摘要
【目的】研究再生沥青调和理论的适用性,为再生沥青路用性能的研究提供理论基础,促进再生沥青在道路工程实践中的应用和发展。【方法】采用添加相同等级基质沥青的方式,对不同掺量下的新-旧沥青进行再生试验,并利用沥青的三大指标、布氏黏度及美国公路战略研究计划(strategic highway research program,SHRP)指标进行研究。【结果】不同基质沥青掺量的再生70^(#)基质沥青和再生SBS改性沥青的针入度对数、高温车辙因子对数及黏度对数与新沥青掺量间的线性精度都在0.99以上。【结论】不同基质沥青掺量的再生沥青的针入度、高温车辙因子、黏度、延度都满足调和理论的方程;再生沥青各温度下的低温蠕变速率、劲度模量与新沥青掺量之间的线性精度较差。
[Purposes]The paper aims to study the practicability of the blending theory of recycled asphalt,provide a theoretical basis for the road performance of recycled asphalt,and promote the application and development of recycled asphalt in road engineering practice.[Methods]By adding the same grade of matrix asphalt,the recycling experiments were carried out on new and old asphalt with different contents,at the same time,the three indexes of asphalt,Brookfield viscosity and American strategic highway research program(SHRP)indexes were used for research.[Findings]For recycled 70^(#)matrix asphalt and recycled SBS modified asphalt with different matrix asphalt contents,the linear accuracy between penetration logarithm,high-temperature rutting factor logarithm,viscosity logarithm and new asphalt content is more than 0.99.[Conclusions]The logarithm of penetration,high-temperature rutting factor,viscosity and ducitility of recycled asphalt with d ifferent matrix asphalt contents all meet the equation of the blending theory;but the linear accuracy between low-temperature creep rate,stiffness modulus and new asphalt content of recycled asphalt at each temperature is poor.
作者
田小革
卢雪蓉
窦文利
昶慧芹
李慧珍
TIAN Xiao-ge;LU Xue-rong;DOU Wen-li;CHANG Hui-qin;LI Hui-zhen(School of Traffic and Transportation Engineering,Changsha University of Science&Technology,Changsha 410114,China;Hebei Provincial Expressway Jingxiong Temporary Preparation Office,Baoding 071700,China;Transportation Planning and Design Institute of Chengde Transportation Bureau,Chengde 067000,China;Hebei Expressway Group Co.,Ltd.,Shijiazhuang 050031,China)
出处
《长沙理工大学学报（自然科学版）》
CAS
2022年第1期20-26,共7页
Journal of Changsha University of Science and Technology:Natural Science
基金
国家自然科学基金资助项目(51978086)
湖南省交通运输厅科技项目(201905)。
关键词
再生沥青
再生试验
SHRP指标
线性精度
适用性
recycled asphalt
recycling experiment
SHRP index
linear accuracy
practicability
作者简介
通信作者:田小革(1970-),男,教授,主要从事路面设计理论与方法、路面新材料等方面的研究。E-mail:tianxiaoge@126.com。
