Answer / srilakshmi

M10 (1:3:6) - 34 to 36 lit(Water),Cement - 226kgs
M15 (1:2:4) - 29 to 32 lit(Water),Cement - 313kgs
M20 (1:1½:3)- 26 to 30 lit(Water),Cement - 404kgs
M25 (1:1:2) - 21 to 27 lit(Water),Cement - 563kgs

Answer / krishna kishore rajana

M 5 (1:5:10) - 60 lit(Water)
M 7.5(1:4:8) - 45 lit(Water)
M 10 (1:3:6) - 34 lit(Water)
M 15 (1:2:4) - 32 lit(Water)
M 20 (1:1½:3)- 30 lit(Water)
M 25 (1:1:2) - 27 lit(Water)

Answer / piyush singh

plain concrete

m15 = 0.60 mild
m20 = 0.60 moderate
m25 = 0.40 extrme

RCC

m20 = 0.55
m25 = 0.50
m30 = 0.45
m35 = 0.45
m40 = 0.40

Answer / parveen kumar joshi lucknow

Water cement ratio are always same that is around 48% of the
weight of cement less cement less water high cement high
water in high grade cement slump ratio is increased by adding
plastisizer by replacing water to increase the workability of
concrete.

Answer / ketan kumar bhatt

DESIGN MIX:
M10 ( 1 : 3.92 : 5.62) 
Cement : 210 Kg/ M 3 
20 mm Jelly : 708 Kg/ M 3 
12.5 mm Jelly : 472 Kg/ M 3 
River sand : 823 Kg/ M 3 
Total water : 185 Kg/ M 3 
Fresh concrete density: 2398 Kg/M 3
M20 ( 1 : 2.48 : 3.55) 
Cement : 320 Kg/ M 3 
20 mm Jelly : 683 Kg/ M 3 
12.5 mm Jelly : 455 Kg/ M 3 
River sand : 794 Kg/ M 3 
Total water : 176 Kg/ M 3 
Admixture : 0.7% 
Fresh concrete density: 2430 Kg/ M 3
M25 ( 1 : 2.28 : 3.27) 
Cement : 340 Kg/ M 3 
20 mm Jelly : 667 Kg/ M 3 
12.5 mm Jelly : 445 Kg/ M 3 
River sand : 775 Kg/ M 3 
Total water : 185 Kg/ M 3 
Admixture : 0.6% 
Fresh concrete density: 2414 Kg/ M 3 
Note: sand 775 + 2% moisture, Water185 -20.5 = 
164 Liters, 
Admixture = 0.5% is 100ml
M30 ( 1 : 2 : 2.87) 
Cement : 380 Kg/ M 3 
20 mm Jelly : 654 Kg/ M 3 
12.5 mm Jelly : 436 Kg/ M 3 
River sand : 760 Kg/ M 3 
Total water : 187 Kg/ M 3 
Admixture : 0.7% 
Fresh concrete density: 2420 Kg/ M 3 
Note: Sand = 760 Kg with 2% moisture 
(170.80+15.20)
M35 ( 1 : 1.79 : 2.57) 
Cement : 410 Kg/ M 3 
20 mm Jelly : 632 Kg/ M 3 
12.5 mm Jelly : 421 Kg/ M 3 
River sand : 735 Kg/ M 3 
Total water : 200 Kg/ M 3 
Admixture : 0.7% 
Fresh concrete density: 2400 Kg/ M 3 
Note: sand = 735 + 2%, Water = 200- 14.7 = 
185.30, 
Admixture = 0.7%
M40 ( 1 : 1.67 : 2.39) 
Cement : 430 Kg/ M 3 
20 mm Jelly : 618 Kg/ M 3 
12.5 mm Jelly : 412 Kg/ M 3 
River sand : 718 Kg/ M 3 
Water Cement ratio : 0.43 
Admixture : 0.7% 
Note: Sand = 718 + Bulk age 1%
M45 ( 1 : 1.58 : 2.26) 
Cement : 450 Kg/ M 3 
20 mm Jelly : 626 Kg/ M 3 
12.5 mm Jelly : 417 Kg/ M 3 
River sand : 727 Kg/ M 3 + Bulk age 1% 
Water Cement ratio : 0.43 
Admixture : 0.7%
M50 ( 1 : 1.44 : 2.23) 
Cement : 450 Kg/ M 3 
20 mm Jelly : 590 Kg/ M 3 
12.5 mm Jelly : 483 Kg/ M 3 
River sand : 689 Kg/ M 3 + Bulk age 12% 
Water Cement ratio : 0.36 (188 Kg) 
Admixture : 1.20%3 
Micro silica : 30 Kg 
Super flow 6.7% of cement

Answer / pradeep

M10 (1:3:6) - (0.75%) 37 to 40 lit(Water),Cement - 215kgs
M15 (1:2:4) - (0.55%)27 to 30 lit(Water),Cement - 310kgs
M20 (1:1½:3)- (0.42%)20 to 24 lit(Water),Cement - 395kgs
M25 (1:1:2) - (0.3%)15 to 18 lit(Water),Cement - 560kgs

Answer / pramod abhimannue

More typical water-cement ratios of 0.4 to 0.6 are used.
The 1997 Uniform Building Code specifies a maximum 0.50
water-to-cement ratio (1:2).

Answer / ketan kumar bhatt

Water 0.45 for 1 : 1 : 2 concrete

Water 0.5 for 1 : 1.5 : 3 concrete

Water 0.5 to 0.6 for 1 : 2 : 4 concrete.

Answer / yogesh

Generally the water cencement ratio varies from 0.4 to 0.8 , It depends on grade of concrete as the grade of concrete increases w/c ratio bcome less.
W/c ratio is main cause of strengthening of concrete so if w/c ratio is less strength will be more and if w/c ratio is more strength will be less.

Answer / p.s.vijaya bhaskar

M10 concrete is very low grade so
Water-192/cum
Cement-150/cum
Flyash-150/cum
So water cement ratio-0.64 is ok after 28days 25mpa
U need more strength add cement content 20kg
Using the admixture is best way-1.5/cum
Because workabality

M20 grade
Water-185
Cement-160kg/cum
Flyash-150kg/cum
W/c-0.59

M30-grade
Cemnt-200kg/cum
Flyash-170kg/cum
Water-176
W/c-0.47

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