【摘要】 为了分析集料级配对开级配大粒径沥青碎石路用性能的影响,采用变i法设计开级配大粒径沥青碎石(OLSM)的集料级配,通过浸水大马歇尔试验、冻融劈裂试验、车辙试验和低温弯曲试验等性能试验,研究OLSM集料级配与其空隙率、强度、水稳定性、高温稳定性和低温抗裂性等路用性能的关系.结果表明:随着i值的减小、粗集料含量的增加,OLSM的空隙率增大,强度、水稳定性和高温稳定性降低,低温抗裂性先提高后降低;并基于路用性能的技术要求,推荐了满足各项性能的OLSM集料级配.更多还原

【Abstract】 In order to analyze the influence of aggregate gradation on pavement performance of open-graded large stone asphalt mixes(OLSM),the numerical calculation method of varying I is used to design aggregate gradation of OLSM,and based on the results of immersion large-scale Marshall test,freeze-thaw split test,rutting test and bending test at low temperature,the relationships between the porosity,strength,water stability,high temperature stability,and low-temperature crack resistance of OLSM and aggregate gradation are analyzed in this paper.Research shows that with the value of I decreasing and content of coarse aggregate increasing,the porosity of OLSM increases,the strength,water stability and high temperature stability of OLSM decrease,and low-temperature crack resistance of it increases first and then decreases.Based on the technical requirements,the reasonable aggregate gradation of OLSM is recommended.更多还原