AC-20沥青混合料路用性能优化  

Optimization of Road Performance for AC-20 Asphalt Mixture

作　　者：陆学元[1] 

机构地区：[1]安徽省高速公路控股集团有限公司,安徽合肥230051

出　　处：《华中科技大学学报（城市科学版）》2010年第2期15-20,共6页Journal of Huazhong University of Science and Technology

基　　金：安徽省2005年交通科技进步计划项目(发改交运[2005]1247号)

摘　　要：综合考虑级配、油石比、砂当量、空隙率和外部荷载等因素,应用正交试验设计和方差理论研究了常用于沥青中面层的AC-20改性沥青混合料组成与路用性能优化问题,优化提出了沥青混合料的组成设计范围。结果表明,空隙率和砂当量是影响路面水稳定性的关键因素,空隙率和粉胶比是影响路面抗车辙性能的又一关键因素,并给出了施工质量控制措施的建议;虽然4.75 mm通过率对马歇尔性能指标的影响不显著,但对70℃高温动稳定度影响很大,优化4.75 mm筛孔通过率可显著提高路面高温稳定性能。In consideration of factors including gradation,OAC,sand equivalent value,void content and external load and other factors,the article applied orthogonal experiment design and variance theory to study composition optimization design and road performance of AC-20 modified asphalt mixture,and optimization composition of asphalt mixture design range is proposed.the results show that void content and sand equivalent value are key influencing factors about water damage,and void content and DP are another key factor about pavement the antirutting performance.The article gives the construction quality control measures.The 4.75mm passing rate is not significant on the impact of Marshall＇s performance,but it greatly influences the tem-perature 70℃ dynamic stability.Optimization of the 4.75mm passing rate can significantly increase the pave-ment high temperature performance.

关 键 词：AC-20沥青混合料 试验设计与方差分析 沥青混合料性能优化 

分 类 号：U414.75[交通运输工程—道路与铁道工程]