Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Curing Temperature on Hydration of Calcium Aluminate Cement–Calcium Sulfate–Limestone System
The effect of curing temperature on hydration of a ternary blend of calcium aluminate cement (CAC), calcium sulfate (C$), and limestone (Cc) was examined. Compressive strength was evaluated at 1, 7, and 28 days. Hydration kinetics and products were assessed using calorimetry, thermogravimetric analysis, and X-ray powder diffraction. It was found that elevating the curing temperature from 5 to 50°C accelerated cement hydration. At 5 and 23°C, the incorporation of limestone caused a transformation of monosulfoaluminate into monocarboaluminate in the hydration product at 28 days. Higher curing temperatures (35–50°C), however, resulted in a collective increase in monosulfoaluminate, monocarboaluminate, and aluminum hydroxide, and led to a significant reduction in ettringite. Higher curing temperatures also led to an increase in aluminium hydroxide but did not form as much hydrogarnet () in the CAC-C$-Cc system as in the CAC-C$ system. This study provides a technical reference for practical design of materials based on the ternary binder system.
Effect of Curing Temperature on Hydration of Calcium Aluminate Cement–Calcium Sulfate–Limestone System
The effect of curing temperature on hydration of a ternary blend of calcium aluminate cement (CAC), calcium sulfate (C$), and limestone (Cc) was examined. Compressive strength was evaluated at 1, 7, and 28 days. Hydration kinetics and products were assessed using calorimetry, thermogravimetric analysis, and X-ray powder diffraction. It was found that elevating the curing temperature from 5 to 50°C accelerated cement hydration. At 5 and 23°C, the incorporation of limestone caused a transformation of monosulfoaluminate into monocarboaluminate in the hydration product at 28 days. Higher curing temperatures (35–50°C), however, resulted in a collective increase in monosulfoaluminate, monocarboaluminate, and aluminum hydroxide, and led to a significant reduction in ettringite. Higher curing temperatures also led to an increase in aluminium hydroxide but did not form as much hydrogarnet () in the CAC-C$-Cc system as in the CAC-C$ system. This study provides a technical reference for practical design of materials based on the ternary binder system.
Effect of Curing Temperature on Hydration of Calcium Aluminate Cement–Calcium Sulfate–Limestone System
Zhang, Duo (Autor:in) / Cai, Xinhua (Autor:in) / Hu, Lingling (Autor:in)
19.06.2018
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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