(一) 混凝土房屋外墙板是建造房屋所必需的。它应具有:承受荷载、隔热保温、耐冻抗渗等功能。为了实现这些功能,有许多途径可达到,如采用高标号(或特殊品种)水泥;增加水泥用量;改进工艺条件(如改进搅拌和振捣方法);调整养护制度;采用掺入外加剂方法等。这几种方案虽然都可以实 (a) Concrete house exterior wall panels are necessary to build houses. It should have: bear load, insulation, frost resistance and other functions. In order to achieve these functions, there are many ways to achieve, such as the use of high-grade (or special varieties) cement; increase the amount of cement; improve the process conditions (such as improved mixing and vibrating method); adjust the curing system; . Although these kinds of programs can be real