| Abstract | The use of the small-panel test for leakage of brick masonry has been extended to study the change in leakage characteristics with time. During field visits in areas where the dry-press brick previously studied is extensively used, there were reports of leakage in newly constructed walls containing the bricks, which ceased after a period of a year. A common explanation for the increased resistance of the walls to rain penetration was that msall particles of dust and dirt, present in the air, were carried to and into the wall surface by wind and rain, therebly filling the small cracks and openings through which rain might enter. |
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