Effect of Curing Conditions on Properties of Refractory Precast Bonded with Calcium Aluminate Cement (CAC)
The effect of curing temperature (5℃-70℃) and humidity (in open and closed environments) on the properties of precast bonded with CAC was investigated It is found that the strength after curing and drying increases with rising curing temperature.The reason is that high temperature promotes hydration of cement and formation of hydrates.However, high curing temperature tends to lower permeability and thus may results in higher risk of explosion/cracking during drying.Strength after firing increases first with rising curing temperature and reaches a maximum at 45℃ then falls down slightly.At same curing temperature, the strength of sample cured in closed environment is lower than the one of samples cured in open environment, after either curing, drying or firing.This can be attributed to the free water in the samples, which is difficult to evaporate in closed environment and thus forms microstructural voids.Curing in closed environment has little effect on improvement of permeability.
precast curing temperature open/closed environment strength permeability
GAO Jianying ZHANG Ziyi SHEN Mingke XU Bin Bruno TOUZO
Kerneos Research Center Asia (KRCA),Tianjin 300457 Zhejiang Zili Corporation Limited (Zili Limited),Shangyu 312300
国际会议
西安
英文
1-5
2016-09-20（万方平台首次上网日期，不代表论文的发表时间）