LONG-TERM EXPANSIBLE CONCRETE CONTAINING MAGNESIUM OXIDE(MgO) WHICH IS ABLT TO EFFECTIVELY PREVENT CRACK BY CONCREATE SHRINKAGE

摘要

PURPOSE: A long term expansible concrete containing magnesium oxide is provided to obtain long term expansion without reduction of concrete strength and fluidity.;CONSTITUTION: A long term expansible concrete contains 3-5% of magnesium oxide(MgO) powder based on cement unit mass. MgO powder is plasticized at 800-1200°C. The concrete has more than 10MPa and less than 20MPa of compression strength and is cured at 20-40°C.;COPYRIGHT KIPO 2010