大古水电站碾压混凝土试验研究

Experimental Research on RCC in Dagu Hydropower Station

为验证高海拔、太阳辐射强、干燥、风大等特殊气候条件下大坝碾压混凝土配合比的各项性能,确定合理的碾压工艺参数,对碾压混凝土的配合比、硬化混凝土的各种性能进行了试验和原位检测。试验结果表明,该特殊气候条件对混凝土VC值和初凝时间影响较大,需要在施工过程中做好喷雾、覆盖、表面保温等措施,才能使混凝土满足施工质量要求。

In order to verify the various performances of the RCC mix ratio of the dam under special climate conditions such as high altitude,strong solar radiation,dryness and wind,etc.,and determine reasonable rolling process parameters,experiments and in-situ tests were performed on the mix ratio of RCC and various properties of hardened concrete.The test results show that this special climatic condition has a large impact on the VC value and initial setting time of concrete.During the construction process,measures such as spraying,covering,and surface insulation should be done,so that the concrete can meet the requirements of construction quality.