mix design for quary sand concrete

7/22/2019 Mix Design for Quary Sand Concrete

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7.4 DESIGN STIPULATIONS: ( For 20% of quary sand replacing by sand)

Grade Designation M-20

Type of cement O.P.C-53grade

Fine Aggregate Zone-II

Sp. Gravity Cement 3.15

Sp. Gravity Fine Aggregate 2.66

Sp. Gravity Coarse Aggregate 2.68

TARGET MEAN STRENGTH

fck=fck+(Sxt)

= 20 + (4.0 X 1.65) = 26.6 MPa

SELECTION OF WATER CEMENT RATIO

Water cement ratio = 0.45

AIR CONTENT

Air content=2%

CALCULATE OF WATER CONTENT

Water content =186 kg (As per Table No. 4, IS: 10262)

% of fine Agg =35%

SAND CONTENT

Sand content=35+1.5%

=36.5%

CALCULATE THE CEMENT CONTENT

w/c = 0.45

186/0.45 =c

Cement content =414kg/m3

CALCULATE C.A &F.A (AS PER IS: 10262, CI, NO.3.5.1)


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V = (w+(c/sc) + (1/p) (fa/sfa)) x (1/1000)

1-0.02 = (186+ (414/3.15) + (1/0.365) x (fa/2.66) x (1/1000)

Fa= 643.29 kg/m3

Where:

V = absolute volume of fresh concrete, which is equal to gross volume (m3) minus the

volume of entrapped air,

W = mass of water (kg) per m3of concrete,

C = mass of cement (kg) per m3of concrete,

Sc= specific gravity of cement,

(p) = Ratio of fine aggregate to total aggregate by absolute volume,

(fa) , (ca) = total mass of fine aggregate and coarse aggregate (kg) per m3of

Concrete respectively, and

Sfa,Sca= specific gravities of saturated surface dry fine aggregate and Coarse

aggregate respectively.

CALCULATE THE QUARY SAND (20%)

Silica fume =643.29X20/100=128.65kg/m3

COARSE AGGREGATE

C.A= (1-P/P)Xfax(sca/ sfa)

= (1-0.365/0.365) x643.29x (2.68/2.66)

=1127.56kg/m3

Hence mix design per m3

7.5 MIX PROPORTION


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TABLE 7 MIX PROPORTION

Cement

(kg)

FA

(kg)

CA

(kg)

QUARRY DUST

(kg)

Water

(liter)

414 643.29 1127.56 128.65 186

Cement =414 kg

Water = 186 kg

Fine aggregate = 643.29 kg

coarse aggregate = 1127.56 kg

CEMENT: F.A.: C.A/WATER = 1:1.55: 2.72/0.45


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7.4 DESIGN STIPULATIONS: ( For 30% of quary sand replacing by sand)

Grade Designation M-20

Type of cement O.P.C-53grade

Fine Aggregate Zone-II

Sp. Gravity Cement 3.15

Sp. Gravity Fine Aggregate 2.66

Sp. Gravity Coarse Aggregate 2.68

TARGET MEAN STRENGTH

fck=fck+(Sxt)

= 20 + (4.0 X 1.65) = 26.6 MPa

SELECTION OF WATER CEMENT RATIO

Water cement ratio = 0.45

AIR CONTENT

Air content=2%

CALCULATE OF WATER CONTENT

Water content =186 kg (As per Table No. 4, IS: 10262)

% of fine Agg =35%

SAND CONTENT

Sand content=35+1.5%

=36.5%

CALCULATE THE CEMENT CONTENT

w/c = 0.45

186/0.45 =c

Cement content =414kg/m3


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CALCULATE C.A &F.A (AS PER IS: 10262, CI, NO.3.5.1)

V = (w+(c/sc) + (1/p) (fa/sfa)) x (1/1000)

1-0.02 = (186+ (414/3.15) + (1/0.365) x (fa/2.66) x (1/1000)

Fa= 643.29 kg/m3

Where:












Quary dust =643.29X30/100=192.98kg/m3

COURSE AGGREGATE


= (1-0.365/0.365) x643.29x (2.68/2.66)

=1127.56kg/m3



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7.5 MIX PROPORTION


Cement

(kg)

FA

(kg)

CA

(kg)

QUARRY DUST

(kg)

Water

(liter)

414 643.29 1127.56 192.98 186

Cement =414 kg

Water = 186 kg





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V = (w+(c/sc) + (1/p) (fa/sfa)) x (1/1000)

1-0.02 = (186+ (414/3.15) + (1/0.365) x (fa/2.66) x (1/1000)

Fa= 643.29 kg/m3

Where:












Silica fume =643.29X10/100=64.32kg/m3

COARSE AGGREGATE


= (1-0.365/0.365) x643.29x (2.68/2.66)

=1127.56kg/m3


7.5 MIX PROPORTION


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Cement

(kg)

FA

(kg)

CA

(kg)

QUARRY DUST

(kg)

Water

(liter)

414 643.29 1127.56 64.32 186

Cement =414 kg

Water = 186 kg




mix design for quary sand concrete

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