象山水电站土石坝防渗墙塑性混凝土性能试验研究

结合象山水电站现场施工条件,采用5~31.5 mm连续级配天然砂石做塑性混凝土的粗骨料,且只掺用膨润土,进行了连续级配的槽板式和现浇式塑性混凝土新拌、硬化、变形、相对渗透系数及允许渗透比降等试验性能研究,推荐出合理混凝土配合比,获得了成功应用。

Experimental study on performance test for plastic concrete of cutoff wall of rock and earth-fill dam for Xiangshan Hydropower Station

During the construction of Xiangshan Hydropower Station,the natural sandy gravel with the continuous gradation of 5~31.5 mm is used as the aggregate for plastic concrete mixed only with bentonite in accordance with the construction condition in situ,.For the slot-plate and cast-in-situ plastic concretes with continuous gradation,the performance studies on the properties such as newly mixing,hardening,deformation,relative permeability coefficient,allowable seepage gradient etc.are studied,and then reasonable concrete mixing proportion is recommended,which has been successfully applied to the project concerned.