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Title |
Experimental Study on the Early Strength Development Mechanism of Cement Paste Using Hardening Accelerator and High-Early-Strength Cement
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Keywords |
시멘트 수화반응 ; 경화촉진제 ; 조강시멘트 ; 미세분석 ; 조기강도 Cement hydration ; Hardening accelerator ; High early strength cement ; Microanalysis ; High-early-strength |
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Abstract |
The purpose of study is to analyze mechanism with early high portland cement and hardening accelerator. As the result, it was concluded that hardening accelerator makes accelerates appearance of Ca(OH)2 through experiment using TG-DTA when it hydrates with cement. On the result of compressive strength, as increasing the amount of hardening accelerator used, early compressive strength was improved. Also, as a result of hydration heat, hardening accelerator accelerates hydration of C3S that is cement's component. On the result of XRD's analyzation, hydration product for each age could be check and it was shown that as increasing 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 hardening accelerator. Therefore hardening accelerator used on this study is effective on getting early compressive strength.
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