Experimental Study On The Enhancement In Concrete Due To The Ultra-Fine Particles

GRD Journals | Global Research and Development Journal for Engineering | Recent Advances in Civil Engineering for Global Sustainability | March 2016

e-ISSN: 2455-5703

Experimental Study on the Enhancement in Concrete Due to the Ultra-Fine Particles 1Ahmed

Abubakar Jariwala 2Dhaduk Dipak 3Abhishek Rana 4Sunil Jaganiya 5Pritesh Rathod 1,2,3 Student 4,5Assistant Professor 1,2,3,4,5 Department of Civil Engineering 1,2,3,4,5 GIDC Degree Engineering College, Navsari, Gujarat, India Abstract

From the early age, cement is widely used construction material in any type of construction projects. In the modern era, the need and demand of the High Performance Concrete is increasing exponentially. Today Engineering is designing unparalleled structures that are contravention the rulebooks of conventional construction material like Concrete. These changes in the construction industry upsurge the need of the inventive materials. Introducing Micro-Fine particles, an advanced material in concrete that assist cement to overcome its feeble parts and have non-hazardous effect to people. In this paper we are going to discuss about the efficiency, economy and performance of the concrete with the addition of these Micro-Fine Particles obtained from industrial waste. The program is consisted of designing a suitable concrete mix design with the Micro Fine Particles to improve the different parameters in concrete like Compressive Strength, Flexural Strength, Split Tensile Strength and Chlorine Permeability in concrete. The entire test on concrete is conducted with the different percentage of replacement of cement with mineral admixtures. From this results we can say that the in micro fine materials the effect of each material on concrete and its advantages and disadvantages of Micro Fine particles. Testing on the concrete is conducted at M60 Grade.

Keyword- Alccofine, High Performance Concrete, Micro-Fine Particles, Sustainable Development, Silica Fume, UltraFine Fly-Ash, Waste Materials, Chemical & Mineral Admixtures __________________________________________________________________________________________________

I. INTRODUCTION Micro-Fine Particles are basically, A specially processed enhanced materials which are specifically designed and manufactured from the industrial wastes like Iron ore, Fly-Ash, etc. Silica Fume, Alccofine & Ultra-Fine Fly-Ash, these are the some micro fine particles that are manufactured. Every Micro Fine material possesses its unique properties as it imposed on it for a special purpose and to enhance the specific property of the concrete. Apart from the enhancing the properties of the cement, it also helps to reduce the Cement Content in Concrete, ultimately reducing the carbon footprint in the construction industry. Increase in the demand for the Ready Mix Concrete (RMC) & higher grade concrete, also shows the need of superior quality concrete in the construction industry, i.e. Demand for Sustainable Development.

II. MICRO FINE MATERIALS A. Silica Fume Silica Fume also known as Micro-Silica, it is micro fine particles that is used in the concrete as the mineral admixture to improve the different properties of the concrete like workability, Early age strength, Durability, Highly pumpable concrete, Lower the water cement ratio and to develop High Strength Concrete. As an industrial waste material which has property of binding action like cement can be used in concrete as partial replacement, thus reducing the cement content in the concrete and also without sacrificing the strength of concrete and its durability. Silica fume is a by-product of coal fired Ferro-Silicon alloy industries.

Efforts are made all over the world to make use of silica fume in concretes. But so far, only a trivial amount of silica fume produced is put to use. A replacement of 20- 30% is considered as optimum and uncertainties are expressed at higher quantities on the behaviour of concrete.

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Experimental Study on the Enhancement in Concrete Due to the Ultra-Fine Particles (GRDJE / CONFERENCE / RACEGS-2016 / 025)

Fig. 1: Properties of Silica Fume in Concrete

Fig. 2: Capture of Silica Fume

The problems associated with the silica fume were recognized long ago and investigations to make use of silica fume in cement were started very actively decades ago. A large number of investigations have been carried out all over the wor1d.

B. Alccofine Alccofine is micro fine particles developed by the Ambuja cement. Alccofine is material which is obtained from the waste materials of the Iron Ore Industry. It is new material in which is recently made commercially available for the construction industry. Some of the research papers are developed on it showing higher strength gain at early ages as compared to the plain cement concrete. We are currently working on the effect of this material in concrete in the early & later age strength. The size of the particles in the Alccofine is 4-6 Microns. The chemical composition of the Alccofine shows higher percentage of the Alumina Content and Silica Content. The main advantage of the Alccofine over silica fume is the feasibility for the site work and health of the workers. Also the Alccofine is economical as compared to silica fume.

Chemical Properties

Cement

Alccofine

Silica Fume

Silicon dioxide (SiO2) Calcium oxide (CaO) Aluminum oxide (Al2O3) Iron oxide (Fe2O3) Magnesium oxide (MgO)

22.03 65.19 4.03 3.67 0.88

30-36 30-34 18-25 0.8-3.0 6-10

96 0.1 0.1 0.6 0.2

Sulphite (SO3)

2.86

0.1-0.4

-

Sodium oxide (Na2O)

0.12

-

0.1

Potassium oxide (K2O)

0.20

-

0.4

Table 1: Chemical Properties of Cement, Alccofine & Silica Fume.

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Experimental Study on the Enhancement in Concrete Due to the Ultra-Fine Particles (GRDJE / CONFERENCE / RACEGS-2016 / 025)

Physical Properties Cement Alccofine Silica Fume Specific Gravity 3.15 2.6 2.2 Normal Consistency 30-35% Initial Setting Time (min) > 30 Final Setting Time (min) < 600 min Surface Area (cm2/gm) 12,000 20,000 Particle Size (μm) 6-7 4-6 1-2 Table 2: Chemical Properties of Cement, Alccofine & Silica Fume.

C. Ultra-Fine Fly-Ash This is another Ultra-Fine Particles, unlikely to the silica fume and Alccofine this micro fine material is used as micro filler. This material doesn’t possess reactive chemical properties. Thus this can be used as micro filler. It is observed that the workability of the concrete is increased by using the Ultra-Fine Fly Ash. Further results are not tested as we are working on the high grade concrete.

III. CONCRETE MIX DESIGN Materials Cement Silica Fume Alccofine Chemical Admixture Water

Concrete Mix Design For M60 Grade Concrete Reference Mix Plain Cement Alccofine 530 96%, 94%, 92%, 90% 0 0 4%, 6%, 8%, 10% 6 6 154

154

Silica Fume 96%, 94%, 92%, 90% 4%, 6%, 8%, 10% 6 154

Table 3: Concrete Mix Design

IV. TECHNICAL BENEFITS A. 1) 2) 3) 4) 5)

Fresh State Improves workability retention.

Improves flow ability.

Improves rheology.

Reduces segregation.

Reduces heat of hydration.

B. 1) 2) 3) 4) 5)

Hardened State Improves durability.

Improves strength at all ages.

Improves resistance to chemical attack / corrosion.

Imparts light color.

Lowers permeability.

ACKNOWLEDGMENT         

“It is not possible to prepare a project report without the assistance & encouragement of other people. This one is certainly no exception.”

On the very outset of this report, I would like to extend my sincere & heartfelt obligation towards all the personages who have helped me in this endeavor.

Without their active guidance, help, cooperation & encouragement, I would not have made headway in the project.

I am ineffably indebted to Prof. Sunil Jaganiya & Prof. Pritesh Rathod for conscientious guidance and encouragement to accomplish this assignment.

I also acknowledge with a deep sense of reverence, my gratitude towards my parents and member of my family, who has always supported me morally as well as economically.

At last but not least gratitude goes to all of my friends who directly or indirectly helped me to complete this project report.

Any omission in this brief acknowledgement does not mean lack of gratitude.

Thanking You Ahmed Abubakar Jariwala, Abhishek Rana & Dipak Dhaduk.

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Experimental Study on the Enhancement in Concrete Due to the Ultra-Fine Particles (GRDJE / CONFERENCE / RACEGS-2016 / 025)

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