경화촉진제와 조강시멘트를 사용한 시멘트 페이스트의 조기강도 발현 메커니즘에 관한 실험적 연구
Experimental Study on the Early Strength Development Mechanism of Cement Paste Using Hardening Accelerator and High-Early-Strength Cement
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초록
본 연구는 조강시멘트와 경화촉진제를 사용하여 조기강도 발현의 메커니즘을 분석하는 것이 목적이다. 연구결과 경화촉진제는 시멘트와의 수화반응시 Ca(OH)2의 촉진시키는 것을 TG/DTA 실험을 통하여 검정하였다. 압축강도 측정결과 경화촉진제의 사용량이 증가 할수록초기압축강도가 증가하는 것을 알 수 있었다. 또한 미소수화열 측정결과 경화촉진제는 시멘트의 성분중 C3S의 수화반응을 촉진시키는 것으로 나타났다. XRD분석결과 재령별 수화생성물을 확인할 수 있었으며 경화촉진제의 사용량이 증가할수록 수화물들의 피크점이 높게 나타나는 것을 알 수 있었다. SEM찰영을 한 결과 촉진제의 첨가량에 따라 Ca(OH)2의 생성과 재령에 따라 C-S-H의 형상을 관찰할 수 있었다. 따라서 본 연구에서 사용된 경화촉진제는 초기강도발현 시키는 것에 대해 효과적인 것을 확인 할 수 있었다.
Abstract
The purpose of study is to analyze mechanism with early high portland cement and hardening accelerator. As the result, it wasconcluded that hardening accelerator makes accelerates appearance of Ca(OH)2 through experiment using TG-DTA when it hydrateswith cement. On the result of compressive strength, as increasing the amount of hardening accelerator used, early compressivestrength was improved. Also, as a result of hydration heat, hardening accelerator accelerates hydration of C3S that is cement’scomponent. On the result of XRD’s analyzation, hydration product for each age could be check and it was shown that asincreasing the amount of hardening accelerator used, peak point of hydration product was recorded high. As the result of SEM,appearance of C-S-H was shown as the amount of Ca(OH)2’s appearance and each age according to additive contents of hardeningaccelerator. Therefore hardening accelerator used on this study is effective on getting early compressive strength.
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