CEMENT COMPOSITION FOR PRETENTIONED SPUN HIGH STRENGTH CONCRETE PILE AND CONCRETE COMPOSITION INCLUDING THE SAME

摘要

In the present invention, disclosed is a concrete composition, which is allowed to manufacture an optimal cement mixture for high strong PHC pile and high strong PHC pile without a curing process under high pressure and temperature by using a first type Portland cement, industrial byproducts and fine powder binders wherein the cement mixture for prestressed concrete (PHC) comprises 20-50 wt% of the first type Portland cement; 40-65 wt% of granulated blast furnace slag; and 5-15 wt% of fine powder binders wherein the concrete for the PHC comprises 540-650 kg/m^3 of the cement mixture; 110-130 kg/m^3 of water; 563-800 kg/m^3 of fine aggregates; 1,020-1,296 kg/m^3 of thick aggregates; and 6.5-16.3 kg/m^3 of chemical admixture.