Answer / m jain

20 N/mm2

Answer / shaji

for M20 ( not m20) concrete the strength is M Pa(N/mm2). M30 it is 30 M Pa

Answer / inder

Characteristic strength of M20 grade concrete will be equal
to or more than 20kn/m2 after 28 days of its casting.

Answer / ranjan

M-20 20 Mpa of 28 days compressive strength

Answer / ravi

20 N/mm2
of 28 days compressive strength

Answer / naseem khan

M-20 20 Mpa
can anyone tell me what is MPa in this above formulla

As per thumb rule cement required per 1 cum of M20 concrete is 411Kg/cum(1.57/5.5=0.285cum of cement i.e 0.285*1440=411Kg).But as per PWD rate analysis cement required is 347Kg/cum.the difference is 64Kg.This kind of difference is coming every grade of concrete.Can you give perfect suggestion regarding this.

2 Answers  

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The slenderness ratio of a column is zero when its length ??

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0 Answers   Gammon,

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Difference between tension and compression zone

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