CEMENTITIOUS COMPOSITIONS WITH ACCELERATED CURING AT LOW TEMPERATURES: Fid-Bau Portal

CEMENTITIOUS COMPOSITIONS WITH ACCELERATED CURING AT LOW TEMPERATURES

LUCERO ANDREA / CADER MOHAMED / ALVES DOS SANTOS FLAVIANE

The invention relates to cementitious compositions with accelerated curing at low temperatures particularly at temperatures <5 DEG C, especially at temperatures <0 DEG C. The cementitious composition consists of 2 components with a first component A comprising at least one ordinary Portland cement (OPC), at least one cement selected from calcium aluminate cement (CAC) and/or calcium sulfoaluminate cement (CSA), a powder P, selected from the group consisting of carbonates or hydrogen carbonates of alkali and/or alkaline earth metals, optionally aggregates, optionally other additives and a second component B comprising at least one accelerator, an anti-freeze agent, water, and optionally other additives. Composition of the present invention show increased development of compressive strength, maintain good workability, and have particularly low shrinkage, also when cured at temperatures <5 DEG C, especially <0 DEG C, and as low as -10 DEG C.

本发明涉及一种具有在低温下，特别是在<5℃的温度、尤其是在<0℃的温度下加速固化的水泥基组合物。该水泥基组合物由具有第一组分A和第二组分B的两组分组成，所述第一组分A包含少一种普通波特兰水泥(OPC)、至少一种选自铝酸钙水泥(CAC)和/或硫铝酸钙水泥(CSA)的水泥、选自碱金属和/或碱土金属的碳酸盐或碳酸氢盐的粉末P、任选地集料、任选地其它添加剂，和所述组分B包含至少一种促进剂、防冻剂、水和任选地其它添加剂。本发明的组合物当在<5℃固化、尤其<0℃和低至‑10℃的温度下固化时显示了增加的压缩强度进展，保持了良好的可加工性和具有特别低的收缩率。

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