新疆某水库心墙碾压沥青混凝土配合比研究

Research on the Mix Ratio of Asphalt Concrete for Rolling Compaction of the Core Wall of a Reservoir in Xinjiang

BMD水库作为一座百米级的碾压混凝土心墙坝,其安全建设和运行对流域社会经济可持续发展具有举足轻重的作用。高沥青心墙坝对心墙沥青混凝土的性能要求较高,充分考虑不同高度沥青混凝土心墙的应力作用,通过室内试验优选出油石比:6.7%,级配指数:0.39,填料含量:12%和油石比:7.0%,级配指数:0.39,填料含量:13%的2组心墙沥青混凝土配合比。以适应坝体的应力和变形,从而优化坝体结构。合理的心墙沥青混凝土配合比参数不仅能够减少试验工作量,控制工程建设成本,而且能够保证工程的安全运行。

As a 100 meter level roller compacted concrete core wall dam,the safe construction and operation of BMD Reservoir play a crucial role in the sustainable development of the basin's social and economic development.High asphalt core wall dams require high performance of asphalt concrete for the core wall,and it is necessary to fully consider the stress effects of asphalt concrete core walls at different heights.Through indoor experiments,two sets of asphalt concrete mix proportions for core walls were selected,with an oil stone ratio of 6.7%,a gradation index of 0.39,a filler content of 12%,and an oil stone ratio of 7.0%,a gradation index of 0.39,and a filler content of 13%.These mix proportions are suitable for the stress and deformation of the dam body,thereby optimizing the dam structure.Reasonable asphalt concrete mix ratio parameters for core walls can not only reduce testing workload,control construction costs,but also ensure the safe operation of the project.