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AssigneesMoon Han Kim, Jeong Hwan Kwak
InventorsMoon Han Kim, Hey Zoo Hwang, Jung Ha Hwang, Hee Sung Cha, Kwang Choon Kim, Jong Kuk Lee
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The activated kaolin powder compound is prepared from naturally-existing kaolin (hereinafter "natural kaolin"). The activated kaolin powder compound is prepared by heating natural kaolin to 480.degree. C. within at most one hour, calcinating the heated kaolin at high temperature by heating to 980.degree. C. over at least one hour, quenching the calcinated kaolin with water or air, and pulverizing the quenched kaolin to give particle sizes of 2 .mu.m or less. The activated kaolin powder compound is employed in an amount of about 5 to 15% by weight of cement for preparing mortar or cement. The cement composition containing the activated kaolin powder compound can provide a mortar or concrete having superior properties in compressive strength, flexural strength and water permeability.
A method of preparing an activated kaolin powder compound for mixing with cement, which comprises;
An activated kaolin powder compound for mixing with cement for preparing mortar or concrete, having particle sizes of 2 .mu.m or less and a specific gravity of about 1.5 to 3.0, which is prepared by heating natural kaolin to 480.degree. C. for a time period up to one hour, calcinating the heated natural kaolin at high temperature by heating up to 980.degree. C. over at least one hour, quenching the calcinated kaolin to form the activated kaolin powder, and pulverizing the quenched activated kaolin powder.
A cement composition for preparing mortar or concrete, which comprises:
A method for preparing a cement composition comprising:
Dependencies are inferred from the claim text.