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本文介绍了为降低某工程基础大体积混凝土由于温升效应引起的开裂风险所采取的技术措施。通过采用复合掺合料及自主研发的超缓凝高性能复合泵送剂,对混凝土配合比进行优化设计。试验最终确定的配合比满足混凝土的力学性能要求,并提高了混凝土的密实度,延缓了混凝土的早期温升,降低了混凝土的早期变形量。现场施工过程中实时监测了混凝土的温升及应变。监测结果显示,基础大体积混凝土的各项指标均满足相应规范的要求。
This paper introduces the technical measures taken to reduce the risk of cracking caused by the temperature rise effect of mass concrete in a certain project. Through the use of composite admixture and self-developed super-slow high-performance composite pumping agent, to optimize the design of concrete mix. The ratio of the final test to meet the mechanical properties of concrete requirements, and improve the density of concrete, delay the early temperature rise of concrete, reducing the early deformation of concrete. During the construction of the site, the temperature rise and strain of concrete were monitored in real time. Monitoring results show that the basic mass concrete indicators meet the requirements of the corresponding norms.