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Answer Posted / harshal.s.khode,inspection eng
There are so many types of mixes design such as
M5,M10 Shall be used for PCC .but now a days M15 is
outdated for RCC construction,normally it can be used for
PCC work. As per latest INDIAN STANDARD CODES , the started
grade of concrete for RCC as M20.
For grade M20,M25 used for RCC structure.
After grade of M25 the mix design is prepared .depending
upon the type of structures higher grade of concrete is
used asM25,M30,M35,M40,M45,M50,M55,M60,M65,M70,M75,M80
etc.but in india the grade of concrete available upto M60
as per my knowledge, this is not perfect.
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