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RE: Grouting CMU walls

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The standard detail which my former boss used doesn't really address your
particular concern, i.e. when to start placing block after placing a lift of
grout.  The Portland Cement Association has a publication titled
"Cementitious Grouts and Grouting" as well as a Concrete Masonry Handbook.
You may find your answers in these publications.  Their web site is
www.portcement.org.  Sorry I can't be of more help.

Albert J. Meyer, Jr., P.E.
Martin Engineering
(215) 665-8570 Tel
(215) 561-5064 Fax
ameyer(--nospam--at)martinaia.com


-----Original Message-----
From: Lynn H [mailto:lhoward(--nospam--at)silcom.com]
Sent: Wednesday, January 23, 2002 9:41 AM
To: seaint(--nospam--at)seaint.org
Subject: Grouting CMU walls


I would like to solicit opinions as to how long the
concrete block sub-contractor should wait between
grouting one lift and starting to lay block for the
next lift.  My concern is that if the contractor
starts to lay block too soon, while the grout is
still in its plastic state, cracks could develop due
to workers bumping and hitting the wall (by accident
of course).

I can not find any recommendations in the Code in
this area.  Any opinions, and or any directions to
standards that there may exist would be appreciated.

Thanks

Lynn

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