严寒地区抽水蓄能电站面板混凝土性能试验研究

Experimental study on panel concrete performance of pumped storage power station in severe cold region

抽水蓄能作为一种优质的可再生能源,近年来国家大力发展抽水蓄能电站。在严寒地区修建抽水蓄能电站也日益增多,其大坝多为面板堆石坝,严寒地区冬季负温时间较长,年冻融周期次数较多,对面板混凝土抗冻抗裂要求高。从混凝土原材料性能、极限水灰比选择、混凝土抗冻及不同外加掺和料对混凝土抗裂性能比对,开展严寒地区抽水蓄能电站大坝面板混凝土性能试验及成果分析。通过该工程面板混凝土的抗冻抗裂成果及实体裂缝普查,探讨高抗冻混凝土水灰比及材料方面的选择,为后续严寒地区混凝土性能研究提供参考。

Pumped storage as a high-quality renewable energy,the country has vigorously developed pumped-storage power stations in recent years.The construction of pumped storage power stations is also increasing in severe cold areas,and most of their dams are face rockfill dams.In severe cold areas,the negative temperature time in winter is longer,and the annual freeze-thaw cycle times are more,so the requirements for frost resistance and crack resistance of panel concrete are high.In this paper,from the properties of concrete raw materials,the selection of ultimate water cement ratio,frost resistance of concrete and comparison of anti cracking properties of different admixtures on concrete,carry out performance test and result analysis of dam face slab concrete of pumped storage power station in severe cold areas.Based on the anti-freezing and anti-cracking results of the panel concrete and the solid crack general survey,this paper discusses selection of water cement ratio and materials of high frost resistant concrete,so as to provide reference for the subsequent study of concrete performance in severe cold areas.