由于混凝土施工和本身变形、约束等一系列问题,硬化成型的混凝土中存在着众多的微孔隙、气穴和微裂缝,正是由于这些初始缺陷的存在才使混凝土呈现出一些非均质的特性。微裂缝通常是一种无害裂缝,对混凝土的承重、防渗及其他一些使用功能不产生危害。但是在混凝土受到荷载、温差等作用之后,微裂缝就会不断的扩展和连通,最终形成我们肉眼可见的宏观裂缝,也就是混凝土工程中常说的裂缝。 Due to a series of problems such as concrete construction and its deformation and constraint, there are many micro-pores, air pockets and micro-cracks in the hardened concrete. It is precisely because of these initial defects that the concrete presents some non-homogeneous characteristics. . Micro-cracks are usually a kind of non-hazardous cracks, which do not harm the concrete’s weight bearing, seepage prevention and other functions. However, after the concrete is subjected to loads, temperature differences, etc., the micro-cracks will continue to expand and communicate, eventually forming macroscopic cracks that are visible to the naked eye, which are often referred to as cracks in concrete works.