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RE: Have you heard of watering your foundation?

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Some contractors do this to help cure the slab when the weather is hot.  If the water is not sprayed on the surface to keep it moist, the surface will dry up quicker than the underlying concrete and cause cracks. The cooling water however should not be excessively cooler than the concrete or that can cause thermal stresses and thus cracking.  If you would like to read more about moist curing pick up a copy of the PCA "Design and control of Concrete Mixtures"
 
 HTH
 
Greg Meyer
-----Original Message-----
From: Trobridge, Bruce [mailto:Bruce.Trobridge(--nospam--at)ogs.state.ny.us]
Sent: Monday, November 18, 2002 10:47 AM
To: 'seaint(--nospam--at)seaint.org'
Subject: Have you heard of watering your foundation?

I was asked this question by my brother who is building a house in the Dallas area. I am a structural engineer in New York state and my response was- What? Why? I have not heard of this practice and neither has anyone I work with. The people he has spoken to (who are not engineers) say that if you don't water the concrete it somehow loses strength and cracks. The only thing I can figure is that the clay soil there has not been preconsolidated by glaciers as it has here and the moisture is kept up to prevent consolidation and settlement of the house. Am I on the right track?

Bruce C. Trobridge PE
Senior Building Structural Engineer
NYS - Office of General Services
(518) 486-1749