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1 问题的提出 建筑砂浆作为大宗建材在建筑工程中发挥着极其重要的作用,按组份可分为水泥石灰混合砂浆(简称混合砂浆)和水泥砂浆。由于混合砂浆加入了石灰膏,砂浆柔软、保水、易操作,但同时也带来了砂浆硬化后不耐水、收缩大、粘结力低等弊病,并且石灰膏本身含水50％,呈膏状,计量十分困难,砂浆质量难以控制,粉刷层的渗漏裂等质量通病也最易在混合砂浆中发生。因此,有关规范规定工程±0.0m以下
1 Problem Proposal Building mortar as a bulk building material plays an extremely important role in the construction project, and can be divided into cement-lime-mixed mortar (abbreviated as mixed mortar) and cement mortar. As the mortar is mixed with lime paste, the mortar is soft, water-retaining, and easy to operate, but at the same time it also brings the disadvantages of not being resistant to water, shrinkage, and low cohesion after the mortar is hardened, and the lime paste itself contains 50% water and is in a paste form. The measurement is very difficult, the quality of mortar is difficult to control, and the common problems such as seepage cracking of the stucco layer are also most likely to occur in the mixed mortar. Therefore, relevant regulations stipulate that the engineering is less than ±0.0m.