Re: Concrete Curing Time

["Keith Turk" <kturk@ala.net>]

Concrete reaches 90% of it's strength in the first 48-72 hrs....  70% in the 
first 24 alone...

8 more percent in the next 28 days with the last little bit by 56 days....

after that it never really cures totally.... it's always gaining strength 
.... which is why Old concrete is so dang brittle....

Keep in mind Temperature and humidity have a lot to do with it as well....

Keith