Moisture loss in S-O-G 1

[Lion06]

I've been searching online for some guidance regarding moisture loss with respect to time for slabs-on-grade, but have come up empty. Am I barking up the wrong tree or just not finding it?
I am tyring to get an idea of how long from the time of the pour that you can assume a S-O-G is essentially done undergoing shrinkage due to loss of moisture.

 

[miecz]

Here are a couple of graphs I copied from a concrete journal some years ago.

 

[haynewp]

It depends on many things including the humidity and temperature. Shrinkage continues to take place over a long period of time, ballpark figure I would assume 75% of the max happens at the first year (ref Mehta & Monteiro).

 

[haynewp]

Are you looking specifically for drying shrinkage alone?

 

[Lion06]

Yes, I'm looking for drying shrinkage only.

miecz- Thanks!

 

[haynewp]

I think the graph of ultimate shrinkage includes more than just drying shrinkage.

 

[archeng59]

type of curing (water ponding, moisture retaining blankets or sheets, curing compounds) will affect the moisture retention. Ambient air temperature, direct exposure to sunshine, humidity affect moisture content.

 

[Lion06]

Anyone have a reference that might quantify expected shrinkage (total or due only to drying) that one might expect with respect to time?

 

[slickdeals]

Look in the ACI manual of standard practice. I don't remember the publication number, but it is "Prediction of Creep, Shrinkage, and Temperature Effects in Concrete"

 

[miecz]

The article linked below is worth a read.