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Re: Concrete PH question

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The ph levels and moisture content will dissipate over time.  Coating manufacturer's make primers to handle a higher ph surface, which will be the most straight forward approach.  I would not alter the mix design to address this problem.

----- Original Message -----
From: "Stuart, Matthew"
To: seaint(--nospam--at)
Subject: Concrete PH question
Date: Fri, 25 May 2007 11:30:18 -0400

A ready mix supplier as submitted a tilt-up concrete mix that will provide a PH of about 12.5 to 13.


The painting sub-contractor will not warranty his work for a PH above 10.


Any suggestions from the tilt-up experts out there as to what admixtures or cementitious substitutes could be used to reduce the mix PH or a paint product that is not susceptible to concrete PH above 10?


D. Matthew Stuart, P.E., S.E., F.ASCE, SECB

Senior Project Manager

Structural Department


Schoor DePalma Engineers and Consultants

200 State Highway Nine

Manalapan, NJ 07726

732-577-9000 (Ext. 1283)

908-309-8657 (Cell)

732-298-9441 (Fax)



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