随着“四化”建设的日益发展,人们根据“四化”的需要对水泥面的性能提出了越来越多的要求:例如:地下工程,人防工程、隧道矿山的喷砼具有速凝性,抢修国防井下工程等等……并有不同的施工工艺,为满足这些工艺的要求,从不同途径中人们做了大量的研究和试验工作,采用化学外加剂是改善砼性能的最有效方法。而大多数建筑工程要 With the development of “Four Modernizations”, more and more requirements have been put forward on the performance of cement surface according to the needs of “four modernizations”: for example, underground engineering, civil air defense projects and sprayed concrete of tunnel mines With quick-setting, repair national defense underground engineering and so on ... ... and have different construction techniques, in order to meet the requirements of these processes, from different ways people have done a lot of research and experimental work, the use of chemical additives is to improve the performance of concrete The most effective way. Most construction projects are needed