室内抹灰如出现顶棚、墙面裂缝,经处理后,过了几天,裂缝又出现了,怎么办?现介绍一种用建筑石膏进行裂缝处理的方法。建筑石膏是一种气硬性胶结材料,凝结硬化快,一般3～5分钟达到初凝,30分钟达到终凝。凝结初期有轻微膨胀,不收缩,膨胀率为0.5%～1%。 If there are ceilings and wall cracks in the interior plastering, after the treatment, the cracks will appear again after a few days. What is the solution? A method for treating cracks with building plaster is introduced. Building gypsum is a kind of air-hardening cement material, which is quick to set and harden. Generally it takes 3 to 5 minutes to reach initial setting and 30 minutes to final setting. In the initial stage of condensation, there is slight expansion without shrinkage, and the expansion rate is 0.5% to 1%.