大体积混凝土温差效应控制理论与施工  

Theory About Temperature Difference Effect Control and Construction of Large Volume Concrete

作　　者：邓龙龙 邓燕华[1,2] 涂群岚[2] 刘明亮[2] 

机构地区：[1]中恒建设集团有限公司,江西南昌330038 [2]江西建设职业技术学院土木工程系,江西南昌330200

出　　处：《筑路机械与施工机械化》2014年第3期51-53,共3页Road Machinery & Construction Mechanization

摘　　要：为解决大体积混凝土构件在受荷前就开裂的工程技术问题,通过对其开裂机理分析,发现产生裂缝的主因是混凝土凝固时产生的内外温差所形成的温差应力。为有效控制温差应力,重点论述了配合比设计与优化及施工过程监控技术要点。实践证明,该理论计算结果与实践较吻合,是既简便又实用的控制温差效应的方法。In order to solve the technical problems of large volume concrete components cracked before loading, by the analysis of cracking mechanism, it was found out that the main reason was the temperature stress caused by the internal and external temperature difference when the concrete was solidificated. Aimed to control the temperature stress effectively, the technical points wene expounded as an emphasis on the mixture ratio design and optimization and monitoring of the construction process. It is proved that the theoretical calculation results accord with practice, and it is a simple and practical method to control the effect of temperature difference.

关 键 词：大体积混凝土 温度差 配合比优化 混凝土养护 

分 类 号：U414.1[交通运输工程—道路与铁道工程]