Freezing and Thawing Resistance of Hardened Cement Paste Containing Blending Materials

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J. Korean Ceram. Soc. > Volume 27(3); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(3): 437.

혼합재를 사용한 시멘트경화체의 동결융해 저항성

이양수, 김정환, 최상흘¹, 한기성

인하대학교 요업공학과
¹한양대학교 무기재료공학과

Freezing and Thawing Resistance of Hardened Cement Paste Containing Blending Materials

ABSTRACT

The resistivity of cement paste and mortar for freezing and thawing was investigated for densifying the structure of cement paste and mortor, slag, diatomaceous earth and fly ash as blending materials and superplasticizer were used, and air entraining agent was added to absorb the volume expansion by freezing and thawing reaction. And then the specimens were subjected to freeze-thaw in water. When both of air entraining agent and superplasticizer as additives were mixed to specimens, their freeze-thaw resistance was enhanced by the air entraining effect and the water reduction effect. When 4% of slag were added to cement, freeze-thaw resistance was especially excellent. In addition, it was found that the specimens with blending materials were more influenced by curing periods than those without admixture. It is assumed that the curing periods contribute to exibit the potential hydraulicity and pozzolanic reactivity of blending materials and to densify their texture.