摘要
A novel crystal nucleus-based cement-hardening accelerator was evaluated using various mortar and segment concrete experiments.The mechanism of hardening acceleration was investigated via hydration temperature variation analysis,hydration degree analysis,X-ray diffraction(XRD)and scanning electron microscopy(SEM).In the presence of accelerator,the fluidity loss of mortar was increased after 30 minuites,and a coagulation was also observed.Moreover,based on the image of SEM,the formation of C-S-H gels was enhanced in the early hydration.As a result,the hardening accelerator could significantly boost the early strength of concrete,especially within one day of pouring,and shorten steam curing time to meet the demolding strength.
作者
邓最亮
WANG Weishan
路贵民
FU Lefeng
ZHENG Baicun
DENG Zuiliang;WANG Weishan;LU Guimin;FU Lefeng;ZHENG Baicun(School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China;Technical Center,Shang-hai Sunrise Polymer Material Co.,Ltd.,Shanghai 200231,China;Technical Center,Shanghai Sunrise Polymer Material Co.,Ltd.,Shanghai,200231,China)
基金
Funded by Star Program(No.1804QB1403200)from Science and Technology Commission of Shanghai Municipality。