混凝土是一种由砂石骨料、水泥、水及其他外加材料混合而成的非均质脆性材料

混凝土是一种由砂石骨料、水泥、水及其他外加材料混合而成的非均质脆性材料。由于由于混凝土施工、本身变形和约束等一系列问题，使混凝土裂缝成了土木、水利、桥梁、隧道等工程中最常见的工程病害。硬化成型的混凝土中存在着众多的微孔隙、气穴和微裂缝，正是由于这些初混凝土建筑和构件通常都是带缝工作的，由于裂缝的存在和发展通常会使内部的钢筋等材料产生腐蚀，降低钢筋混凝土材料的承载能力、耐久性及抗渗能力，影响建筑物的外观、使用寿命，严重的将威胁到人民的生命、财产。

Concrete is a kind of heterogeneous brittle material composed of sand and gravel aggregate, cement, water and other additional materials. Due to a series of problems such as concrete construction, its own deformation and constraints, concrete cracks have become the most common engineering diseases in civil engineering, water conservancy, bridges, tunnels and other projects. There are many micro pores, air pockets and micro cracks in hardened concrete. It is precisely because these initial concrete buildings and components usually work with joints. The existence and development of cracks will usually corrode the internal reinforcement and other materials, reduce the bearing capacity, durability and impermeability of reinforced concrete materials, and affect the appearance and service life of buildings, Serious will threaten people's lives and property.

Concrete is a kind of heterogeneous brittle material, which is composed of sand aggregate, cement, water and other external materials. Due to a series of problems such as concrete construction, deformation and constraint, concrete cracks have become the most common engineering diseases in civil engineering, water conservancy, bridges, tunnels and other projects. There are many micro-pores, air pockets and micro-cracks in hardened concrete. It is precisely because these initial concrete buildings and components usually work with cracks. Because of the existence and development of cracks, the internal reinforcement and other materials usually corrode, reducing the bearing capacity, durability and impermeability of reinforced concrete materials, affecting the appearance and service life of buildings, and seriously threatening people's lives and property.