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Question
What is the proportion of cement agg. and sand for M20,M25 
and M30?
 Question Submitted By :: Civil-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
M20 - 1(Cement):1(1/2)(Fine aggregate):3(Coarse aggregate)
M25 - 1(Cement):1(Fine aggregate):2 (Coarse aggregate)
 
Is This Answer Correct ?    68 Yes 14 No
G.karthikeyan
 
Answer
# 2
mM20 : 1:1.5: 3

M25 : is a design mix. & the proportion can be obtained
only on the basis of materials required & only in the lab.
 
Is This Answer Correct ?    42 Yes 8 No
Shabarish
 
 
 
Answer
# 3
The mix proportions for M20 & M25 both, shall be designed
by laboratory trials and designed according to BIS 10262,
383 & 456 or SP 23. The ratio 1:1.5:3 was given earlier in
IS 456 but IS 456 (2000) does not recommend volumetric
batch for even M20 and hence both should be designed as per
requirement, i.e. it depends on the type of cement,
gradation of aggregates,workability required and
importantly the water cement ratio.
 
Is This Answer Correct ?    20 Yes 2 No
Bhavna Tripathi
 
Answer
# 4
M20 1:1.5:3
M25 1:1:2
M30 will depend upon the mix design
 
Is This Answer Correct ?    19 Yes 1 No
Ashish
 
Answer
# 5
M10 manual mix, proportion is 1:3:6(C:FA:CA)
M15 manual mix, proportion is 1:2:4

> M15 are design Mix, and proportion on Weight basis (not by
volume basis) depend upon grade/type of cement, type of fine
aggregate and Coarse aggregate

However for the estimate purpose the cement can be calculated
For M15 (1:2:4) cement is 6.37 bags/Cum
M20(1:1.5:3) Cement -8.09 bags/Cum
M25 (1:1:2)cement -12.2 bags/Cum
 
Is This Answer Correct ?    22 Yes 4 No
Nimmakayala
 
Answer
# 6
M20 1:1 1/2:3
M25 1:1:2
M30 Proportion not specified its depending upon mix design'
 
Is This Answer Correct ?    16 Yes 4 No
Tiru
 
Answer
# 7
M5,M7.5,M10,M15,M20 -nominal mixes(by wt or by volume)
M25-both nominal and design mix
M30,M35,M40-design mixes(mixes designed specially in lab)
 
Is This Answer Correct ?    2 Yes 0 No
Sobhanbabu
 
Answer
# 8
concrete is designed by Job Mix Formulae, not just by
taking some standard values
 
Is This Answer Correct ?    1 Yes 3 No
Aditya Richie
 
Answer
# 9
M 15 - 1:2:4 , M20 - 1:1.5"3 , M30 - 1:1:2 
Is This Answer Correct ?    2 Yes 8 No
Muthazhagi
 
Answer
# 10
M20 1:2:4
M25 1:1.5:3
M30 1:1:2
 
Is This Answer Correct ?    2 Yes 21 No
Deepak Kumar
 

 
 
 
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