白鹤滩水电站复杂岩性骨料混凝土均一性研究

Study on the Uniformity of Heterogeneous Aggregate Concrete of Baihetan Hydropower Station

白鹤滩水电站混凝土量大,工程开挖料多,但玄武岩开挖料岩性较复杂,且各细分岩性原岩物理力学性能存在一定差异,能否用于混凝土骨料是工程建设中碰到的重大技术经济问题。为此,在试验成果基础上,采用统计和工程类比方法对不同岩性玄武岩骨料混凝土均一性进行了分析研究,结果表明,玄武岩开挖料岩性差异引起的混凝土性能波动较小,符合规范规定,且采用灰岩细骨料有助于改善混凝土性能的均一性。

The Baihetan Hydropower Station is large in concrete volume and excavated basalt. Its excavated basalt is complex in rock features and has different physical and mechanical properties. It is an important economic and technical issue whether the excavated basalt can be used as aggregate. For this reason, the uniformity of concrete made by heterogeneous excavated basalt aggregate of Baihetan Hydropower Station is investigated by statistical analysis and project comparison in this paper. The results showed that the excavated basalt can be used as aggregate and its difference in physical and mechanical properties can not lead to poor uniformity of concrete,and the uniformity of concrete can be increased by using limestone sand.