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在工程建设中混凝土施工占有很大比例,是施工的重要环节,但有时混凝土会出现裂缝现象,造成不良影响,是应该积极预防的。混凝土中产生裂缝原因有多种,主要是温度和湿度的变化,混凝土的脆性和不均匀性,以及原材料不合格、结构不合理、模板变形、基础不均匀沉降等。实践证明,混凝土常见的裂缝,多数是不同深度的表面裂缝,其主要原因是温度梯度造成,寒冷地区的温度骤降也容易造成裂缝,因此说混凝土
In engineering construction occupies a large proportion of concrete construction is an important part of the construction, but sometimes there will be cracks in concrete, causing adverse effects, it should be actively prevented. Cracks generated in concrete for many reasons, mainly changes in temperature and humidity, concrete brittleness and inhomogeneity, as well as unqualified raw materials, the structure is not reasonable, the template deformation, the basis of uneven settlement. Practice has proved that the common concrete cracks, most of the surface cracks of different depths, the main reason is the temperature gradient caused by the sudden drop in temperature in cold areas are also likely to cause cracks, so that the concrete