CONCRETE INCLUDING MGO POWDER AND HAVING LONG-TERM EXPANSIBILITY

摘要

PURPOSE: A long-term expansive concrete is provided to ensure high expansibility without concrete strength and fluidity reduction by mixing a certain amount of MgO powder. CONSTITUTION: A long-term expansive concrete contains 3-5% of magnesium oxide(MgO) powder based on unit mass of cement. The concrete has 10MPa-40MP of compressive strength. The concrete is cured at 20-40C. The concrete having over 40MPa of compressive strength is cured at 20-40C.