Rate of shrinkage of floor slabs

[hokie66]

Someone recently posted a plot showing a relationship between ultimate shrinkage percentage and age for several thicknesses of slabs. I have tried to find it without success. Maybe the poster will read this and help again.

We are having a discussion in the AS/NZ Code Issues forum about new provisions for shrinkage rate which have been proposed for our code.

Thanks in advance.

 

[miecz]

Here it is. Judging by the color and the paper, I clipped these from a magazine article 20 years ago but didn't reference the article (duh). They probably came from Concrete Constructon Magazine, or Concrete International.

 

[miecz]

A peek at the back of the graphs reveals that the article from which they came was titled "Owner's Manual."

 

[Ron]

hokie66...here's another you might find helpful. Has a lot of proprietary info, but has other info as well.

Also, check ACI 224 on controlling cracks in concrete.

 

[hokie66]

Thanks, guys.

 

[rapt]

hokie66,

AS3600 shrinkage k1 factor gives you this information!