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混凝土中的水泥在水化过程中放热使混凝土温度升高,造成混凝土体积膨胀,当放热减少会造成混凝土体积减小,这样一来就形成了混凝土内部的温度应力。当温度应力超过混凝土抗拉抗剪强度时会产生裂缝,轻者降低混凝土的使用性和耐久性,严重时将影响混凝土的结构及使用安全。文章对大体积混凝土裂缝及温度应力进行了研究。
Concrete in the hydration of cement in the process of exothermic heat of the concrete temperature, resulting in concrete volume expansion, when the exotherm will reduce the volume of concrete will be reduced, thus forming the concrete internal temperature stress. When the temperature stress exceeds the tensile shear strength of concrete cracks will occur, the lighter reduces the usability and durability of concrete, will seriously affect the structure and safety of concrete. The article has carried on the research to the mass concrete crack and the temperature stress.