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建筑工程中,常用水泥、粉煤灰、铝粉、洗衣粉、水配制的加气混凝土作屋面保温层,使用这种材料,操作方便,发泡好,体轻,可以废物利用,降低工程造价。但如果忽视其施工方法,也会影响工程质量。近几年,我单位施工队承建的几栋楼,女儿墙相继开裂,部分平房的砖封檐开裂,外张几厘米。经分析认为是加气混凝土膨胀产生应力所致。我单位使用的粉煤灰含有大量未燃尽的小煤块(0.3～2.0厘米),配制加气混凝土时,这些小
In the construction project, aerated concrete made of cement, fly ash, aluminum powder, washing powder and water is used as the roof insulation layer. The use of this material makes it easy to operate, has good foaming, light weight, can be used for waste, and reduces the construction cost. . However, neglecting its construction method will also affect the quality of the project. In recent years, several buildings under construction by our construction team have had their daughter walls cracked, and some of the bungalows have been cracked and cracked, with a few centimeters outside. The analysis was considered to be due to the stress caused by the expansion of the aerated concrete. The fly ash used by our company contains a large amount of unburnt small coal (0.3-2.0 cm), which are small when preparing aerated concrete.