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Re: Have you heard of watering your foundation?

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In a message dated 11/18/2002 12:15:24 PM Eastern Standard Time, falconfield(--nospam--at)attbi.com writes:


Concrete cures thru a process called the heat of hydration


The wording here is not entirely correct.  Heat of hydration is a by-product of the curing process.  Curing is an exothermic reaction - exothermic means heat is given off.

During the process of manufacturing cement,  a great deal of energy is putting into the cement as the constituent materials are ground and dehydrated.  Cement is therefore at a "high energy state".  

As cement hydrates, it reverts to a state of lower energy.  The heat released during hydration is essentially the energy put into the cement when it was manufactured.  

Gail S. Kelley, P.E.