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Integral water repellent admixtures have played an important role in improving performance of architectural concrete block by minimizing penetration of water into the concrete block wall. The ASTM E 514-90 Test Method for Water Penetration and Leakage through Masonry is commonly used to measure the performance of unit masonry subjected to a 4 hour simulated wind-driven rain. A laboratory test program was conducted to evaluate the effectiveness of the ASTM E 514-90 test method in determining performance of walls constructed with materials which contain integral water repellent admixtures, to determine the effect of extending the test period from 4 hours up to 72 hours and to compare the performance of four different integral water repellent admixtures.
Suggestions are made regarding potential modifications that can be made to the E 514-90 test in order to effectively evaluate the performance of walls constructed with concrete masonry units and mortar which contain an integral water repellent admixture.
water penetration, leakage, leaks, permeance, permeability, integral water repellent admixture, concrete masonry
Technical Supervisor, W. R. Grace & Co. - Conn., Cambridge, MA
Operations Manager, Forrer Unit of W. R. Grace & Co., - Conn., Milwaukee, WI