38814130-ACI

ACI METHOD OF MIX DESIGN Design Stipulation (to be given) Characteristic compressive strength required in the field at 28 days 20

20 N/mm2

Standard deviation Slump required

4 N/mm2 50 mm

 Test data of material (to be determined in the laboratory) Specific gravity of cement 3.15 Specific gravity of FA 2.65 Specific gravity of CA 2.7 C.A Dry loaded density 1600 kg/m3 Max size of C.A 20 mm Fineness Modulus of F.A 2.8 Air entrained 2%

Step 1: Avg Design strength % of results allowed to fall below min

2.5

K=

#NAME? N/mm2

Avg design Strength

Step 2 : Determination of Water & Cement Content # ACI 211.1-91 For Non-Air Entrained Concrete (A) For Air Entrained Concrete (B) Selection of W/C

0.70 0.60

B

Err:508 165 kg/m3 185 kg/m3

Wt of water for Non- Air Entrained E ntrained (A) Wt of water for Air Entrained (B) Weight of water Weight of Cement

B

Err:508 kg/m3 Err:508 kg/m3

Step 2 : Determination of C.A & F.A Bulk volume of Coarse Aggregate Weight Of Coarse Aggrregate

0.62 992 kg/m3

Absolute volume method Err:508 m3 Err:508 m3 367.41 m3 0.02 m3

Cement water C.A Air

Err:508 m3

 Total

Err:508 m3 Err:508 kg/m3

Absolute Volume Of F.A Weight Of Fine Aggrregate

Result: Mix Proportions / Water Cement F.A C.A Proportio Err:508 Err:508 Err:508 Err:508 kg Err:508 Err:508 Err:508 992.0

Cost Analysis:

Set Corrency

Current rate of cement per bag Current rate of River Sand(F.A)/cft Current rate of Blue metal(C.A)/cft

Err:508

 € 268 € 22 € 26 €

###

 Total cost of materials / cu.

734.81€

Err:508

2.4 2.6 2.8 3 % of fall K  0.1 0.6 1 2.5 6.6 16 Column1 A B

3.09 2.5 2.33 1.96 1.5 1

Column2 Column3 0.70 165 0.60 185

#NAME? Rs € £ $

Err:508 Err:508 734.81

Comp St N/mm2 15 20 25 30 35 40 45 Agg mm Slump 10 30 12.5 40 20 50 25 60 40 70 50 80 70 90 150 100 110 120 130 140 150 160 170 180

Comp St

W/C Non-Air en Air Entarined conc 45 0.38 40 0.43 35 0.48 0.4 30 0.55 0.46 25 0.62 0.53 20 0.7 0.61 15 0.8 0.71

1 1 1 1

10

15

20

For Non-Air Entrained Concre Slump 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180

10 205 205 205 205 225 225 225 225 225 225 225 240 240 240 240 240

12.5 200 200 200 200 215 215 215 215 215 215 215 230 230 230 230 230

20 185 185 185 185 200 200 200 200 200 200 200 210 210 210 210 210

25 180 180 180 180 195 195 195 195 195 195 195 205 205 205 205 205

40 160 160 160 160 175 175 175 175 175 175 175 185 185 185 185 185

50 155 155 155 155 170 170 170 170 170 170 170 180 180 180 180 180

160 160 160 160 175 175 175 175 175 175

145 145 145 145 160 160 160 160 160 160

140 140 140 140 155 155 155 155 155 155

For Air Entrained Concrete ( 30 40 50 60 70 80 90 100 110 120

180 180 180 180 200 200 200 200 200 200

175 175 175 175 190 190 190 190 190 190

165 165 165 165 180 180 180 180 180 180

130 140 150 160 170 180

200 215 215 215 215 215

190 205 205 205 205 205

180 190 190 190 190 190

175 185 185 185 185 185

160 170 170 170 170 170

2.4 0.5 0.59 0.66 0.71 0.75 0.78 0.82 0.87

2.6 0.48 0.57 0.64 0.69 0.73 0.76 0.8 0.85

2.8 0.46 0.55 0.62 0.67 0.71 0.74 0.78 0.83

3 0.44 0.53 0.6 0.65 0.69 0.72 0.76 0.81

Bulk vol of C.A Agg mm 10 12.5 20 25 40 50 70 150

155 165 165 165 165 165

Non-Air entrained conc Power Regression for Non-Air entrained conc Air Entarined conc Power Regression for Air Entarined conc

25

30

35

40

70 145 145 145 145 160 160 160 160 160 160 160 170 170 170 170 170

150 125 125 125 125 140 140 140 140 140 140 140 0 0 0 0 0

135 135 135 135 150 150 150 150 150 150

120 120 120 120 135 135 135 135 135 135

45

50

Slump Given 50 10 12.5 20 25 40 50 70 150

205 200 185 180 160 155 145 125

10 12.5 20 25 40 50 70 150

180 175 165 160 145 140 135 120

Agg Give 20

150 160 160 160 160 160

135 0 0 0 0 0

2.4 2.6 2.8 3

0.66 0.64 0.62 0.6

2.8

0.62