VOLUME-STABLE HARDENED HYDRAULIC CEMENT

摘要

The hardened volume change of concrete, grout, patching material, and water-proof material made from blends of a calcium or aluminum sulfate compound, Portland cement and calcium aluminate cement can be reduced by using Portland cement containing low levels (2% maximum) of iron oxide. By lowering the normal level of iron oxide in the Portland cement used in the above composition, it was also discovered that the compressive strengths dramatically increase as well as the bonding capability of the composition to old or cured concrete.