【摘 要】
：
Calcium sulfoaluminate (CSA) cements, that require less energy and produce less CO2 than Portland cement during their manufacture, are receiving increasing attention in the context of sustainable deve
【机 构】
：
CEA, DEN, DTCD, SPDE, F-30207 Bagnols-sur-Cèze, France
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
Calcium sulfoaluminate (CSA) cements, that require less energy and produce less CO2 than Portland cement during their manufacture, are receiving increasing attention in the context of sustainable development.Moreover,by increasing their gypsum content, a wide series of materials can be designed, ranging from rapid-hardening to shrinkage compensating, and eventually to self-stressing.CSA cements have been used in China in a wide range of general construction.Besides, due to the structural flexibility and sorption properties of some of their hydrates, CSA cements are of interest to stabilize hazardous wastes.Their setting time depends on their yeelimite content, the kind and content of minor phases and the amount and reactivity of the added calcium sulfate.In addition, admixtures may be useful to control the rate of hydration and fulfill the application requirements.This presentation is focused on the chemistry underlying the acceleration effect of lithium ions and the retardation effect of borate ions.
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