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Question
what are the diffrent kind of grades in concrete and what does 
M means while specifyng the grades?
 Question Submitted By :: Civil-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
M stands for Mix
Grades vary from M5 to M65 ( Indian Practice )
 
Is This Answer Correct ?    29 Yes 3 No
Gurumoorthy
 
Answer
# 2
M-mix
M20,M25,M30,M35,M40,M45
 
Is This Answer Correct ?    14 Yes 0 No
Shalini
 
 
 
Answer
# 3
Ordinary concrete- M10,M15,M20
Standard Concrete-M25,M30,M35,M40,M45,M50,M55
High Strength concrete-M60,M65,M70,M75,M80
Here are two grades also specified in BIS for lean concrete
M5 and M7.5
Where M refers to Mix and the given no. specified the
characteristics compressive strength of 150 mm cube after 28
days curing on normal temperature..
 
Is This Answer Correct ?    13 Yes 1 No
Ajay Prasad
 
Answer
# 4
M-stands for mix (like m20=1:2:3)
Types of grade are M10,M20,,,,,,,,,,,,,,,,M50,M60ETC
 
Is This Answer Correct ?    18 Yes 8 No
Dinesh
 
Answer
# 5
there are three types of grade in concrete.
1.normal mix concrete
2.standard mix concrete
3.high strength mix concrete
M means mix proposition.
 
Is This Answer Correct ?    6 Yes 2 No
S.thiyagarajan
 
Answer
# 6
In the designation of a concrete mix,letter M refers to the mix and the number to the specified characteristic compressive strength of 15 cm. cube at 28 days,express in N/mm2.As a example M25 = 25 N /mm2 or 250 Kg./cm2 (app). 
Is This Answer Correct ?    3 Yes 2 No
Debasish Pramanick
 
Answer
# 7
Ordinary concrete- M10,M15,M20
Standard Concrete-M25,M30,M35,M40,M45,M50,M55
High Strength concrete-M60,M65,M70,M75,M80
Here are two grades also specified in BIS for lean concrete
M5 and M7.5
Where M refers to Mix and the given no. specified the
characteristics compressive strength of 150 mm cube after 28
days curing on normal temperature..
 
Is This Answer Correct ?    0 Yes 0 No
S.rajmohan
 
Answer
# 8
Ordinary concrete- M10,M15,M20
Standard Concrete-M25,M30,M35,M40,M45,M50,M55
High Strength concrete-M60,M65,M70,M75,M80
Here are two grades also specified in BIS for lean concrete
M5 and M7.5
Where M refers to Mix and the given no. specified the
characteristics compressive strength of 150 mm cube after 28
days curing on normal temperature
 
Is This Answer Correct ?    0 Yes 0 No
Amit Raval
 
Answer
# 9
M means concrete cube casting,curing after 28days
compressive stength
 
Is This Answer Correct ?    4 Yes 11 No
Suresh Kannan,n
 

 
 
 
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