硅酸盐通报2017，Vol.36Issue(4)：1345-1350,1370,7.
不同温湿度环境下混凝土温度响应研究
Temperature Response of Concrete Influenced by Different Environment
摘要
Abstract
Temperature responses of concrete in service environment affect the hydration process, water/ions transportation and rebar corrosion in concrete.The temperature and RH (relative humidity) evolution of saturated concrete and Non-saturated concrete with RH=45%, 65% and 80% rising and cooling process at 5 ℃, 45 ℃, 65 ℃ and 85 ℃ temperature were studied.And the thermal conductive coefficient of non-saturated concrete was also tested.The results of the experiment prove that temperature response time of concrete was increased with decreasing RH.Compared with response time of saturated concrete in rising and cooling process, the time of concrete with RH=45% prolonged 6-7 and 7-8 times, respectively.And the time of thermal flow to 10 mm depth of concrete with RH=45%-65% would be 30-50 min.The temperature response time of concrete would be shortened with decreasing distance to thermal source when concrete subjected to rinsing and cooling process.The inner RH of concrete increased firstly, and then trended toward steady in the temperature rising and cooling process.The interaction effects between thermal conduction and RH transportation was observed in this experiment.Additionally, the thermal conductive coefficient of concrete increased with increasing RH in concrete, and extending curing age.关键词
非饱和混凝土/温度/湿度/热传导Key words
non-saturated concrete/temperature/RH/thermal conduction分类
建筑与水利引用本文复制引用
陈永丰,金祖权..不同温湿度环境下混凝土温度响应研究[J].硅酸盐通报,2017,36(4):1345-1350,1370,7.基金项目
国家自然科学基金项目(51378269,5142010501) （51378269,5142010501）
铁道部科研计划项目(2014G004-F) （2014G004-F）
