大体积混凝土温度控制关键技术  

KEY TECHNOLOGY OF MASS CONCRETE TEMPERATURE CONTROL

作　　者：段先军 贾福杰[2] 李长成[2] 雷素素 刘云飞[1] DUAN Xian-jun;JIA Fu-jie;LI Chang-cheng;LEI Su-Su;LIU Yun-Fei(Beijing Urban Construction Group Co.,Ltd.,100088,Beijing,China;China Building Materials Academy,100024,Beijing,China)

机构地区：[1]北京城建集团有限责任公司,北京100088 [2]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024

出　　处：《建筑技术》2018年第9期932-934,共3页Architecture Technology

基　　金：北京市科技计划课题(Z161100005116009)

摘　　要：在大体积基础底板混凝土施工中,水化热温升控制是质量控制的重要环节,而其关键是采取有效的试验手段对混凝土温升进行准确评价。北京新机场航站楼基础底板厚3 m,施工前从配合比设计、半绝热及绝热温升等方面研究混凝土温度控制技术,结合实际应用的原材料设计了较低水化温升的配合比,通过足尺模型验证了这一选择的合理性,从而确保了重大工程大体积混凝土体积稳定性及其施工质量。The control of temperature rise by hydration heat is the most important step for the quality control of 3m-thick large-size foundation, and the key is to use an effective test method to accurately evaluate the concrete temperature rise. In this paper, concrete temperature control technology are discussed including the aspects of mix design, semi-adiabatic and adiabatic temperature rise and full-scale model, combined with the practical application of raw materials, a lower hydration temperature rise was designed, the final full-scale model also validated the rationality of this choice, thus ensuring the volume stability of large-volume concrete in major projects and its construction quality.

关 键 词：大体积 温度应力 足尺模型 温度梯度 

分 类 号：TU755[建筑科学—建筑技术科学]