IRJET- Mechanical Behavior of Smart Concrete

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Mechanical Behavior of Smart Concrete Tarun rana1, Dharmendra Kushwaha2, Pankaj Kumar3 1Post

Graduate student, Dept of Civil Engineering, Swami Vivekananda Subharti University Professer , Dept of Civil Engineering, Swami Vivekananda Subharti University 3Assitant Professer , Dept of Civil Engineering, Swami Vivekananda Subharti University 1-3Bhai Jaita Subharti Engineering College(SVSU) Uttar Pradesh, India ---------------------------------------------------------------------***---------------------------------------------------------------------2Assitant

Abstract -The objective of this study is to match the mechanical behavior of sensible concrete with the quality concrete. This

analysis is planned to adding chemical admixtures for creating self-compacting concrete (SCC). it’s planned to use self-curing compound rather then typical water activity. Several researchers studied regarding the self-compacting concrete solely and not for self-compacting and self-curing concrete, however this study planned a method for self-compacting and self-curing concrete. Self-Compacting Concrete (SCC) is achieved by reducing the quantity magnitude relation of combination to building material materials, increasing the paste volume and mistreatment varied consistency enhancing admixtures and super plasticizers. Activity techniques and activity period considerably affects “curing efficiency”. Techniques utilized in concrete activity area unit in the main divided into 2 groups namely, Water adding techniques and Water-retraining techniques. Selfcuring technique is an component of water retentive technique mistreatment varied strategies. Throughout this paper selfcompacting self-curing concrete (SCSCC) has been studied mistreatment Polyethylene Glycol 4000 (PEG4000). Mechanical properties like compressive strength, split tensile strength and flexural behavior of beam has been studied. The specimen with 1% PEG4000 performed well compared to plain specimen. The last ward load and supreme deflection for sensible concrete beam was exaggerated 23.53% and 35.47% in comparison management beam .

Key Words- SCC: Self Compacting Concrete, Composite materials, CFT, UPVC Columns 1. INTRODUCTION- Smart concrete could also be a extremely broad class of fabric that features self-compacting concrete, self-sensing concrete, self-healing concrete etc Self-Compacting Concrete (SCC) will be a high executable concrete that has high strength and high performance which can flow beneath its own weight through restricted sections while not segregation and hemorrhage (EFNARC, European Federation of Producers and Applicators of Specialist Products for Structures, 2002). SCC has substantial industrial edges due to ease of placement in advanced forms with congested reinforcement. Self-curing or internal solidification might be a way .which might be used to supply additional moisture in concrete for more effective hydration of cement and reduced self-desiccation Self-Compacting Concrete (SCC) was initial developed in 1988 by academic Okamura meant to spice up the durability properties of concrete structures. SCC is printed as concrete that’s ready to flow and consolidate beneath its own weight. SCC is considering to be one in every of the foremost triple-crown innovation in business of construction. Self -compacting concrete (SCC) can be extremely flow ready concrete that does not segregate and might unfold into place, fill the formwork with heavily engorged reinforcement with none mechanical vibration. In SCC, the aggregates contribute 60–70% of the whole volume.

Correct selection of aggregates has vital influence on the contemporary and hardened properties of concrete characteristics like form, texture and grading influence workability, end ability, bleeding, pump ability, segregation of up to date concrete and strength, stiffness, shrinkage, creep, density, porosity, and sturdiness of hardened concrete.. ; Easier placing; agent concrete sections; larger Freedom in a la mode several investigatory have studied concerning the manufacture sand. Strength characteristics of SCC and use of waste products such as silica oxide fume and introduction of fibers in improving strength characteristics of SCC have been studied and reported in the literature.

Self-curing or internal solidification may well be a technique that’s accustomed give supplementary wetness within the concrete for less complicated association of cement and reduced self-desiccation There unit of measurement 2 major strategies accessible for two internal solidification of concrete. within the initial methodology porous light-weight combination is used to supply an internal supply of water that replaces the water that’s is consumed by chemical shrinkage throughout the association of cement.. Within the gift study the first methodology has been

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adopted. The use of fly ash, blast furnace slag and silica oxide fume in SCC reduces the dosage of super softener required to urge similar slump flow compared to concrete mixes made with only Portland solely cement .

1.1 SCOPE: The scope of these admixtures is not restricted to a 1 dimension. They’re most well-liked in most high rise building constructions where high strength concrete is required, which not the use of super plasticizers. In mass concreting like dam construction, if the speed of association cement is not controlled, there are often associate in the nursing overly massive temperature rise of the order of 500 c top the outer temperature which can end in massive cracks and harm to the structure.

Therefore appropriate measures within the sort of retarding super plasticizers must be taken, that not solely retard the association rate however conjointly increase the strength of the concrete. In prepared mixed concrete construction concrete is to be unbroken contemporary for a relatively larger time, created doable by addition of retarders at the time of blending concrete. There unit of measurement several alternative usages of the admixtures such as in pre stressed concrete, in concrete bridges, in engorged concrete, and so many others. Therefore correct experimental investigations unit of measurement are necessary for determinant the results of the admixture and verify the optimum measure of the admixture.

1.2 OBJECTIVE: The main purpose of the investigation is determinant the appropriate proportion of sand, coarse combination, cement and result of assorted proportioning of super plasticizers in SCC which might offer the most effective worth for concrete compressive strength. Inter curing agent give internal water reservoir, will increases the ratio by creating the thin film with water that reduces the self desiccation at effective proportion amount at the optimal strength..

2. . LITERATURE REVIEW: There unit sort of studies that are mentioned within the literature in respect of sensible concrete. Some of the many contributions square measure concisely mentioned within the literature.

2. (A) : Swamy et. al. (in1990) projected a straight forward methodology to urge a 50 Mpa 28-day strength concrete that have 50 and 65 percent by weight cement replacement with scoria having a relatively low specific surface. The compressive and flexibility strengths and the yielding modulus of these 2 concretes as filled by solidification conditions square measure then bestowed. Concrete having 50 percent scoria replacement has reached nearly ninty percent you look after its target strength of 50 Mpa at 28 days 14 and continued to point modest strength improvement up to 6 months, with none water solidification.

2. (B) Dhir et. al. (1996) worked on self-curing concrete exploitation 2pc computer models, at low dosages, smart strength and improved characteristics were discovered. At high dosages it seems that the admixture encompasses a prejudicial impact on the concrete’s compressive strength.

2. (C) Hans W. Reinhardt et. al. (1998) they incontestable on self-cured high Performance concrete that a partial replacement of traditional weight aggregates by pre wetted light-weight aggregates finishes up in an enclosed water supply for continuous association of cement. Despite water loss by evaporation there is continuous strength gain up to 25% lots of strength after once one year compared to straightforward compressive testing after twenty eight days.

2. (D) Gowripalan et. al. (2001), the mechanism of self-curing are explained as follows:The substance other within the combine chiefly type number one bonds with water molecules and cut back the chemical potential of the molecules that successively reduces the physical phenomenon. This reduces the speed of evaporation from the surface” Self-Curing concrete is that the freshly rising trend within the industry.

2. (E) Barrita et. al. (2004) evaluated high performance concrete mixtures that will be used successfully in hot dry climates. A series of concrete mixtures were ready and dampish cured for either zero , 0.5, 1 or 3 days, or by employing a solidification compound, followed by air drying at 38°C and forty percent ratio. To accomplish this, st martin day by volume of the complete combination content was replaced with light-weight combination. kind I white Portland cement and quartz combination plus the light-weight combination were all elected for his or her low iron content to attenuate adversely poignant the MRI measurements. The concrete mixtures were low strength concrete (W/C=0.60), self -consolidating concrete (W/C=0.33 containing 30% fly ash), and high strength concrete (W/ C=0.30 containing 8% silica fume).

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2. (F) Tarun R. Naik et. al. (2006) impact of rheology on the physical properties of self-curing concrete Potential advantage from concrete exploitation light-weight combination include :Better thermal properties, higher heart resistance, and improved skidresistance, reduced auto genius shrinkage, reduced chloride particle previous ness, improved natural unavoidable.

2. (G) Md. Safiuddin et. al. (2007) administered experiments to review the impact of this sort of curing on the properties of small oxide Concrete with a water binder relation of 0.35. Dry-air solidification created 15.2%, 6.59% and 3.36% cut in compressive strength, dynamic modulus of property and supersonic pulse severally therefore the formation of major reaction product chemical element salt hydrate the foremost important strength providing and body reducer stops before the pores unit of measurement adequately blocked by it. Also, it caused 12.4% and 46.53%increase in initial surface absorption after 10 and 120 minutes severally.

2. (H) C.Selvamony et. al. (2010) investigated on self-compacted self-curing Concrete exploitation limestone powder and clinkers. During this study, the impact of replacement the cement, coarse aggregate and fine combination by limestone powder (LP) with silica fume(SF), quarry dust(QD) and clinkers severally and their mixture of varied proportions on the properties of SCC has been compared.

2. (I) Ravi Kumar M.S. et. al. (2011), an exploratory investigation was conducted to make a comparative study on the properties of High Performance Concrete with oven ash (25% and 50% replacement) and while not oven ash (control concrete) in traditional and aggressive environment exploitation self-curing instead of water solidification.

2. (J) Raghavendra et. al. (2012), exploitation Membrane solidification and Self-Curing ways one will achieve 90% of potency as compared to traditional solidification methodology. Membrane solidification compounds square measure top and are widely used methodology it is best suited in water scarce 2(K) Vilas et. al. (2012) administered an experimental study to investigate the utilization of water soluble polyvinyl alcohol as a self-cutting agent. He complete that Concrete mixes incorporating self-curing agent has higher water retention and better association with time as compared traditional concrete

3. 1 RESULT 1st Trial Mix for Self Compacting Concrete Cement =450kg/m^3

Sand =801 kg/m^3

Coarse aggregate = 801 kg/m^3

1:1.78:1.78 Table 3.1 Effect of Different SNF Dosage in 1

3.2

st

Trial Mix

S. no.

w/c

SNF (%)

Slump flow table diameter (in mm)

1

0.35

.5%

220mm*240mm

2

0.35

.6%

260mm*280mm

3

0.35

.7%

420mm*440mm

4

0.35

.8%

410mm*390mm

5

0.35

.9%

370mm*360mm

6

0.35

1.0%

350mm*330mm

2nd Trial Mix Design for Self Compacting Concrete

Cement = 550 kg/m^3 Sand = 880 kg/m^ Coarse aggregate = 720 kg/m^3 © 2021, IRJET

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1:1.6:1.3 Table 3 .2 Effect of different SNF dosage in 2

nd

trial mix.

S. no.

w/c

SNF (%)

Slump flow table diameter (in mm)

1

0.35

.5%

280mm*300mm

2

0.35

.6%

530mm*570mm

3

0.35

.7%

560mm*600mm

4

0.35

.8%

460mm*520mm

5

0.35

.9%

500mm*470mm

6

0.35

1.0%

490mm*470mm

7

0.36

.5%

300mm*240mm

8

0.36

.6%

620mm*580mm

9

0.36

.7%

700mm*650mm

10

0.36

.8%

600mm*560mm

11

0.36

.9%

570mm*550mm

12

0.36

1.0%

550mm*540mm

3.3 Casting of Mix Design Table 3.3 Composition of Concretes (kg/m3).

Mix no.

PEG4000

Cement (kg/ m3)

Water (kg/m3)

Fine aggregate (kg/

Coarse aggregate (kg/m3)

SNF (%)

M1

-

419.5

188.8

m3) 554

1195

-

M2

-

465

186

646.47

1070

-

M3

0%

550

198

880

720

0.7

M4

.5%

550

198

880

720

0.7

M5

1%

550

198

880

720

0.7

M6

1.5%

550

198

880

720

0.7

M7

2%

550

198

880

720

0.7

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3.4 Test Results of M 30 Conventional Concrete Table 3.4 Test results of M1 mix S. no.

Specimen

1

Cube

2

Cylinder

3

Beam

7 days Strength (N/mm^2)

28

19.86

27.57

21.33

29.3

23.25

31.57

1.57

2.26

1.67

1.9

1.7

2.58

1.28

2.25

1.48

2.27

1.57

2.17

days

Strength

(N/mm^2)

3.5 Test Results of M40 Conventional Concrete Table 3.5 Test results of M2 mix S. no.

specimen

7 days strength (Mpa)

28 days strength (Mpa)

1

cube

29.2

40.7

30.2

42.4

31.4

41.2

2.11

3.02

2.06

3.11

2.24

3.06

3.66

5.24

3.57

5.6

3.62

5.73

2

cylinder

3

beam

3.6 Test Results With 0 % PEG4000 Table 3.6 Test Results of M3 Mix S.no

1

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specimen

Cube

|

7 days strength (Mpa)

28 days strength ( Mpa)

18.6

37.56

21.73

36.55

19.96

29.2

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2

Cylinder

3

3.7

Beam

www.irjet.net 1.67

2.87

1.52

2.78

1.58

2.643

1.236

2.174

1.25

2.573

1.23

2.375

Test Results With . 5 % PEG4000 Table 5.7 Test results of M4 mix S no.

Specimen

7 days strength(Mpa)

28 days strength ( Mpa)

1

Cube

14.358

23.11

14.126

23.17

14.269

23.30

1.283

1.29

1.32

1.1.32

1.245

1.26

1.492

1.74

1.427

1.69

1.372

1.80

2

Cylinder

2

Beam

4. CONCLUSIONS The following education were drawn from this study.      



Strength of the specimen with 1% of PEG4000 enlarged when compared to the conventional specimen with M40.

From the seven days compressive strength results the specimen with 1% of PEG4000 enlarged with conventional specimen with M40 by 8.26%.

From the 7 days splitting tensile strength results the specimen with 1 % of PEG4000 enlarged with typical specimen with M40 by 17.28%.

From the 28 days compressive strength results the specimen with 1% of PEG4000 enlarged with typical specimen with M40 by 1.45%.

From the 28 days splitting tensile strength results the specimen with 1% of PEG4000 enlarged with typical specimen with by 22.22%.

From 7 days flexural lastingness strength results the specimen with 1% of PEG4000 reduce with typical specimen with M40 by 37.58%.

From 28 days flexural tensile strength results the specimen with 1% of PEG4000 reduce with typical specimen with M40 by 45.67%

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5. REFRENCES [1] ACI Committee 305R-99 “Hot Weather Concreting”, Reported by ACI Committee 305,ACI Manual of Concrete Practice, (2009), pp3, [2] C. Selvamony, M. S. Ravi Kumar, S. U. Kannan and S. Basil Gnanappa, (2010), “INVESTIGATIONS ON SELF-COMPACTED SELF-CURING CONCRETE USING LIMESTONE POWDER AND CLINKERS", ARPN Journal of Engineering and Applied Sciences VOL. 5, NO. 3.

[3] M.S. Shetty, “concrete technology”.

[4] MuctebaUysal, Mansur Sumer (May 2011)“Performance of self-compacting concreten containing different mineral admixtures” Science Direct, pp: 4112-4120.

[5] Pamnani Nanak J., Verma A.K., Bhatt Darshana R,( December2013) “Comparision between Mechanical Properties of M30Grade Self Compacting Concrete For Conventional Water Immersion and Few Non- Water based Curing Techniques ”International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-3, Issue- 2,pp:265-272.

[6] Selvamony C., Ravikumar M.S. , Kannan S.U. , Basil Gnanappa S.( July 2009)“development of high self compacted self-curing concrete with mineral admixtures” [14] M.S.Shetty, “concrete technology

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