3days Compressive strength of concrete

Mehboob

Senior Member
Compressive strength of concrete after 3days is 20N/mm² for M25 grade.is this good or bad because 3days strength should be 40 percent please anyone put some on this thank you
 

PALANISAMY C

Junior Member
Compressive strength of concrete after 3days is 20N/mm² for M25 grade.is this good or bad because 3days strength should be 40 percent please anyone put some on this thank you
Its good but may be its not M25 should be more in the way of design or execution problem. check 28th days and analyze well then you know the cause of this and please share to us what is the cause .
 
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This may be true when High alumina cement use at site. Due high alumina content , too early gain of strength take place.Early gain of strength is good when you have to do fast erection but problem is due to release of large heat of hydration very short span of time , this develops temperature gradient within concrete & results into cracking. This cracking can cause corrosion of steel & make concrete structure less durable.
It is advisable to use high alumina cement for shallow concrete ( member which have less concrete volume & thickness)