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一、概述混凝土怍为一种建筑材料,在一些重要的技术性能上已获得发展,如在短期或长期硬化过程中的强度、抗渗性、耐化学物理侵蚀性等。许多使用部门,尤其是构件预制工业和混凝土制品生产企业提出了这样的任务,即缩短早期混凝土的硬结时间,以尽快地达到运输或其它施工作业所要求的强度。它可以按下列原则用不同的方法获得:使用早强水泥;减小水灰比;采用加热措施;掺入外加剂。对于上述一些方法,不论是单独使用或综
I. Overview Concrete concrete is a kind of building material and has been developed in some important technical performances, such as strength, impermeability, chemical and physical corrosion resistance in the short-term or long-term hardening process. Many use departments, especially component prefabrication industries and concrete product manufacturers, have proposed the task of shortening the hardened time of early concrete to achieve the required strength for transportation or other construction work as quickly as possible. It can be obtained in different ways according to the following principles: use of early-strength cement; reduction of water-cement ratio; use of heating measures; incorporation of admixtures. For some of the above methods, either alone or in combination