md.tanweer alam


{ City } saharsa
< Country > india
* Profession * noida
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Question { Srinidhi Constructions, 18557 }

what u mean by M20


Answer

M refer to the mix & 20 refer the (20N/mm^2) characteristic compressive strength of 150*150*150 mm^3 concrete block after 28 days with proper curing.

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