预制构件采用蒸气养护的方法可较快地达到设计强度,在我国已有三十多年的历史了。但是同样一个构件由于养护设施和养护方法的不同,所用蒸气量出入很大。据闻有的构件厂蒸养1m构件所用蒸气达到1000kg以上,有的构件厂则只要200kg左右。本刊1986年第1期曾刊有“养护技术改造试验”,对预制构件养护坑的7种湿热养护方法进行了对比试验,所得结果以低温养护的方法最节省蒸气。但是采用40℃低温养护 Prefabricated components can reach the design intensity quickly with the steam curing method, which has been in China for more than 30 years. However, due to the difference in maintenance facilities and maintenance methods, the same component has a large amount of steam. It has been reported that some component plants will steam more than 1,000kg of steam for 1m components, and some component factories will only need about 200kg. In the first issue of the 1986 issue of the “Restoration of Maintenance Technology”, a comparative experiment was conducted on the seven types of moist heat conservation methods for prefabricated component conservation pits, and the results obtained were the most economical in terms of low temperature maintenance. However, the use of low temperature curing 40 °C