Studies on the High Strength Cement Hardened Body Blended by Industrial By-Products

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J. Korean Ceram. Soc. > Volume 31(12); 1994 > Article

Journal of the Korean Ceramic Society 1994;31(12): 1507.

산업 폐부산물을 혼합재로한 고강도 시멘트 경화체의 제조 및 특성분석

연영훈, 최상흘¹

한양대학교 무기재료공학과
¹부산대학교 무기재료공학과

Studies on the High Strength Cement Hardened Body Blended by Industrial By-Products

ABSTRACT

High strength cement hardened body was prepared by ordinary portland cement, silica-fume, super-plasticizer and the industrial by-product powder such as tailing, paper sludge ash and granulated slag. These raw materials were mixed and formed with w/c=0.18. The cement hardened body is cured in the autoclave at 18$0^{circ}C$, 10atm. These admixtures made the compressive strength of all specimens develope by 170~230%. The highest compressive strength could be obtained by 236 MPa when mix composition was 14 wt% of silica-fume and 26 wt% of granulated slag. The compressive strength increased with decreasing the average pore size and the amount of the poe over the size of 50 nm by which the appearance of high compressive strength of the cement hardened body were mainly influenced. In the result, the hydration products were C-S-H, tobermorite and ettringite and it was realized that the reason why the cement hardened body became dense and revealed the higher strength was that those hydrates were formed inside of the pore and filled in it and the unhydrated materials played the role of an inner-filler.