混凝土裂缝多数发现施工阶段,其原因复杂多变,一般可分为微裂缝和宏观裂缝两大类,微观裂缝是指肉眼看不到的,混凝土内部固有的一种裂缝,荷载不超过设计规定的条件下,一般视为无害,宏观裂缝宽度在0.05毫米以上,并且认为宽度小于0.2-0.3mm的裂缝是无害的,前提是裂缝不再扩展,为最终宽度。 Most cracks found in the construction phase of the concrete, the reasons for the complex and ever-changing, generally divided into micro-cracks and macro-cracks two categories, micro-cracks refers to the naked eye can not see, a concrete internal cracks, the load does not exceed the design requirements Generally considered harmless, macroscopic fracture widths above 0.05 mm, and cracks of less than 0.2-0.3 mm in width are considered harmless provided that the fracture no longer expands to the final width.