近年来,有些地方(如沈阳、哈尔滨等地)在应用加气混凝土屋面板的工程中,出现了板材下保护层脱落的现象(见图1),毁物伤人的情况时有发生。脱落面积不等,大多将受拉主筋全部暴露(一般并不向深部发展),或使板材塌陷,虽可采取修补措施,但难以确保其正常的安全度,更难保证修补部分不再继续脱落。此类事故性质严重,对工程质量影响很大,使加气混凝土声誉遭受不应有的损害,如不再引起有关方面 In recent years, in some places (such as Shenyang and Harbin), under the application of aerated concrete roofing panels, there has been a phenomenon that the protective layer underneath the plate falls off (see Fig. 1). The situation of damage and injury is frequent. Excluding the area is not equal, most of the exposed bar tendrils are all exposed (usually do not develop to the deep), or the plate collapses, although repair measures can be taken, but it is difficult to ensure its normal safety, it is even more difficult to ensure that the repair part will not continue to fall off . Such accidents are of a serious nature and have a great impact on the quality of the project, causing undue damage to the reputation of the aerated concrete, such as no longer causing relevant aspects.