大体积混凝土温度效应及控制措施综述与展望

Review and Prospect of Temperature Effect and Control Measures for Mass Concrete

温度效应对大体积混凝土有着重要的影响,关系到混凝土结构的质量和安全。本文介绍了大体积混凝土水化反应机理以及水化热对混凝土力学性能的影响,综述了配合比、掺料、外加剂和保温混凝土对大体积混凝土水化反应的影响,总结了大体积混凝土的温控措施,并对保温混凝土的研究进展进行了概述。研究表明:选用合适掺料可以有效降低水化反应速率,减少水化热的产生,优化混凝土掺料和水灰比能够减少混凝土冻融损伤和表面裂缝,采取适当的温控措施能够提高混凝土浇筑质量。未来随着技术进步和材料性能提升,大体积混凝土将实现精细、高效、智能化温度控制。

The temperature effect has an important influence on mass concrete, which is related to the quality and safety of concrete structures. That was introduced the mechanism of hydration reaction of mass concrete and the effect of heat of hydration on the mechanical performance of concrete, and that was reviewed the effect of mix proportion, mineral admixture, chemical admixture and thermal insulation concrete on hydration reaction of mass concrete. The effective temperature control measures were summarized for mass concrete, and the research progress was overviewed of thermal insulation concrete. The research shows that: the appropriate admixtures can effectively reduce the rate of hydration reaction, reduce the generation of heat of hydration, optimization concrete admixtures and water-cement ratio can reduce concrete freeze-thaw damage and surface cracks, and adoption appropriate temperature control measures can improve the quality of concrete. In the future, as technology progresses and material performance improvement, the temperature control of mass concrete will be fine, efficient and intelligent.