화학공학소재연구정보센터
Journal of the Korean Industrial and Engineering Chemistry, Vol.3, No.1, 148-155, March, 1992
ASPHALT와 CARBON BLACK으로 처리된 고내구성 포틀랜드시멘트의 수화특성
The Hydration Characteristics of High-Durable Portland Cement Treated with Asphalt and Carbon Black
초록
콘크리트의 내구성을 향상시키는 기존의 공법과는 다르게, 시멘트 입자 표면에 아스팔트 벽을 부분적으로 형성시킨 후 카본블랙을 처리하여 콘크리트의 전반적인 내구성을 현격히 향상시킨 고내구성 포틀랜드시멘트(ACTPC)의 수화반응 특성을 X-Ray, SEM, 전도열량계 등을 사용하여 조사한 결과는 다음과 같다. ACTPC가 물과 접촉하면 발수성을 나타내는 아스팔트 벽은 시멘트 입자와 물의 접촉 및 시멘트 입자로부터 각종 이온들의 용출을 방해하여 초기 수화반응이 억제되지만, 카본블랙은 결정핵 역할을 하므로 일정기간이후의 수화반응을 촉진한다.
For the enhancement of the concrete durability, we developed high - durable portland cement (ACTPC) by physical treatment of ordinary portland cement with asphalt and carbon black. In this research, the hydration reaction characteristics of ACTPC were studied by using SEM, X-Ray, Conduction Micro Calolimeter etc. When the ACTPC is mixed with water, it is believed the asphalt films on cement particles suppress the early stage of hydration reactions of cements, because the films hinder the contact with water and the elusion of soluble ions from particles. But the carbon blacks on the cement particles accelerated the hydration reactions of cement after a while, because the micro particles can be used as seed crystals in CaO-SiO2-H2O gel formation.
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