The Mortar Properties of Portland Cements Blended with Modified Coal Ashes

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J. Korean Ceram. Soc. > Volume 27(7); 1990 > Article

Journal of the Korean Ceramic Society 1990;27(7): 833.

가공된 석탄재를 사용한 석탄재혼합시멘트의 모르터 특성

홍원표, 노재성, 조헌영, 정수영¹, 김무한¹

충남대학교 공과대학 화학공학과
¹충남대학교 공과대학 건축공학과

The Mortar Properties of Portland Cements Blended with Modified Coal Ashes

ABSTRACT

For the development of multi-functional materials which has water reducing power, air entraining power and waterproofing power as well as blending additive in cement mortar the coal ash was modified with asphalt-stearic acid or asphalt-boiled oil mixtures by mechanical treatment. And the physical properties of cement mortar blended with modified coal ashes were compared with those of the water-tightness-cement mortar and the ordinary-portland-cement mortar added with AE.water reducing agent. The mortar of coalash-blend-cement modified with asphalt-stearic mixture was increased acid about 20% in initial strengths and decreased about 20% in water absorption ratio than those of ordinary coalash-blend-cement. The mortar of coalash-blend-cement modified with asphalt-bolied oil mixture was similar to the cement mortar added with AE.water reducing agent in water reduction ratio, air entraining conents and the initial strengths, also was similar to the water-tightness-cement mortar in water absorption and water permeability ratios.