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Concrete Mix designs for M15,M20,M25,M30 and M35
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Answer Posted / satyavir singh
as per latest IS codes and Cement technology minimum 33MPa 28days
then approximate mix is follows
Design Mix:
M10 ( 1 : 3.92 : 5.62)
Cement : 210 Kg/ M3
20 mm Jelly : 708 Kg/ M3
12.5 mm Jelly : 472 Kg/ M3
River sand : 823 Kg/ M3
Total water : 185 Kg/ M3
Fresh concrete density: 2398 Kg/M3
M20 ( 1 : 2.48 : 3.55)
Cement : 320 Kg/ M3
20 mm Jelly : 683 Kg/ M3
12.5 mm Jelly : 455 Kg/ M3
River sand : 794 Kg/ M3
Total water : 176 Kg/ M3
Admixture : 0.7%
Fresh concrete density: 2430 Kg/ M3
M25 ( 1 : 2.28 : 3.27)
Cement : 340 Kg/ M3
20 mm Jelly : 667 Kg/ M3
12.5 mm Jelly : 445 Kg/ M3
River sand : 775 Kg/ M3
Total water : 185 Kg/ M3
Admixture : 0.6%
Fresh concrete density: 2414 Kg/ M3
Note: sand 775 + 2% moisture, Water 185 -20.5 = 164 Liters,
Admixture = 0.5% is 100ml
M30 ( 1 : 2 : 2.87)
Cement : 380 Kg/ M3
20 mm Jelly : 654 Kg/ M3
12.5 mm Jelly : 436 Kg/ M3
River sand : 760 Kg/ M3
Total water : 187 Kg/ M3
Admixture : 0.7%
Fresh concrete density: 2420 Kg/ M3
Note: Sand = 760 Kg with 2% moisture (170.80+15.20)
M35 ( 1 : 1.79 : 2.57)
Cement : 410 Kg/ M3
20 mm Jelly : 632 Kg/ M3
12.5 mm Jelly : 421 Kg/ M3
River sand : 735 Kg/ M3
Total water : 200 Kg/ M3
Admixture : 0.7%
Fresh concrete density: 2400 Kg/ M3
Note: sand = 735 + 2%, Water = 200- 14.7 = 185.30,
Admixture = 0.7%
M40 ( 1 : 1.67 : 2.39)
Cement : 430 Kg/ M3
20 mm Jelly : 618 Kg/ M3
12.5 mm Jelly : 412 Kg/ M3
River sand : 718 Kg/ M3
Water Cement ratio : 0.43
Admixture : 0.7%
Note: Sand = 718 + Bulkage 1%
M45 ( 1 : 1.58 : 2.26)
Cement : 450 Kg/ M3
20 mm Jelly : 626 Kg/ M3
12.5 mm Jelly : 417 Kg/ M3
River sand : 727 Kg/ M3+ Bulkage 1%
Water Cement ratio : 0.43
Admixture : 0.7%
M50 ( 1 : 1.44 : 2.23)
Cement : 450 Kg/ M3
20 mm Jelly : 590 Kg/ M3
12.5 mm Jelly : 483 Kg/ M3
River sand : 689 Kg/ M3 + Bulkage 12%
Water Cement ratio : 0.36 (188 Kg)
Admixture : 1.20%3
Micro silica : 30 Kg
Super flow 6.7% of cement
as per CPWD M15=240Kg, M20=320Kg, M25=330Kg, M30=340Kg, M35=350Kg CEMENT FOR RMC
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