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在施工中,有些材料洒在混凝土上或与混凝土接触时,就会使混凝土被污染。本文讨论通过某些方法去清除混凝土的污染,使被污染的混凝土恢复原状。用肥皂水能够清除某些污染,若使用某种溶剂时需要严格计量。在清除中,还必须使用一些特殊方法使清除剂不被混凝土吸收,同时,不让污染物渗入混凝土深层。在施工的混凝土表面涂上敷剂,污染问题就能得到解决。这类敷剂是由惰性细粉拌合而成,如硅粉、硅酸盐水泥、硅藻土、粉煤灰、漂土、石灰石粉、熟石灰和白粉等。把以上材料敷在一块布上,放在施工中易出现污染的区域。地板油吸收剂和各种干草也可以做敷剂材料。若以上材料混合使用时会产生化学反应,就禁止使用。下面列出了常常遇到的污染情况,鉴定手段和清除方法。铁锈污染
In construction, some materials will be contaminated when they are sprinkled on concrete or contacted with concrete. This article discusses the removal of concrete contamination through certain methods to restore the contaminated concrete to its original condition. Some of the contamination can be removed with soapy water, and strict measurement is required when using a certain solvent. In the removal, special methods must also be used to prevent the scavenger from being absorbed by the concrete, and at the same time, to prevent contaminants from penetrating deeper into the concrete. Applying a coating agent on the surface of the construction concrete can solve the problem of pollution. This type of cataplasm is made by mixing inert fine powders such as silica fume, portland cement, diatomaceous earth, fly ash, bleaching earth, limestone powder, slaked lime and white powder. Put the above materials on a piece of cloth and place it in areas where contamination may occur during construction. Floor oil absorbents and various hay can also be applied as a dressing material. If a chemical reaction occurs when these materials are used together, they are prohibited from use. Listed below are the frequently encountered contamination conditions, identification methods and removal methods. Rust pollution