基于改进粗集料针片状含量的高速公路沥青混合料配合比设计研究  

Research on the Mix Design of Expressway Asphalt Mixture Based on Improving the Needle-like Content of Coarse Aggregate

作　　者：张治强 高源 谢春磊 靳陆东 王东升 ZHANG Zhi-qiang;GAO Yuan;XIE Chun-lei;JIN Lu-dong;WANG Dong-sheng

机构地区：[1]内蒙古自治区交通运输科学发展研究院,内蒙古呼和浩特010051 [2]内蒙古自治区道路结构与材料重点实验室

出　　处：《内蒙古公路与运输》2024年第3期1-5,共5页Highways & Transportation in Inner Mongolia

摘　　要：为提高高速公路下面层沥青混合料的路用性能,设计出较优的沥青混合料,以某高速公路下面层试验段为依托,从下面层应具有较好的抗车辙和抗裂性功能出发,针对沥青混合料配合比设计中的技术要点,通过室内试验和现场试验段铺筑情况,对原材料、沥青混合料目标配合比和生产配合比进行研究。提出了减少粗集料针片状含量的改进措施,得出沥青混合料的最佳油石比及矿料掺配比例,为高速公路沥青混合料配合比设计提供参考。In order to improve the road performance of the asphalt mixture of the lower layer of the expressway and design a better asphalt mixture,a test section of the lower layer of a expressway was taken as the research object.Starting from the fact that the lower layer should have good anti-rutting and anti-cracking functions,the raw materials,target mix ratio and production mix ratio of asphalt mixture were studied through indoor tests and on-site test section paving conditions,based on the technical points in the design of asphalt mixture ratio.Through the study,improvement measures to reduce the needle-like content of coarse aggregate were proposed,and the optimal oil-stone ratio and mineral blending ratio of asphalt mixture were obtained,which provided a reference for the subsequent design of asphalt mixture ratio of expressway.

关 键 词：高速公路 下面层 沥青混合料 配合比设计 

分 类 号：U445[建筑科学—桥梁与隧道工程]