凝灰岩制备碾压混凝土人工砂石骨料的难点与措施

摘要

凝灰岩岩性具有强度高、韧性大的特点，利用凝灰岩轧制碾压混凝土人工砂石料存在人工砂石料质量难以控制和生产效率低的难题。西溪水库工程碾压混凝土施工过程中采用掺入一定比例人工砂和改造砂石系统等措施，有效地解决了难题。工程质量检测数据表明，工程质量符合设计要求。西溪水库工程为类似工程的建设提供有益借鉴。%The rock of tuff has characteristics of high strength and toughness.Thus, problems occur in the production of artificial aggregate with tuff for roller compacted concrete, such as the difficulty of quality control and the low production efficiency.In the roller compacted concrete construction in Xixi Reservoir Project, these problems are solved by adopting certain measures, which include the ratio control of artificial tuff aggregate added in the concrete, and renovation of the aggregate processing system.Field practice shows that the construction quality is satisfying.