%0 Journal Article
%A FAN Qi-xiang
%A YANG Hua-quan
%A LI Wen-wei
%A WANG Zhi-lin
%A CHEN Xia
%T Comparison of Thermal and Mechanical Properties Between Low-heat and Medium-heat Portland Cement Concrete
%D 2018
%R 10.11988/ckyyb.20180044
%J Journal of Changjiang River Scientific Research Institute
%P 133-137
%V 35
%N 12
%X The thermal and mechanical properties of low-heat cement and medium-heat cement are compared with the concrete of Baihetan dam as a research object. The compared thermal and mechanical properties include compressive strength, drying shrinkage, autogenous volumetric deformation, and adiabatic thermal rise. Results indicate that given the same water-binder ratio and fly ash content, low-heat cement concrete possesses lower strength, ultimate tension and Young’s elastic modulus at 7 d and 28 d than medium-heat cement concrete does; with the extension of testing age, strength of low-heat cement concrete grows, approaching the strength of medium-heat cement concrete; while at the 180 d age, the strength and ultimate tension of low-heat cement concrete are larger than those of medium-heat cement concrete. No big difference was observed in terms of drying shrinkage, and both concretes exhibited micro-expansion in autogenous volume deformation. The insulated thermal rise of low-heated cement concrete at 28 d age is lower than that of medium-heat cement concrete by 2.0℃-3.5℃. Overall, low-heated cement concrete was rated better than medium-heated cement concrete in terms of crack resistance.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20180044