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Concrete is non-homogeneous brittle materials made by gravel aggregate, cement, water and other materials. Due to concrete deformation, cracks are the common defect of civil engineering projects , water, bridges ,tunnels and other projects. It results in the corrosion of internal steel, reducing the reinforced concrete materials bearing capacity, durability. It is the most serious threat to people's lives and property.
一、The type and causes of concrete crack：
From the micro-perspective, concrete is heterogeneous combination composed of cement, sand, stone, air, water ,due to the different influence of composed materials ,micro-structure , concrete cracks are different: |
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