This course has been discontinued.
About 90% of the surface area of a masonry wall consists of concrete masonry units, with mortar joints making up the remaining. Both concrete and mortar are porous materials and, hence, can permit the passage of water through them. Therefore, a water-repellent masonry system should prevent the entry of water through both the concrete masonry units and the mortar joints.
This 2-hour interactive online course provides the details of achieving water-repellency and efflorescence control in masonry construction. While the focus is on single-wythe masonry walls, the admixture technologies presented are applicable to other manufactured concrete products such as pavers and roof tiles.