Shrinkage crack inhibiting of cast in situ tunnel concrete by double regulation on temperature and deformation of concrete at early age
作者: Ming LiWen XuYujiang WangQian TianJiaping Liu
作者单位: 1State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Research Institute of Building Science Co., Ltd., Nanjing 210008, China
2Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
3School of Materials Science and Engineering, Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
刊名: Construction and Building Materials, 2020, Vol.240
来源数据库: Elsevier Journal
DOI: 10.1016/j.conbuildmat.2019.117834
关键词: Crack controlCast in situ tunnelTemperature rise inhibitionShrinkage reduction
原始语种摘要: Abstract(#br)The temperature difference between peak temperature due to the hydration of concrete and its surrounding is the key factor that leads to early age cracking in main structure of tunnel concrete, and autogenous shrinkage will increase the crack risk. Given this, a temperature rise inhibited and slight expansion mixture (HME) was adopted in a large scale cast in situ tunnel under water. Results indicate that HME decreased the hydration rate of cement in the acceleration period and prolonged the main heat release peak. The early age rate of adiabatic temperature rise was decreased with a negligible level effect on the final value after using HME. In this case, the peak temperature could be decreased under a certain heat dissipation condition. Meanwhile, HME could reduce shrinkage...
全文获取路径: Elsevier  (合作)
影响因子:2.293 (2012)

  • cast 铸型
  • reduction 减少
  • tunnel 坑道
  • concrete 具体
  • double 双重的
  • inhibiting 抑制
  • temperature 温度
  • control 控制
  • regulation 
  • Temperature 温度