judged on the basis of product and application excellence in two groups, Aesthetic Excellence and Engineering Excellence; there are seven categories in the former and eight in the latter. Awards certificates are presented to all category winners and the four best
category winners are awarded a much coveted CMA Awards for Excellence trophy.
This year nine, as opposed to seven, Aesthetic Excellence certificates were awarded. The reason for this is there were two winners in the Cladding/Large Panels category and two in Beauty for Life category.
Similarly, eight Engineering Excellence awards were made, again because there were two winners in one of the Product Innovation categories.
“The fact that there were two winners in three of the entry categories, further serves to highlight the high standard of this year’s entries,” said Cockcroft.
The judging, which was based on video productions of all the entry projects, was an all-day affair held at the beautiful Catello di Monte Hotel in Pretoria. The judges included media specialist, Andrew Meyer, precast concrete specialist, Louis Orffer, and CSIR smart mobility expert, Dr Karien Venter.
Once the judges had finalised the category winners, the four trophy winners were chosen on the basis of the points they had
The competition is judged on the basis of product and application excellence in two groups,
Aesthetic Excellence and Engineering Excellence; there are seven categories in the former and eight in the latter.
accumulated in their respective categories. There was one Engineering Excellence trophy winner and three Aesthetic Excellence trophy winners.
Rocla earned the sole Engineering Excellence trophy for the supply of HDPElined steel-band jacking pipes which were used in the construction of a new bulk outfall sewer system in Montague Gardens, Cape Town. The pipes were designed in
accordance with very strict specifications for micro-tunnelling trenchless construction, a system which has gained world-wide traction for the installation of precast concrete sewer pipes in urban areas.
Revelstone, C.E.L. Paving Products and Cape Concrete Works were the Aesthetic Excellence trophy winners.
Revelstone, which also gained three Aesthetic Excellence awards, earned a trophy for supplying pavers for an extensive landscaping makeover at Erinvale Estate Hotel and Spa, a five-star sanctuary in Somerset West surrounded by the majestic Hottentots Holland Mountains. Entered in the Wet Cast Stone category, the project entailed replacing clay brick paving with cast-stone cobbles.
Approximately 3 500m² of Revelstone’s 50mm Kent Cobble and its Jura Cobble edging pavers were specified by the designer. The project was far from simple and the design and actual installation work required careful planning and detailing. The paving forms an intricate web of interlinked paths, tree and fountain circles which are interspersed among the estate’s extensive indigenous gardens and Cape Dutch architecture.
C.E.L. Paving Products won two Aesthetic Excellence certificates, one of which was in the Beauty for Life category from where it earned a trophy for supplying paving blocks for the High Constantia Retail Centre in Cape Town. The prestigious site is steeped in history and the design team wanted to ensure that the finished product harmonised with the surrounding landscape and its past.
C.E.L.’s coarse exposed aggregate paver was used to pave all the parking areas in a double mix concrete design which incorporates a dense cement-heavy 10mm topping. Ten years on, the paving’s beautiful aesthetic has withstood normal vehicular and heavy duty traffic and looks as good today as when it was first installed.
Cape Concrete Works won a certificate and a trophy in the Cladding/Large Panel category for the cladding of the new Investec building at Cape Town’s V&A Waterfront with large precast concrete panels. The building features 536 vertically installed panels in light and dark shades and in smooth and corrugated finishes.
Erected on the eastern and southern elevations, the precast concrete facades integrate seamlessly with the glazed facades on the western and northern elevations. The panels not only offer low maintenance but are designed to age gracefully, providing the building with an authentic aesthetic.
This year’s event was the CMA’s second digital competition. And as in 2022, videos were made of all entry submissions and were posted on YouTube and other social media platforms. They provided outstanding levels of focussed exposure in the lead up to the judging.
“Our digital reach at 124 600 was nothing short of epic,” said Cockcroft, “and our content interactions at 639 was a staggering 643% higher than in 2022. Our total watch time covered 21 days and 11 hours and our organic wow factor came in at 6 681, a jump of 54.8%.
“The fact that the entry videos achieved these remarkable results through our social media platforms, show that in addition to showcasing precast concrete, they contain information of real value to construction professionals. In fact the competition is more to do with gaining exceptional visibility for the multiple applications of precast concrete than winning an award. It’s about creating an informative resource for engineers, architects, property developers and other professionals, encouraging them to tap into the many advantages of precast concrete,” concluded Cockcroft.
tion for stage 4 Advanced Concrete Technology examinations
Module 4: Special concretes and techniques
will be assessed and commented on by a lecturer at SCT.
The Cement and Concrete School of Technology (CCST) is an important cog in the concrete industry’s development providing specialised courses designed to equip professionals with the skills and knowledge necessary to excel in the field.
Concrete’s properties are influenced by numerous factors, including mix design, curing conditions and the environment in which it is used. Without proper knowledge, mistakes in production or application can lead to costly failures, structural defects or safety risks. For anyone aspiring to enter
CCST’s programs cater to a wide range of professionals, from entry-level workers to seasoned engineers. Here’s an overview of the key courses:
Introduction to Concrete (SCT10)
Duration: 2 days
Who Should Attend: Entry-level construction workers, general labourers and new entrants.
Key Topics: Basics of cement and concrete, concrete mixing and curing, quality control and safety.
Concrete Practice (SCT20)
Duration: 4 days
Who Should Attend: Foremen, clerks-ofwork, technicians, supervisors, sales and technical staff.
Key Topics: Properties of concrete at all stages, mix proportions, production, curing, formwork, reinforcement, joints and repairs.
Courses are available throughout the year, both online and in person. For 2025, early enrolment is encouraged, as spots fill quickly. Participants can register on the CCST website and take advantage of discounts for bundled courses. Go to www.ccst.org.za
Module 5: Concrete sustainability, Statistics for concrete and Advanced Concrete Technology project
Delegates will be allowed to enroll in up to two modules at a time and will only be able to enrol in further modules on satisfactory completion of a module work-book.
Applications
Applications to do SCT 50 modules can be made at any time.
Entrance requirements
Pass in both the ICT Stage 2 (SCT 41) and Stage 3 (SCT 42) examinations.
No exceptions will be entertained.
Beyond technical expertise, CCST’s qualifications prepare professionals to meet industry standards and contribute to quality assurance. With increasing government oversight and the need for sustainable practices, skilled concrete technologists are in demand to optimise materials, reduce waste and ensure environmental compliance.
Learning objectives: Satifactory completion of the module work book will enable
The learning objectives can be downloaded from the ICT a delegate to proceed to the next module. website under the ‘qualifications’ button using the link below.
The only entrance requirement to be admitted onto the SCT 50 programme will be a pass in both the ICT stage 2 https://www.theict.org.uk/Qualifications.asp (SCT 41) and stage 3 (SCT 42) examinations. There will be no exceptions to this entrance requirement.
The moduralised self-study approach has been adopted to ensure a better quality of concrete technology education. It allows the delegate more time to study each topic in detail while reducing the impact on his or her work environment. It also allows for incremental payment. By paying per module no large upfront payment is needed.
The modules are divided under the following topics:
the building profession, a qualification in concrete and cement ensures technical competence and provides a competitive edge in the job market.
Module 1: Materials and mixes
Module 2: Concrete properties
Module 3: Concrete manufacture, site practices, quality control and non-destructive testing
The South African construction industry faces a significant skills gap, with a high demand for qualified technicians, supervisors and engineers. This makes formal training more critical and merges with programs offered by CCST to address this gap by providing hands-on and theoretical knowledge. This is designed to ensure participants are wellprepared to handle real-world challenges.
Batch Plant Management
Duration: Variable
Who Should Attend: Batchers, supervisors, laboratory staff and plant personnel.
Key Topics: Quality control, material properties, mix design basics and plant management.
Concrete Industrial Floors on the Ground (SCT21)
Duration: 1 day
Who Should Attend: Contractors and engineers specialising in industrial floors.
Key Topics: Floor design, subgrade preparation, joint detailing and curing techniques.
Concrete Road Design and Construction (SCT22)
Duration: 1 day
Who Should Attend: Civil engineers with road design experience.
The construction industry’s future depends on a workforce that values knowledge and innovation. By investing in a qualification from CCST, professionals can enhance their
Key Topics: Pavement types, mix designs and reinforcement.
Concrete Technology (SCT30)
Duration: 5 days
Who Should Attend: Engineers, technicians and technologists with prior experience.
Key Topics: Advanced concrete properties, specialised mix designs and architectural finishes.
Durability of Concrete (SCT37)
Duration: 1 day
Who Should Attend: Engineers and foremen involved in durable concrete production and placement.
Key Topics: Permeability testing, mechanical and chemical deterioration and durability techniques.
For more information visit: Go to www.ccst.org.za
Researchers from the University of Cambridge have developed a method to produce very low-emission concrete at scale – an innovation that could be transformative in the transition to net zero.
The method, which the researchers say is “an absolute miracle”, uses the electrically powered arc furnaces used for steel recycling to simultaneously recycle cement, the carbon-hungry component of concrete.
Concrete is the second-most-used material on the planet, after water, and is responsible for approximately 7.5% of total anthropogenic CO2 emissions. A scalable, cost-effective way of reducing concrete emissions while meeting global demand is one of the world’s biggest decarbonisation challenges.
A scalable, costeffective way of reducing concrete emissions while meeting global demand is one of the world’s biggest decarbonisation challenges.
The Cambridge researchers found that used cement is an effective substitute for lime flux, which is used in steel recycling to remove impurities and normally ends up
as a waste product known as slag. But by replacing lime with used cement, the end product is recycled cement that can be used to make new concrete.
The cement recycling method developed by the Cambridge researchers, reported in the journal Nature, does not add any significant costs to concrete or steel production and significantly reduces emissions from both concrete and steel, due to the reduced need for lime flux.
Recent tests carried out by the Materials Processing Institute, a partner in the project, showed that recycled cement can be produced at scale in an electric arc furnace (EAF), the first time this has been achieved. Eventually, this method could produce zero emission cement, if the EAF was powered by renewable energy.
BY LIONEL VAN TONDER, DIRECTOR, INGE SWANEPOEL, CONSULTANT, MARTIN VERSFELD, PARTNER, AND TYRON THEESSEN, PARTNER, WEBBER WENTZEL
We sought to unpack what the “construction mafia” actually is and observed that the term is a mischaracterisation of its nebulous nature.
The issue of extortionist rackets impacting construction projects has escalated to such a degree that Police Minister Senzo Mchunu has name-checked the construction mafia several times in public since his appointment in July 2024, making it a priority for the current administration.
Following the September 2023 article, clients have regularly asked us, “What can I proactively do to protect my business from the construction mafia?”. We have also been engaged by businesses that felt they had little choice but to accede to the construction mafia’s demands because the threat to bodily integrity and life, coupled with the cost of a work stoppage was too high. These businesses recognise the
The conundrum often faced by companies that win public tenders becomes quite apparent. They either have to withdraw their services, or they have to try and negotiate an outcome with these bad actors, which hopefully enables them to deliver the project on time, without risking the lives of their employees.
construction mafia for the blight they are and continue to seek ways to extricate themselves from their respective situations.
Ironically, it is well-intentioned legislation which has been hijacked by these bad actors.
The Preferential Procurement Policy Framework Act (PPPFA), which applies to public procurement, was designed to promote economic transformation by seeking to ensure that 30% of public procurement contracts (see Regulation 9) were allocated to specific previously disadvantaged groups to empower these
qualifying individuals, promote equity and drive socio-economic transformation.
While the objectives of the PPPFA are undeniably laudable, the construction mafia has sought to wilfully distort its objectives by demanding a 30% share of a project’s contract value. In our experience, the construction mafia has no regard for the distinction between private and public procurement, deliberately conflating the two to extend their reach into private sector developments. Considerations of extortion aside, the company that wins a tender also faces the added difficulty that Regulation 9 stipulates that the tenderer (to ensure that
the 30% allocation criteria is met) should select a supplier from a list of suppliers provided by the state-owned entity that issued the tender. Construction mafia groups are, unsurprisingly, not usually on any supplier list.
The conundrum often faced by companies that win public tenders becomes quite apparent. They either have to withdraw their services (which in most instances they can ill afford to do and which would entail them repudiating their contracts and in so doing also exposing them to a potential damages claim), or they have to try and negotiate an outcome with these bad actors, which hopefully enables them to deliver the project on time, without risking the lives of their employees. The challenge is that while the companies in question are victims of unlawful behaviour, they are in turn acting unlawfully by engaging with an unlisted supplier. In addition, if the state-owned entity or branch of Government discovers that a non-listed entity has been subcontracted, the winning bidders may run the risk of having their contract terminated and facing consequential damages claims.
The Prevention and Combatting of Corrupt Activities Act (PRECCA) complicates matters further because it provides that it is an offence for any person to accept gratification or bribe and to offer one. PRECCA also imposes a positive duty on any person in a position of authority to report corrupt acts (which is given a broad definition) where the monies involved exceed the sum of ZAR 100 000 (see section 34). Failure to do so gives rise to criminal liability, with penalties ranging from a fine to imprisonment of up to 10 years.
To aggravate matters, a company may also be exposed to an additional fine equal to five times the gratification or bribe which could prove ruinous. However, we see that coupled with the extortion, is a threat to the
project and persons should the bad actors’ conduct be reported.
The Financial Intelligence Centre Act (FICA) also places an obligation on “accountable institutions” or “Reporting institutions” to report suspicious transactions or activities to the Financial Intelligence Centre. Typically, Section 29 of FICA requires any person who carries on a business or who is in charge of, or manages a business, to report suspicious or unusual transactions to the Financial Intelligence Centre, if there is knowledge or suspicion that the transaction involves proceeds of unlawful activities, terrorist financing, circumventing a duty under FICA, or funds linked to the financing of terrorist or related activities.
While construction companies themselves may not always be explicitly designated as accountable institutions, they often engage in large-scale transactions and are sometimes exposed to potential misuse, such as extortion payments or “facilitation fees” that may be associated with organised crime (eg the construction mafia). These factors can lead to situations where they need to be vigilant for suspicious transactions, especially where there is a risk of money laundering or organised criminal activities.
Read part two in the next issue of Concrete Connect where we will unpack the legal recourse available to businesses and potential practical interventions, including working with law enforcement agencies and communities.
Textured precast concrete panelling has been used to dress the street-facing façade of new headquarter premises of fruit export company, Delecta Fruit (Pty) Ltd. Completed in March 2022 and fronting onto Paarl’s Main St, the 1 700m² building comprises two office floors and a parking basement.
Concrete Manufacturers Association member, Cape Concrete Works, produced 15 panels for the project. They were cast with granite aggregate and bush-hammered for a textured finish.
“Delecta decided on a textured precast concrete façade due to the manner in which this finish and a traditional lime-washed finish, as seen on the Cape Dutch buildings in the area, interact with sunlight,” said the building’s architect, Gideon Malherbe of Malherbe Rust Architects. “Moreover, the colour of the concrete and the aggregate were chosen on the basis of their similarity to Paarl Granite.
“The building is located on what was one of the last undeveloped plots along Main Road and the site falls within the Paarl Central Special Character Protected Area Overlay zone. This and the fact that some foundation walls of a building older than 60 years were visible above ground level, meant that the new structure’s design had be vetted by provincial and municipal heritage authorities. We were fortunate that the site falls toward
As part of our objective to break up the mass of the facade, the main set of panels appears to float across the upper-floor facade. This illusion is achieved through a ribbon of windows and aluminium cladding which runs below the main set of panels.
the back of the property and this enabled us to install basement parking and still maintain a small street-facing façade.
“As part of our objective to break up the mass of the facade, the main set of panels appears to float across the upper-floor facade. This illusion is achieved through a ribbon of windows and aluminium cladding which runs below the main set of panels. The wall below the ribbon window is covered in a thick plaster band detail which references the plaster work of some of the older buildings on Main Street.
“Cape Concrete’s dedication to the quality and consistency of the scabbled finish delivered a very pleasing result,” said Malherbe.
Eleven panels were installed on the topfloor façade and four were used to cover a two-sided section of the ground-floor façade. The upper-level panels span 5.3m
(height) by 2.6m (width) and are 115mm thick with a 300mm thickened beam section at the top of the panel. Abutting a 230mm brick wall, the panels provide an additional layer of thermal insulation for what is a westfacing elevation.
The ground floor panels measure 2.37m (height) and up to 5.37m (width) and cover three walls of a small annex adjacent to the entrance of the building.
Using steel shuttering, the casting was done horizontally on a tilt-up table which was adjusted to an 80º angle after 18 hours, by which time the panels had reached a strength of 20MPa. They were then lifted and stored vertically before being transported to site on A-shaped steel frames mounted on flat-bed trucks.
The support-beam section in the upper-level façade panels extend 185mm from the inner
panel face and provide an inverted ledge from which the panels were hung when lowered onto the supporting in-situ beam.
Galvanised steel brackets were used ensure that the panels were permanently affixed to the in-situ beam. The right-angled brackets were first attached to the panel support-beams with bolts threaded into fixing anchors, which Cape Concrete had cast into the beams. Then, once the panels were accurately aligned, holes were drilled into the in-situ beam and knock-in anchors, similar to rawl bolts, were hammered through the bracket bolt holes into the insitu beam and tightened with a spanner.
The panels were also secured at the bottom ends for added stability by galvanized angle brackets which were pre-fixed to the upperlevel floor deck and two galvanised steel pockets which were cast into the bottom of each panel. As the panels were lowered into position the galvanized angle brackets were slotted into the pockets and grouted after the alignment process had been completed.
The panels were cast with window sections as well as pockets for the attachment of timber-screened pergolas. The pergolas shade the west-facing windows from the direct sunlight during office hours. They were supported by steel I-beams, which were attached to the superstructure through panel pockets.
After being lowered into position, the ground-floor panels were temporarily supported by push-pull props while they were permanently secured to a steel I beam along the top ends with cast-in fixing anchors and galvanised steel pockets at the bottom ends.
Cape Concrete director, Johan Nel, said that some of the panels had to be cast with mitered ends for corner installations and that one of the panels was cast with an embedded Delecta logo which required the fabrication of special moulding.
“The project required great accuracy during casting to ensure the required level of precision in the installation of
the panels. Extensive planning had to be undertaken to make sure that the installation was trouble-free and the installers spent a day using as-build lines and levels to set out the placement of each panel. It enabled accurate first-time placements which only took small adjustments to achieve perfect alignments. This meant that instead of taking the planned two days to complete the installation it was done in one day,” concluded Nel.
Client: Delecta Fruit (Pty) Ltd
Architects: Malherbe Rust Architects
Developer: Beston Group
Consulting Engineers: Nortje & De Villiers
Consulting Engineers
Main Contractor: Isipani Construction
Quantity Surveyors: Best Africa Consulting
Precast Panel Supplier: Cape Concrete Works
Panel installers: PI
Wet-cast pavers are a popular choice for landscaping and pedestrian areas due to their striking aesthetic appeal and practical benefits. Manufactured by pouring a concrete mix into moulds and curing them in controlled environments, these pavers have unique advantages over other types of paving.
1. Design and Innovation: Wet-cast pavers come in a wide array of designs, textures and colours. Their production process allows for intricate detailing, making them ideal for creating visually appealing outdoor spaces. Patterns mimicking natural stone, brick or custom textures are often used to elevate the charm of walkways, patios and public areas.
2. Durability: Wet-cast pavers are highly durable thanks to the dense concrete mix and curing process. They can
withstand heavy foot traffic and are resistant to cracking and wear. This makes them suitable for both residential and commercial applications.
3. Colour Fastness: Wet-cast pavers maintain their vibrant colours over time. This is achieved through the integration of high-quality pigments and the protection offered by sealing products.
4. Ease of Maintenance: These pavers are relatively easy to clean and maintain. Sealing them further enhances their longevity by protecting against stains, moisture penetration and UV damage.
5. Versatility: Wet-cast pavers are used in diverse projects, including pool surrounds, garden pathways, courtyards and public pedestrian zones.
Some of the best-known producers include:
• SmartStone: Known for premium
quality and a variety of innovative designs for landscaping and architectural applications
• Revelstone: Specialises in handcrafted pavers with natural stone aesthetics
• WilsonStone: Offers a range of decorative concrete products, including elegant wet-cast pavers for both private and public spaces
• Creative Stone: Renowned for customisable pavers with high durability and aesthetic appeal
• Bosun: Provides high-performance paving solutions with an emphasis on strength and longevit
Whichever brand you choose, the use of quality wet-cast pavers are a reliable and visually stunning option. Their unique craftsmanship and long-lasting performance make them an investment that adds value and style to any project. Whether you’re building a tranquil garden path or a bustling pedestrian plaza, wet-cast pavers can bring any vision to life with unmatched durability and elegance.
In today’s construction industry, the twin imperatives of sustainability and efficiency are driving transformative innovations. One such advancement making waves is the use of fibre in concrete, replacing traditional steel reinforcement. This shift not only results in substantial time and labour savings leading to significant cost efficiencies, but also plays a pivotal role in reducing the carbon footprint associated with construction projects.
Steel reinforcement, while indispensable for its strength and durability, exacts a heavy toll on the environment. The production of steel involves substantial energy consumption and emits significant amounts of carbon dioxide (CO2). According to the World Steel Association, the steel industry accounts for approximately 8% of global CO2 emissions, making it a prominent contributor to climate change.
Michelle Fick, BU Development Manager: Concrete Aesthetics at CHRYSO Southern Africa, says that fibres, in contrast, are made from synthetic and natural materials and offer a far more sustainable alternative. Concrete containing fibres is thus easily recycled for reuse as crushed aggregates for other projects.
The environmental benefits of this shift are significant. The production of fibre materials, particularly synthetic ones, generates considerably less CO2 compared to steel production. Additionally, the energy requirements for manufacturing fibres are significantly lower.
“By substituting steel with fibres, construction companies can markedly decrease their carbon emissions,” Michelle says. “Further unlike steel reinforcement, which often involves cutting and fitting, leading to substantial scrap material which needs to be managed, our Advil fibres can be precisely mixed into concrete, minimising waste on construction sites. This reduction in waste contributes further to the sustainability credentials of fibrereinforced concrete.”
Beyond the environmental advantages, fibre reinforced concrete offers several practical benefits that enhance construction efficiency. Integrating fibres into concrete is straightforward and can be done during mixing, eliminating the labour-intensive steps of placing and tying steel reinforcement.
This streamlined process significantly accelerates construction timelines. The simplicity of using fibres reduces the need for specialised labour typically required for handling and installing steel reinforcement. This not only cuts down on labour costs but also mitigates the risk of on-site injuries associated with traditional steel handling.
Michelle says that while the initial cost of fibres may be close to that of traditional steel reinforcement, the overall savings in labour, time and reduced waste translate into lower total project costs over the lifecycle of the construction project.
Fibre-reinforced concrete has been successfully deployed in numerous projects globally as well as locally, highlighting both its practical and environmental benefits. Infrastructure projects like roadways and bridges have reported enhanced durability and reduced maintenance costs due to the use of fibres.
Moreover, residential and commercial buildings have benefited from faster construction times and improved structural performance, highlighting the versatility and effectiveness of fibre-reinforced concrete across diverse applications.
Available from CHRYSO, Adfil’s range of high quality fibre reinforcement solutions are designed to enhance the performance of concrete by improving its durability, reducing cracking and increasing its structural integrity. By integrating Adfil fibres into concrete, construction projects can achieve superior results while also benefiting from the environmental advantages of reduced carbon emissions and lower energy consumption.
Adfil offers a range of fibres tailored to various construction needs including macrosynthetic fibres, micro-synthetic fibres and steel fibres. These products are engineered to provide optimal reinforcement, ensuring
that concrete structures can withstand the demands of modern construction without the drawbacks associated with traditional steel reinforcement.
“We believe that the adoption of fibre in concrete represents a paradigm shift in the construction industry and offers contractors a sustainable and efficient alternative to traditional steel reinforcement,” Michelle says. “By reducing carbon emissions, minimising energy consumption and cutting down on waste, construction companies can significantly lessen their environmental impact while bolstering their operational efficiencies.”
“As the construction sector continues to prioritise sustainability, embracing innovative materials like fibre will be pivotal in fostering a greener future. These advancements not only align with global environmental goals but also position construction companies at the forefront of sustainable practices, driving both environmental stewardship and economic viability,” she concludes.
Top: Synthetic microfibre for concrete. I Left: Fibre in concrete is transforming the construction industry, providing contractors with a sustainable and efficient alternative to traditional steel reinforcement. I Below: Fibre-reinforced concrete minimises labour, time and waste, resulting in longterm savings for infrastructure projects.
AfriSam has introduced a product a premium readymix concrete solution that its says answers the need for high quality, reliable and efficient building materials.
The versatile Afrisam Starmix high performance readymix concrete combines the finest raw materials with advanced technology to ensure high quality and consistency. It is specifically formulated to meet the stringent demands of modern construction projects, offering durability, workability and strength.
One of the standout features of AfriSam Starmix is its exceptional workability. The mix is designed to flow easily and settle smoothly, making it ideal for a variety of applications. This improved workability also reduces the time and effort required for placement, ultimately speeding up the construction process.
AfriSam Starmix is engineered to provide outstanding durability and strength,
ensuring that structures built with this concrete can withstand the test of time and harsh environmental conditions.
Another key advantage of the concrete is its versatility. The product is highly adaptable and can be customised to meet specific project requirements. AfriSam is committed to sustainable practices and Starmix is no exception. The product is designed with environmental considerations in mind, incorporating eco-friendly materials and production methods that minimise the carbon footprint. This aligns with the company’s broader commitment to sustainability and responsible construction.
AfriSam not only provides a quality products but also offers exceptional customer support and service. The company’s team of experts is available to assist with mix design, technical advice and on-site support to ensure that every project runs smoothly and efficiently.
Pouring and curing a concrete slab is an intricate process that ensures the concrete’s strength, durability and most importantly its longevity. Whether crafting a floor for a room, an outdoor patio or a highuse parking area, the science of curing is important to achieve required strength and durability.
The following techniques focus on South African conditions and will assist contractors and DIY builders to be more successful. Firstly, it is important to note that the slab will require a proper subgrade preparation to ensure a stable foundation, reducing the likelihood of uneven settling. From the outset the concrete will also require a carefully calculated water-to-cement ratio to minimise shrinkage and for the builder will require striking a balance between workability and durability.
Concrete begins its transformation the moment water meets cement. This chemical reaction, known as hydration, triggers the growth of calcium silicate hydrate crystals, which bind the aggregates together. For this reaction to proceed effectively, the concrete must retain sufficient moisture and remain at a stable temperature. Without proper curing, these crystals don’t fully form, leading to weaker slabs prone to cracking and reduced durability.
Different types of slabs demand unique approaches. Housing floor slabs, for instance, typically require a 25-30 MPa mix, robust enough to support daily loads. Reinforcing these with steel mesh enhances their resilience. Outdoor patios, on the other hand, demand aesthetic finishes alongside moderate strength, making a 20-25 MPa mix with finer aggregates ideal. Parking areas, subjected to the stress of vehicle loads, call for a 30-40 MPa mix, often fortified with fibres or steel reinforcements to handle these challenges.
The South African climate also plays a crucial role in curing strategies. With temperature variations between regions, curing needs to adapt. High temperatures, common in the northern provinces, can accelerate hydration, risking early cracking. Cooling techniques, such as shading or applying wet burlap, help maintain an even curing process. Rainier coastal areas might require curing compounds to protect against excessive water infiltration.
The timeline of curing is as structured as the process itself. Within the first 24 hours, concrete develops sufficient strength to handle light traffic, though it remains fragile. By seven days, approximately 70% of the final strength is achieved, a testament to the importance of moisture retention during this critical period. After 28 days, the slab
reaches its full design strength, ready to support its intended loads.
During this time cracking is one of the greatest challenges in concrete slabs but can be mitigated by maintaining consistent moisture levels that prevent the slab from drying too quickly. Then use of expansion joints may be required to allow for natural movement caused by temperature changes.
To ensure a slab is not only functional but also long-lasting, consider these seven steps:
1. Design the Right Mix: Tailor the concrete mix to the slab’s purpose and load requirements.
2. Prepare the Subgrade: Compact and level the foundation to create a solid base.
3. Reinforce as Needed: Use mesh, rebar or fibres for added strength.
4. Pour and Consolidate: Distribute the mix evenly and eliminate air pockets.
5. Start Immediate Curing: Retain moisture within two hours using plastic sheeting or wet burlap.
6. Maintain Moisture: Spray water periodically or use curing compounds for at least seven days.
7. Monitor Progress: Inspect for early cracks and address them with controlled cuts or further curing.
Cutting through reinforced concrete requires a powerful concrete saw paired with quality blades that can provide clean cuts and last for extended periods without the need for constant replacement.
On modern sites workmen almost exclusively use diamond blades with superior hardness and durability. Diamond blades consist of a steel core with diamond segments bonded to the rim which allows them to efficiently cut through concrete and reinforcement. The trick is finding the right blades for different applications and brands that have better quality of diamonds and bonding methods.
Blades are categorised into wet or dry types, each suited for different cutting conditions. Wet blades use water to cool the blade and reduce dust, making them ideal for long, continuous cuts. Dry blades are better for
shorter, intermittent cuts where water may not be available.
In terms of cost, diamond blades range widely, with prices starting around a few hundred Rands for entry-level models and reaching several thousand rands for highquality, long-lasting blades. It’s crucial to balance cost with cutting requirements as highperformance blades can be more cost-effective in the long run, as they require less frequent replacement.
Concrete professionals and contractors usually source concrete saw blades from major retailers such as Builders Warehouse,
Coastal Hire and Concrete & Masonry Tool Suppliers. Leading international brands like Husqvarna, Norton and Makita are also readily available, ensuring contractors have access to reliable, high-performance blades suited for any project.
Small concrete mixers are indispensable tools for contractors and DIY builders in South Africa offering the ability to achieve the kind of consistency required for quality construction.
Small and medium sized concrete mixers fill the void between small shovel mixed concrete batches and the procurement of readymix concrete. When used right they have to significantly enhance concrete quality making them ideal for projects ranging from home renovations to small commercial builds.
Mixing concrete with a shovel, while traditional, presents several challenges. Achieving a uniform mixture of cement, sand, stone and water is difficult and can lead to weak spots and compromised durability. Hand mixing also requires considerable time and labour, increasing the risk of errors and inefficiencies.
Concrete mixers eliminate these problems by automating the mixing process. Their rotating drum ensures even distribution of all ingredients, resulting in a uniform and durable mix that stays fresher for longer. Other key benefits include:
When used right they have to significantly enhance concrete quality making them ideal for projects ranging from home renovations to small commercial builds.
1. Consistency: Mixers produce homogenous concrete, reducing the risk of weak areas in slabs and structures.
2. Time and Labour Savings: Mixing large volumes quickly reduces manual labour and project timelines.
3. Portability: Small mixers are easy to transport and ideal for various project sizes, from housing slabs to garden pathways.
4. Cost-Effectiveness: Minimised waste and better concrete quality translate into long-term savings.
South Africa boasts a wide range of suppliers offering concrete mixers for various needs. These include:
• Builders Warehouse: Known for affordable and versatile small mixers, with prices starting around R5,000 for entry-level electric units ideal for smaller projects.
• Makro: Offers compact and portable electric mixers for home use, often priced between R4,500 and R7,500.
• Adendorff Machinery Mart: Specialises in durable petrol and electric mixers with capacities ranging from 120 to 350 litres, perfect for medium-scale projects.
• Goscor Power Products: Provides robust 400-litre petrol and dieselpowered mixers, suited to heavy-duty tasks at construction sites
• Coastal Hire: A practical choice for renting mixers for short-term projects, ensuring affordability and quality.
• PPC and Afrisam Retailers: These cement suppliers often stock basic mixers at their outlets, focusing on pairing mixers with high-quality cement for best results.
Small electric mixers start R4,500 for 120- to 150-litre capacity, ideal for DIY tasks. Mid-range mixers are mainly petrolpowered units with capacities of 250 litres cost between R 12,000 and R 18,000.
Large Mixers are mainly diesel-powered, 400-litre models suitable for large-scale operations and are priced around R 20,000 to R 25,000.
Investing in a small concrete mixer can speed up the way contractors and builders handle their projects. Beyond saving time and labour, mixers ensure superior concrete quality which is critical for structural integrity and durability. The uniform mix achieved by a rotating drum is far superior to what can be achieved with hand mixing.
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The automotive business council, NAAMSA, recently released the 2023 new vehicle statistics and for the fourth consecutive year, Mercedes-Benz Trucks claimed the market leader position for heavy commercial vehicles reaffirming why the Mercedes-Benz Actros won the NAAMSA Extra-Heavy Commercial Vehicle of the Year award in 2023.
The Arocs range for construction and distribution, significantly grew its unit sales in 2023 compared to the previous year. This indicates that the construction industry is regaining momentum and that the Arocs, focussing on reduced maintenance cost for customers, is a force to be reckoned with.
“In a market where customers are spoiled with choice, we are beyond grateful for our customers that trust Mercedes-Benz Trucks to support their business. We thank you for your business. In addition, I would like to commend our dealers and general distributors for their ongoing efforts to support our customers across our entire value chain. We are positive that the heavy commercial vehicle market will remain strong and look forward to further serving our customers in 2024.” Maretha Gerber, vice president sales and marketing, Daimler Truck Southern Africa.
In addition, Daimler Truck Southern Africa (DTSA) and its brands Mercedes-Benz Trucks, FUSO Trucks and Mercedes-Benz Buses remains the largest commercial vehicle seller in South Africa, ranking number 1 in the Top 15, according to NAAMSA’s Industry New Vehicle Sales Report, December 2023.
Powerstar Jetpark recently hosted the highly anticipated Shantui Welcome Day at their Jetpark branch.
The event brought together industry professionals, clients, and enthusiasts to witness the latest in construction machinery technology. It was a day filled with excitement and innovation as Powerstar showcased the full range of Shantui models, including the newest launches that are set to make waves in the construction industry.
Guests were treated to live demonstrations, giving them a firsthand look at the cuttingedge features and robust performance that define Shantui equipment. From bulldozers to wheel loaders, every model on display highlighted Shantui’s commitment to reliability, durability, and efficiency.
A standout moment of the day was the unveiling of the new Shantui models, designed to meet the growing demands of the modern construction landscape.
These machines offer superior functionality and enhanced productivity, making them invaluable assets for any construction project.
The event also marked a special occasion for WNR who made a significant addition to their fleet by purchasing a Shantui SE215W Excavator. “We extend our heartfelt congratulations to WNR for their purchase and
are confident that the SE215W will serve them well, delivering exceptional performance and reliability on every job site.”
The Shantui Welcome Day gave a look at Shantui’s innovative machinery and was a testament to the strong partnerships and commitment to excellence that Powerstar Jetpark continues to uphold.
Left: Repaired rocker arms and a deformed rocker bush that subjected to just one heavy compression. In reality polyurethane bushes need to withstand millions of compression cycles to give a lifespan of tens of thousands of kilometres rather than just a few kilometres achieved by fakes.
the various material types and who let cheap pricing be their guide. But the materials used in the inferior items lack memory, load bearing capabilities, cut and tear and other properties essential for proper performance.
By comparison, original Polyflex bushes were tested on the harshest of conditions by South Africa’s largest trailer manufacturer and with many millions of bushes successfully supplied
A surge in counterfeit rocker, equaliser and radius or torque arm bushes in South Africa is posing a significant threat to construction and heavy-duty trucks as fake parts can lead to catastrophic suspension failures and even road accidents.
Rob Russell, managing director of local polyurethane processor Polyflex Urethanes, the originator of the Polyurethane suspension bushes, has warned truckers saying the flood of fake components are often marketed as durable polyurethane products at a cost that is usually far below the market price.
“In recent times it seems the strong demand for polyurethane bushes has caught the attention of syndicates who have begun flooding the market with counterfeit or similar-looking inferior products. In the worst of these instances what we are seeing is not polyurethane at all. It is plasticised PVC which looks similar to genuine polyurethane bushes but lacks the key properties required for dynamic applications required from truck suspensions.
“PVC is fine for gum boots or certain static applications, such as plumbing or electrical components, but it’s not designed to withstand the stresses of mechanical suspension systems.
Failed bushes result in the following:
1. Accelerated tyre wear due to the resultant misalignment that occurs 2. This misalignment contributes to increased rolling resistance that not only rapidly wears the tyres but also contributed to increased fuel consumption
3. Damages to the suspension which can result in the need to replace the rocker pins, rocker boxes, springs and even repairs to the chassis.
This can cripple a truck and lead to significant costs to salvage the cargo and repair the damage which could be anywhere along the roadside in South Africa or across the borders where salvage may be near impossible.
The managing director of Rig-A-Line, a leading truck align specialists, Sergio Moreira is regularly having to carry out unnecessary and costly repairs to trailers owing to operators falling victim to these inferior bushes. With the cheap products looking so similar to the genuine items, it can be very deceiving especially to those untrained in
to the market over the past 30 years, there are no better bushes to protect your trailers,” says Rob.
Polyflex advises consumers and distributors to source bushes only from trusted suppliers to avoid counterfeit products.
Polyflex and its distributors were aware of significant movement of stock of counterfeit bushings that were sold to unsuspecting buyers in their quest for bargains during this time. With considerable amounts of money invested in stock of these counterfeits it was suspected that unscrupulous suppliers began dumping the stock before consumers wise up to the scam. We hope you didn’t get caught out!
Maximising the longevity of engines in trucks and earthmoving machines is a critical concern in heavy-duty industries such as construction and logistics. These engines endure intense workloads and extreme operating conditions, making the choice of high-quality diesel and lubricants essential. Clean fuel and advanced lubricants work together to enhance engine performance, reduce wear and ensure operational reliability over extended periods.
In South Africa, diesel is available in several grades, primarily distinguished by sulphur content. Traditional 500 ppm diesel, though still in use for older engines, is being gradually replaced by cleaner options such as 50 ppm and 10 ppm diesel. These low-sulphur and ultra-low-sulphur fuels are designed to meet the demands of modern engines equipped with advanced emissions systems.
Maintaining the purity of diesel is paramount. Contaminants such as water, dirt and microbial growth can wreak havoc on engine components, causing injector clogs, corrosion and degraded performance. Proper storage in sealed containers, coupled with high-efficiency filtration systems and regular tank cleaning, ensures that diesel remains free from impurities and safeguarding engine functionality.
To enhance the eco-friendliness of diesel engines, various strategies are being employed. The use of ultra-low-sulphur diesel significantly reduces sulphur oxide emissions, while biodiesel blends, derived from
renewable sources, offer a biodegradable option that lowers greenhouse gas emissions. Optimising engine performance through regular maintenance and the use of cleanerburning fuels also plays a pivotal role in minimising environmental impact.
Equally important to engine health is the use of high-quality lubricants. These include engine oils, gearbox oils and greases, which reduce friction, dissipate heat and protect against wear. Advances in lubricant technology have introduced synthetic oils that outperform traditional mineral-based oils in several key areas. Synthetic oils, engineered from chemically modified compounds offer superior thermal stability, lower volatility and enhanced performance under extreme conditions. Additive packages and emerging technologies like nano-lubricants further enhance friction reduction, wear protection and overall efficiency.
The choice between mineral and synthetic oils often depends on the specific needs of the machinery. While mineral oils derived from crude oil are more cost-effective
upfront, synthetic oils provide longterm benefits such as extended service intervals and better performance in hightemperature and high-load environments. These advantages make synthetic oils particularly well-suited for the demands of heavy-duty machines.
Grease plays a vital role in the maintenance of moving parts, particularly where components connect to the chassis or drivetrain. By forming a protective barrier against dirt, water and corrosion, grease ensures smooth operation and reduces wear on critical parts such as pins, bushings, universal joints and wheel bearings. Choosing the right type of grease, whether for high-temperature, waterresistant or general-purpose applications, further enhances its effectiveness.
On construction sites, maintaining cleanliness in fuel and lubricant handling is challenging but essential. Dedicated decanting equipment, clean storage practices and regular filtering of fluids help prevent contamination. Greasing points must be wiped clean before application to avoid introducing dirt into moving parts, ensuring optimal lubrication and protection.
The use of clean, high-quality diesel and advanced lubricants is not merely a maintenance strategy but a means of reaching more sustainability in heavy-duty industries. This means operators can extend engine life, reduce maintenance costs and contribute to more environmentally friendly operations. These measures ensure the reliability of trucks and earthmoving machines and support broader industry goals of efficiency and sustainability.
In the construction industry powerful new mini excavators from Kubota are proving that bigger is not always better in the construction industry where its smaller size and manageability is proving to be a game changer.
Contractors are finding that the powerpacked Kubota excavators can do anything their larger competitors can do on site and a whole lot more, such as working in confined spaces, traversing paved areas without damaging infrastructure and being able to be transported on a small drop side truck or even a bakkie in the case of the smallest models.
The ever-versatile TLB cannot nearly match the productivity of the Kubota excavators in applications like trenching, demolition and digging where the excavators not only out-perform them by a wide margin, but also cost approximately 70% less to operate depending on the machines used.
According to Dennis van der Merwe of Smith Power Equipment, the sole distributors of Kubota equipment in southern Africa, Kubota excavators are rapidly growing in popularity as a robust and versatile choice for South Africa’s construction industry. The Japanese
Kubota excavators are rapidly growing in popularity as a robust and versatile choice for South Africa’s construction industry.
equipment giant’s product lineup currently extends from 1.7 ton up to 8-ton models with a wide range of integrating aftermarket attachments like jackhammers and augers to adapt the excavators for specific tasks.
“Kubota’s excavator market has grown substantially in South Africa and we have more than doubled our sales from 2023 to 2024. The latest projections for 2025 indicated similar growth of an additional 30-35% growth. This expansion reflects our strength in the mini and midi excavator segments, where we command approximately a quarter of the market share in an annual market of around 360-400 units in South Africa.
“We have found that small to mediumsized civil engineering firms are using our Kubota excavators on work such as road rehabilitation and foundational work on large sites. They are also finding an important niche in urban areas where manoeuvrability and compactness are essential. In these instances our excavators in the 3-to-8-ton class are chosen for their ability to access tight spaces and avoid the need for heavy transport vehicles. The front blade is also a useful tool in these applications to establish a grade and for site clearing.
“Bearing in mind that a Kubota excavator can achieve nearly twice the productivity rate of a comparable TLB and by comparison cost a fraction of the price of a full-size excavator, this translates to a faster ROI due to shorter work cycles and increased task efficiency,” says Dennis.
He adds that the Kubota excavators are also popular in the rental industry where companies like Talisman includes Kubota excavators as part of their rental fleets. The company’s branches across South Africa have steadily incorporated Kubota’s small excavators into their lineup, attracted by
the machines’ durability and low cost of ownership.
For users the advantage of choosing a Kubota excavator is the vast Smith Power Equipment dealer network that covers every corner of the country wherever construction, farming or general industry is present. With servicing, spares and parts available in or near most towns in the country users are assured of the highest levels of aftermarket support for the machines. Added to this is the legendary reliability of Kubota machines which is unsurpassed in the construction industry.
Dennis concludes that Kubota’s presence in the South African market is set to grow as infrastructure development projects get underway and expresses his optimism that pending government and private-sector projects will drive further demand for compact and versatile machinery. Kubota’s excavators are well-positioned to support this growth, providing efficient solutions for large and small projects alike.
KUBOTA U15-3
The 1.7-ton excavator has a 9.9KW low noise, low vibration engine and exceptional fuel efficiency. Choice of rubber track and ability to reduce width from 1240mm to just 990mm in tight spaces.
Max. bucket breakout force:
15.2kN(1545kgf)
Max. digging depth: 2310mm
Max. digging radius: 3900mm
Max. digging height: 3540mm
Three-ton excavator with 20.5KW engine compact size and zero-tail swing which keeps the tail of the mini excavator within track-width when swivelling, enabling operation in tight and confined spaces.
Max. bucket breakout force:
30.0kN(3059kgf)
Max. digging depth: 2820mm
Max. digging radius: 4905mm
Max. digging height: 4250mm
Highly productive excavator with four simultaneous operations the bucket, boom, arm and swing can be operated simultaneously on this 5-ton excavator with 28.5KW allows faster operation in all conditions.
Max. bucket breakout force:
36.5kN(3720kgf)
Max. digging depth: 3560mm
Max. digging radius: 5995mm
Max. digging height: 5630mm
Exceptional power in a compact package with 49.7KW engine makes it unbeatable when trenching through compacted soil. With the KX080-3S, elevated productivity levels are certain with 3,880 kg arm forces.
Max. bucket breakout force: 65.2kN
Max. digging depth: 4600mm
Max. digging radius: 7330mm
Max. digging height: 7300mm
Seeing firsthand how productive and reliable the Kubota excavators that he sells are - has led Herman Meyer, owner of Eastern Cape Kubota dealership, Nels Distributors, to purchase several machines for his own family-run plant hire operation.
After several months in service the two Kubota U50-5 are proving to be worth every cent and are the most hired machines in his fleet.
“My customers often come to me because they’ve seen these machines in action and want to either buy or to rent. They know the performance and reliability they’re getting, which leads them to return for more,” says Herman.
With a growing rental demand Herman has noted an increasing preference for his mini excavators over larger machines, particularly in sizes like the 1.7 and 5-ton models. From construction sites to grave digging, these machines offer an impressive range of applications with many aftermarket attachments like jackhammers and augers available to adapt the excavators for specific tasks.
Compared to traditional TLBs the mini excavators offer several operational benefits for the hire market. They are significantly more fuel-efficient in similar tasks and quicker. This efficiency is partly due to Kubota’s dual-pump hydraulic system, which allocates separate flows for steering and digging power, enabling smooth, uninterrupted operation. Additionally, the excavators can perform at lower idle speeds without compromising power, adding to fuel savings and reducing operational noise a valuable asset on job sites with noise restrictions.
He says that the main areas of operation are in construction and concrete batching but that there is rising demand in landscaping and industrial applications. The machines have also found applications in unique settings, such as site clearing, cleaning chemical storage facility walls, grave digging and foundations.
Following worrying discrepancies in the monitoring of production output, sales and inventory, a belt scale from Tru-Trac is winning the day for KwaZuluNatal-based AfriSam Coedmore Quarry. With groundbreaking static calibration accuracy error levels as low as 0,06%, the belt scale provides reliable data for sound decision-making.
Over the years, AfriSam Coedmore Quarry has had issues with stock capturing and evaluation. “Accurately measuring production, sales and stock levels is critical for effective management and efficient operations,” says Lloyd Maringa, works manager at AfriSam Coedmore Quarry.
With groundbreaking static calibration accuracy error levels as low as 0,06%, the belt scale provides reliable data for sound decision-making.
“Traditionally, we conduct quarterly stockpile surveys though an independent third-party to gauge the levels of stock on the ground. It was during these surveys that we would always encounter huge discrepancies between what we had produced, what would have been sold and what should have been on the floor.”
In some instances, the variations were
as high as 70 000 tonnes (t). In the quest to resolve the problem, the operation resorted to monthly surveys instead of the usual quarterly routines. The more frequent surveys, however, did not yield different results. Further investigations eventually pinpointed issues with the existing belt scale between the intermediate stockpile and the secondary crusher. Despite several interventions, including regular
With a proven accuracy margin under 0,1%, the belt scale sets industry standards in metallurgical accounting.
calibrations by the supplier and even the installation of a second belt scale, the challenge persisted.
“We therefore went into the market for a new belt scale supplier,” explains Dustin Naidoo, maintenance superintendent at AfriSam Coedmore Quarry. “Tru-Trac proposed a proof-of-concept approach, whereby they installed a belt scale on a trial basis for a month. Upon evaluation of the results, we were impressed by the high levels of accuracy.”
Since the installation of the Tru-Trac belt scale, the stock management and evaluation problems are a thing of the past. “We have now reverted to the usual quarterly stockpile surveys, which saves us both time and money,” says Lloyd.
Tru-Trac’s flagship TTR FI-4 belt scale system installed at AfriSam Coedmore uses a fully floating pivotless weigh frame supported by four load cells, making it ideal for high-precision applications. It is a simple and extremely accurate system engineered to produce precise data. With a proven accuracy margin under 0,1%, the belt scale sets industry standards in metallurgical accounting.
“In addition to the accuracy of the technology, we are equally impressed by the service provided by Tru-Trac. Although they taught us to do in-house calibrations, a technician visits our site every month. Choosing Tru-Trac has proven to be one of the best business decisions we have made in recent times,” concludes Naidoo.
Above:
Concrete pumps have transformed construction projects, enabling the efficient transportation of concrete over long distances, through challenging terrain, and to elevated locations. From urban skyscrapers to remote infrastructure developments, these machines ensure consistent and timely concrete delivery. This article delves into the evolution of concrete pumping, the world’s leading and emerging manufacturers, and the importance of concrete consistency in ensuring pumping success and ultimate strength.
The success of any concrete pumping operation hinges on the consistency of the concrete mix. The mix’s workability, typically measured using a slump test, determines how easily it flows through pipelines.
1. Slump Range: The ideal slump for pumping is usually between 50- and 150-mm.
Stiff mixes can cause blockages, while overly wet concrete may lead to aggregate segregation which may compromise the final strength.
2. Aggregate Size: The maximum aggregate size should not exceed 2530% of the pipeline diameter to prevent
blockages. Rounded aggregates are preferred over angular ones to reduce friction and improve flow.
3. Admixtures: Plasticisers and superplasticisers enhance workability without increasing the water content. This maintains concrete flow while preserving the strength of the hardened structure.
The pumping process must maintain the homogeneity of the concrete mix. Excessive pressure or improper handling can lead to segregation of materials, reducing the structural integrity of the final product. Adhering to best practices in pumping operations and ensuring proper mix design are crucial for delivering durable and robust concrete.
Concrete pumps have become indispensable in modern construction, offering unmatched efficiency in delivering concrete over vast distances. The success of concrete pumping, however, is not solely reliant on the machinery. The consistency and quality of the concrete mix play a critical role in ensuring pumping efficiency and longterm structural strength. By combining
advanced equipment with well-designed concrete mixes, South African contractors can achieve operational excellence.
Several global manufacturers dominate the concrete pump industry, renowned for their reliability, innovation, and performance.
Schwing-Stetter
A leader in concrete pump technology, Schwing-Stetter produces robust and versatile equipment. Their truck-mounted pumps feature advanced hydraulic systems and wear- resistant parts, making them ideal for high-pressure, long-distance pumping.
Putzmeister
Known for breaking records in longdistance and high-rise concrete pumping, Putzmeister’s equipment has been used in iconic projects such as Dubai’s Burj Khalifa. Their smart pumping systems deliver great precision and efficiency.
CIFA combines European craftsmanship with advanced engineering. Their lightweight truck-mounted pumps are highly sought after for their efficiency across diverse construction applications.
Chinese manufacturers are rapidly gaining traction in the global market, offering costeffective solutions without compromising on quality.
SANY is one of the world’s largest equipment manufacturers, producing a wide range of concrete pumps, including some of the biggest truck-mounted boom pumps. Their machines are equipped with intelligent control systems for improved efficiency and reliability.
Zoomlion
Known for its commitment to innovation, Zoomlion designs pumps that deliver outstanding durability and performance. The company’s models are increasingly popular in international markets, competing directly with established European brands.
XCMG
XCMG is another fast-growing player, offering a variety of concrete pumps tailored to diverse construction needs. Their ecofriendly designs align with global trends towards sustainability.
Construction machines have a tough job. Adverse environments and weather conditions can lead to corrosion. Dirt and lubricant in heavily loaded bearing points increase maintenance frequency.
Do away with additional lubricants now and use maintenance-free, lubricationfree igus® tribo-polymer plain bearings. Predictable service life and high load capacity increase reliability, reduce maintenance, and make operations easier to plan. Available directly from stock.
Mitsubishi Motors South Africa (MMSA) recently announced the arrival of its Next-Gen Triton, an evolution in the iconic bakkie’s 46-year legacy. Building on a history of toughness, reliability and adventure, the new Triton is designed to challenge expectations in the South African market by offering a bakkie that is tough, stylish and versatile enough to meet the demands of concrete professionals and contractors.
This follows hot on the heels of the newly launched GWM P500 that recently took the honours at this year’s 2024 South African Bakkie of the Year (SABOTY) competition. The victory also marks the first time a hybrid vehicle has claimed this honour and the first win for a Chinese manufacturer in this highly competitive arena. The P500 HEV not only excelled in the extensive evaluation process but also claimed the throne from several dominant and established brands in the bakkie segment.
Unlike GWM’s P-Series, the Mitsubishi’s Triton has long been a favourite among South African drivers with a reputation built on the brand’s heritage and the success of the iconic Colt. Since then, the Triton has continued to grow and evolve, offering a balance of rugged performance, cuttingedge design and modern technology.
“The South African bakkie market is an extremely competitive environment but we believe that the Next-Gen Triton not only accepts this challenge but also raises the bar with a range of models that allow drivers to define their own adventure.
The Next-Gen Triton range offers tailored special editions and the strongest warranty in class as it invites South Africans to embrace the journey ahead,” says Jeffrey Allison, general manager: Marketing at Mitsubishi Motors South Africa (MMSA).
Now in its sixth generation, the Next-Gen Triton has been completely redesigned from the ground up. All elements including
the interior and exterior design as well as the chassis, ladder frame and engine have been completely reimagined. With a reputation for toughness to live up to it truly has evolved to meet the needs of the modern day bakkie owner.
According to Mitsubishi the range boasts a newly developed 4N16 DI-DC engine which utilises a variable geometry turbocharger to achieve improved output and improved environmental performance as well as powerful acceleration and responsiveness thanks to the impressive power and torque figures of 135kW at 3 500rpm and 430Nm between 2 250 and 2 500rpm. This engine is paired to either a six-speed automatic transmission or a six-speed manual transmission with shift by wire technology.
GL models are fitted with 2.4-litre DI-DC engine that offers 81kW at 4000rpm and 200Nm between 1000 and 3750rpm and which is paired to a five-speed manual transmission.
Across the model range the NextGen Mitsubishi Triton strikes a balance between lifestyle and commercial use, key to this is a larger load bin and a 3.5-ton towing capacity. The cargo bed height has been lowered by 45mm to 820mm compared to the previous model and the upper surface area of the bumper corner has been enlarged and reinforced with a frame to be used as a foot hold for improved practicality.
Mitsubishi will be offering a wide range of accessories for fitment to the Next-Gen Triton, allowing customers to customise their vehicle to suit both private and commercial needs and their specific lifestyle or working requirements. These include protectors, dress-up accessories, a sports bar, fender arch mouldings, side door garnishes and grille emblems.
GWM P-500 IS THE NEW KING
Meanwhile, the GWM’s P500’s crowning took place at the NAMPO Cape exhibition in Bredasdorp, one of the largest agricultural hubs in the country. Here it impressed the judging panel with its exceptional performance across all categories. The vehicle excelled in 4X4
Mitsubishi Motors South Africa (MMSA) recently announced the arrival of its Next-Gen Triton, an evolution in the iconic bakkie’s 46-year legacy.
driving and capability tests, off-road performance and towing tests, showcasing its superior handling dynamics and luxury features. The P500 HEV not only won the 161–200+kW category but also emerged as the overall competition winner.
Additionally, the GWM P500 2.4T 9AT 4X4 secured the top position in the 126–160kW category, further demonstrating GWM’s growing prowess in the bakkie segment.
“We are thrilled to see the GWM P500 HEV recognised as the South African Bakkie of the Year,” said Kevin Lee, managing director of GWM South Africa. “This win is a testament to GWM’s commitment to innovation and excellence. The P500 HEV’s blend of hybrid technology, luxury and rugged capability sets a new benchmark in the bakkie category.”
The GWM P500 HEV stands out with its stateof-the-art hybrid powertrain, combining a
78kW electric motor with a 2.0-litre petrol engine to deliver a remarkable 255kW and 648Nm of torque. This powertrain is complemented by a 9-speed automatic transmission, ensuring a smooth and dynamic driving experience. The P500 HEV achieves a claimed combined fuel consumption of 9.8 l/100km and CO2 emissions of 225g/km and a maximum towing capacity of 3500kg, highlighting its versatility.
The GWM P500’s victories in both the 126–160kW and 161–200+kW categories, coupled with its overall win as Bakkie of the Year, underscore GWM’s commitment to excellence and innovation in the automotive industry. The P500 HEV’s achievements highlight its exceptional blend of performance, luxury and advanced technology, setting a new standard for bakkies in South Africa.
Below: Next-Gen Mitsubishi Triton
Contractors working in remote locations face challenges that extend far beyond the scope of their core tasks. In rugged terrains and isolated areas the reliability of their vehicles becomes as critical as their tools. Central to this reliability is the quality of their tyres, particularly when operating bakkies—the workhorses of South African contractors. Investing in high-quality off- road tyres is essential.
Off-road conditions are notoriously harsh on tyres. Loose gravel, rocky outcrops and uneven terrain on construction sites can accelerate wear and tear, reducing the lifespan of standard tyres. Good off-road tyres are designed with durability in mind, often featuring reinforced sidewalls and tougher rubber compounds. This ensures they can withstand the rigours of daily use in challenging conditions, providing contractors with a longer-lasting solution that reduces downtime and the need for frequent replacements.
Brands such as BFGoodrich, Goodyear and Continental offer off-road options that excel in wear resistance. These tyres are built to endure South Africa’s diverse landscapes, from installing masts on the rocky trails of the Karoo to game lodges on the sandy tracks of the Limpopo. Choosing tyres
with a proven track record in durability not only ensures better performance but also reduces long-term operating costs.
Few things are as frustrating—and potentially dangerous—as a puncture in the middle of a remote site. Contractors often traverse areas littered with sharp objects, metal debris or thorny vegetation. High-quality offroad tyres come equipped with advanced puncture- resistant technology, such as Kevlar-reinforced layers or thicker tread designs, to mitigate the risk of tyre damage.
Tyres like the Continental CrossContact and Michelin LTX Force are specifically engineered for both off-road resilience and on-road comfort, featuring materials and designs that minimise punctures. These tyres also allow contractors to work with confidence, knowing their vehicles are equipped to handle unexpected challenges.
A contractor’s bakkie often needs to transition seamlessly between gravel roads and tarred highways, requiring tyres that can perform well in both environments. Offroad tyres with deeper, more aggressive tread patterns ensure excellent traction on loose surfaces, reducing the risk of slipping or losing control on steep inclines or wet
gravel roads. At the same time, tyres with multi-purpose designs, such as Bridgestone Dueler or Pirelli Scorpion, offer stability and comfort on tarred roads, making them ideal for mixed-use conditions.
The superior road holding of these tyres not only enhances safety but also improves fuel efficiency by providing a smoother, more controlled ride. For contractors frequently transporting heavy loads or towing equipment, reliable grip is indispensable.
South Africa’s tyre market is well-stocked with leading off-road tyre brands, including the before mentioned as well as Dunlop, Yokohama and Maxxis, each offering products tailored to the demands of contractors. Local suppliers and retailers, such as Tiger Wheel & Tyre and Supa Quick, provide expert advice and services, helping contractors select tyres that suit their specific needs and budgets.
Investing in premium tyres safeguards your bakkie and ensures that work continues smoothly, even in the most challenging environments. With trusted brands readily available in South Africa, there’s no excuse to skimp on this critical component of your vehicle.
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