MINOR PROJECT PART 1MINOR PROJECT PART 1

HIGH STRENGTH CONCRETE USING HIGH STRENGTH CONCRETE USING CHEMICAL ADMIXTURE CHEMICAL ADMIXTURE

SUBMITTED BY:

YATI AGGARWAL2K12/STR/24

SUBMITTED TO: Dr. AWADHESH KUMAR

Dept Of Civil Engineering

OBJECTIVEOBJECTIVE

The objective of this study is to attain the high strength using chemical admixtures.

What is high strength concrete?

There is no fixed definition for this but according to American concrete institute committee it is defined as concrete that has design strength in excess of 6000 psi (41 MPa).

ADVANTAGES OF HSCADVANTAGES OF HSCThe compressive strength is

marginally high.Can be used in structures having

high in-plane compressive strength.High compressive strength /unit

volume / unit weight will reduce the dead load.

Generate dense microstructure thus increases the long term durability.

LITERATURE REVIEWLITERATURE REVIEW

[1] Muhammad Shoaib Ismail* and A. M. Waliuddint presented the effect of rice husk on high strength concrete.

[2] Gemma Rodrı´guez de, Sensale presented on strength development of concrete with rice husk ash.

[3] M.F.M. Zain, M.N. Islam *, F. Mahmud, M. Jamil presented on Production of rice husk ash for use in concrete as a supplementary cementitious material.

[4] Ravande kishore, v.Bhikshma and p.Jeevana prakash presented on Strength Characteristics of High Strength Rice Husk Ash Concrete.

[5] M.F.M. Zain, Md. Safiuddin, H. Mahmud presented on Development of high performance concrete using silica fume at relatively high water/binder ratios.

[6] Mohammed Seddik Meddah, Salim Zitouni, Said Belaabes presented on Effect of content and particle size distribution of coarse aggregate on the compressive strength of concrete.

[7] Liu Baoju*, Xie Youjun, Zhou Shiqiong, Yuan Qianlian presented on Influence of ultrafine fly ash composite on the fluidity and compressive strength of concrete

[8] Chai Jaturapitakkul*, Kraiwood Kiattikomol, Vanchai Sata, Theerarach Leekeeratikul presented on Use of ground coarse fly ash as a replacement of condensed silica fume in producing high-strength concrete.

[9] H. Abdul Razak*, H.S. Wong presented on Strength estimation model for high-strength concrete incorporating metakaolin and silica fume.

[10] M.J. Shannag presented on High strength concrete containing natural pozzolan and silica fume.

LITERATURE REVIEWLITERATURE REVIEW

SUITABLE GUIDELINES FOR SUITABLE GUIDELINES FOR MATERIAL SELECTONMATERIAL SELECTON

The higher the targeted compressive strength, the smaller the maximum size of coarse aggregate.

Up to 70 MPa compressive strength can be produced with a good coarse aggregate of a maximum size ranging from 20 to 28 mm.

To produce 100 MPa compressive strength aggregate with a maximum size of 10 to 20 mm should be used.

Concretes with compressive strengths of over 125 MPa have been produced, with 10 to 14 mm maximum size coarse aggregate.

Using supplementary cementitious materials, such as blast furnace slag, fly ash and natural pozzolans, not only reduces the production cost of concrete, but also increases the strength.

Materials of high quality and their optimum proportions.Failures in NSC is characterized by fractures in the cement

paste and in transition zone b/w paste.Super plasticisers require high fines for cohensiveness of mix

& rapid slump loss. An Ordinary Portland Cement (OPC 53) conforming to the

specification of IS: 12269. Finness is 225m2 /kg.Any suitable water reducing admixture should be used.we

adopted Master Glenium SKY 8777 ,which is free of chloride & low alkali. It is compatible with all types of cements. It is based on second generation polycarboxylic ether polymers.

COARSE AGGREGATE SIEVE COARSE AGGREGATE SIEVE ANALYSISANALYSIS

Sieve size Wt. retained %wt retained

Cumulative wt retained

%finer

20mm 425 gm 8.5% 8.5% 91.5%

16mm 1463.1 gm 29.26% 37.76% 62.24%

12.5mm 2547.7gm 50.95% 88.71% 11.29%

10mm 496.5gm 9.93% 98.64% 1.36%

4.5mm 56.3gm 1.13% 99.77% 0.23%

Pan 11.4gm 0.23% 100% 0%

FINE AGGREGATE SIEVE FINE AGGREGATE SIEVE ANALYSISANALYSIS

Sieve size Wt retained %wt retained

Cumulative wt retained

%finer

4.75mm 20.6gm 2.06% 2.06% 97.94%2.36mm 333.3gm 33.3% 35.36% 64.64%1.18mm 250gm 25% 60.36% 39.64%600u 140gm 14% 74.365 25.64%300u 112.6gm 11.26% 85.62% 14.38%150u 140.3gm 14.03% 99.66% 0.34%90u 2.19gm 0.219% 99.87% 0.13%Pan 0.4gm .04% 100% 0%

SPECIFIC GRAVITY OF SPECIFIC GRAVITY OF CEMENTCEMENT

S. No. Observation material Cement (gm)

1. Weight of material 10

2. Weight of density bottle

(W1 g)

36.4

3. Weight of density bottle +

kerosene (W4g)

81.9

4. Weight of bottle + material

+ kerosene (W3 g)

83.2

5. Weight of bottle + water (W5 g )

85.7

6. Specific gravity G at  Tx0 C 3.188

SPECIFIC GRAVITY OF SPECIFIC GRAVITY OF COARSE AND FINE COARSE AND FINE AGGREGATEAGGREGATE

S. No. Particulars Fine aggregate

Coarse aggregate

1 Mass of Pycnometer(M1) gm 700.5 700.5

2 Mass of pycnometer + material (M2) gm

1175.9 1203.3

3 Mass of pycnometer + material + distilled water (M3) gm

1869.9 1904

4 Mass of Pycnometer + distilled water (M4) gm

1574.5 1574.9

5 Specific Gravity =

G = M2-M1/(M2 – M1) - (M3 – M4)

2.64 2.89

MARSH CONE TESTMARSH CONE TEST

CEMENT(gm)

W/C RATIO

SUPERPLASTICISER(%CEMENT)

QUANTITY(ml) TIME(MIN) REMARKS

100 .28 1.5 120 20 CLOGGED50 .28 2 150 7.5550 .28 2.5 225 10.20

It is a test to check the compatibility of Superplasticiser and cement.

It provides the saturation point ie the minimum time required by the slurry

to flow through the at optimum dosage o Superplaticiser.

CONCRETE MIX DESIGNCONCRETE MIX DESIGN

MIX DESIGN 1

COARSE AGGREGATE FINE AGGREAGATE(Kg)

CEMENT(Kg) WATER(Kg)

SUPERPLATICISER(Kg)20mm(Kg) 10mm(Kg)

17.7372 .886 20.52 12.58 3.0196 0.251490

FA:CA- 1:0.907 W/C - .26 20MM/10MM – 1:0.05WATER CONTENT – 140

CONCRETE MIX DESIGNCONCRETE MIX DESIGN

MIX DESIGN 2

COARSE AGGREGATE FINE AGGREAGATE(Kg)

CEMENT(Kg)

WATER(Kg)

SUPERPLATICISER(mg)

20mm(Kg) 10mm(Kg)

6.2438 0.3121 7.2 4 .96 80

FA:CA- 1:0.907 W/C - .24 20MM/10MM – 1:0.05WATER CONTENT – 130

CONCRETE MIX DESIGNCONCRETE MIX DESIGN

MIX DESIGN 3

FA:CA- 1:0.907 W/C - .24 20MM/10MM – 1:0.05WATER CONTENT – 140

COARSE AGGREGATE

FINE AGGREAGATE(Kg)

CEMENT(Kg)

WATER(Kg)

SUPERPLATICISER(mg)

20mm(Kg) 10mm(Kg)

7.395 0 8.1575 5 1.2 100

RESULTRESULT

MIX DESIGN 1 2 3

7 days compressive strength(MPa)

47 47.5 57.2

28 days compressive strength(MPa)

50 58.5 78.35

Dry rodded density of coarse aggregate is- 1675.867Kg/m3

Dry rodded density of fine aggregate is- 1813.88Kg/m3

Comparison of strength at different w/c ratioComparison of strength at different w/c ratio

THANK YOUTHANK YOU