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加气混凝土墙体由于以下四个原因最容易遭到破坏: 1.冻融作用:加气混凝土在冻融作用下有两个弱点:一是经过几次冻融后表面开始明显裂纹、剥落,并随循环次数的增加而发展;二是其局部抗冻性比整体抗冻性差,破坏现象较为严重。 2.盐析作用:加气制品含有可溶性盐和碱,析盐现象较严重。当制品处于干燥状态时,其盐分和碱分呈结晶状态,并相对稳定。但当室温和湿度大于室外时,就会形成蒸汽压力差,致使室内湿汽不断透过墙身向外散发。水分迁移的过程能溶解盐分并将其
Aerated concrete walls are most vulnerable to destruction for the following four reasons: 1. Freeze-thaw effects: Aerated concrete has two weaknesses under freezing and thawing: First, after several freeze-thaw cycles, the surface begins to show obvious cracks and flaking. And with the increase in the number of cycles and development; Second, the local frost resistance is worse than the overall frost resistance, damage is more serious. 2. Salting-out effect: Air-entraining products contain soluble salts and alkalis, and salt precipitation is more serious. When the product is in a dry state, its salt and alkali are in a crystalline state and relatively stable. However, when the room temperature and humidity are greater than those in the outdoors, a vapor pressure difference is formed, so that the indoor moisture vapor is continuously emitted through the wall. The process of water migration can dissolve salt and