摘要
通过2种细集料(天然砂、机制砂)、2种级配(AC-13、Sup-12.5)沥青混合料的试验研究,分析了细集料类型和禁区对混合料体积指标和高温动稳定度的影响,结果表明机制砂更能有效提高混合料的高温性能,禁区的存在可有效限制细集料特别是天然砂的用量,以明显提高沥青混合料重载作用下混合料的动稳定度。而体积参数结果表明,Superpave设计方法中用固定空隙率4%标准来确定最佳沥青用量的方法是否合理有待进一步验证。
Based on the test results of asphalt mixtures composed of two types of fine aggregate（natural sand and manufactured sand） and two types of gradation （AC-13 and Sup-12.5）,the effects of fine aggregate type and restricted zone on the volume characteristics and high temperature dynamic stability of asphalt mixture are discussed.The results show that manufactured sand can improve the high-temperature properties of asphalt mixture and restricted zone can limit quantify of fine aggregate,especially of nature sand to increase the dynamic stability of heavy-duty asphalt mixture.The Volume characteristics show that it must be validated the rationality of Superpave Design Method to determine the optimal asphalt dosage with the criterion of fixed void ratio 4%.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第1期25-28,共4页
Journal of Wuhan University of Technology
基金
交通部联合攻关项目(2003-353-313-020)
