Abstract
In this paper, the properties of an expansive agent (CaO-CaS $O_4$) for dry shrinkage compensation were investigated by a series of experimental program, which might be used at On-Dol heating system as mortar type. The expansion principle of the CaO-CaS $O_4$ was mainly verified. As a result of this study, the correlation between the content of the expansive agent and the compressive strength was obtained in the form of exponential function(Y = A $e^{-x}$), showing that as the content of expansive agent increased as the expansion performance with the compressive strength increased by only a certain amount. Also, as a results of the analysis of a correlation between the expansive performance and the chemical properties which generally accompanied a part of quality management in manufacturing the expensive cement, the expansive performance was relative to only the contents of the F-CaO among chemical properties(Blaine, +44$\mu\textrm{m}$R, F-CaO, S $O_3$,L.O.I). And it was clarified that the results were relative to the second order function, showing that if the contents of the F-CaO increased the expansive performance Increased.d.
본 연구에서는 온돌바닥 모르터에서 쉽게 발생하는 균열을 저감시키기 위해 사용되는 팽창재 중에서 석회-석고계 팽창재의 품질 특성에 대한 연구결과이다. 본 연구는 팽창재 함량별 배합조건을 설정하여, 석회-석고계의 팽창원리를 실험적으로 검증하여 보았고, 배합조건에 따른 팽창성능을 길이변화율 실험결과로부터 분석하였다. 실험결과 팽창성능을 증가시키면 압축강도는 지수함수적(Y = A $e^{-x}$)으로 감소함을 확인하였다. 또한 팽창시멘트 제조시 품질관리의 일환으로 실시하는 화학성분치와 팽창성능과의 회귀 분석 결과, 화학성분치(분말도, +44$\mu\textrm{m}$R, F-CaO, S $O_3$, L.0.1) 중에서 F-CaO 함량이 팽창성능에 영향을 미치는 주요인자인 것으로 분석되었고, F-CaO함량이 증가하면 팽창성능도 증가하며 2차 함수 관계를 갖는 것으로 분석되었다.다.
