关键词: 碱骨料加工系统; 沥青混凝土拌和系统; 工艺流程; 质量控制; 旁多水利枢纽;

Abstract: In order to solve the problem of lack of concrete system design and operation experience in the construction of roller compacted asphalt concrete core wall in high altitude area of Tibet,combined with the climate and geological characteristics of Tibet,taking the asphalt concrete system of Pangduo Hydropower Project dam as an example,we introduce the process design,main equipment selection and system operation of the system in detail from two aspects of alkali aggregate processing and asphalt concrete mixing.In the alkali aggregate processing system,aiming at a large amount of dust,poor effect of the air separation system,and large moisture content of the aggregate,we put forward solutions and measures accordingly.Aiming at the problems of low weighing accuracy,carbonization blockage in pipeline and mismatch of aggregate gradation in asphalt concrete mixing system,relevant solutions and control measures were also given.A viewpoint was put forward that the results of secondary screening should be used as the basis for the quality control of asphalt concrete aggregate and the control index of aggregate super diameter should be appropriately relaxed.The research results can provide reference for the application of roller compacted asphalt concrete core wall in high altitude areas of Tibet.

Key words: alkali aggregate processing system; asphalt concrete mixing system; process flow; quality control; Pangduo Hydropower Project;