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RE: wet masonry

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Really?  I would say the opposite - you want the masonry units to be dry, except perhaps a light spray in hot, dry climates.  One reason you don't need to limit water content of mortar and grout is that the masonry units will absorb some of the water, reducing the effective water/cement ratio and improving the quality of the mortar/grout.
Furthermore, you want dry units to minimize drying shrinkage after placement.
But I believe that the question is "how do you define what is a dry unit vs a wet unit"?  I would say that a unit that is moist on the surface due to rain or that shows dark spots due to moisture absorption likely would be a "wet unit"?
Bill Sherman

From: Richard L. Hess [mailto:RLHess(--nospam--at)]
Sent: Tuesday, August 19, 2008 3:58 PM
To: seaint(--nospam--at)
Subject: RE: wet masonry

If the masonry units are dry they will absorb all of the water from the mortar and prevent bonding.  The amount of wetting depends on their porosity.  For concrete masonry units it takes soaking rather than just spraying some water on them.
Richard Hess, S.E.
Los Alamitos, CA
-----Original Message-----
From: Jnapd(--nospam--at) [mailto:Jnapd(--nospam--at)]
Sent: Tuesday, August 19, 2008 12:54 PM
To: seaint(--nospam--at)
Subject: Re: wet masonry

Some persons would soak the blocks in water for whatever they thought was appropriate amount of time before they would construct the wall.
Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA
In a message dated 8/19/2008 12:44:58 P.M. Pacific Daylight Time, domdean(--nospam--at) writes:
Does anyone know where I can find a definition of "wet masonry"? The project specifications state (under Quality Assurance) "Do not lay units that are wet or frozen." I've checked the Specification for Masonry Structures and could not find anything. 

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