摘要
与普通城市路面不同,海绵城市路面对透水沥青混合料的渗透性能要求较高。为提高透水沥青混合料的路用性能,提出了计及渗透系数的海绵城市路面透水沥青混合料配比设计优化。以改性沥青、石灰石碎石、机制砂、矿粉填料、聚酯纤维和玄武岩纤维为原材料,在沥青混合料的3种设计级配下,根据海绵城市路面承载能力与渗水系数之间的主次关系确定目标孔隙率,实测发现设计级配3与目标孔隙率相符,并通过Schellenberg沥青渗流试验和Cantabro飞散试验确定了最佳沥青用量。结果表明,在设计级配3下,当孔隙率为18.058%、最佳沥青用量为4.95%时,沥青混合料的渗透系数在800 mL/15 s以上,可以满足海绵城市路面规范的要求。
Different from ordinary urban pavements,sponge urban pavements have higher requirements on the permeability of permeable asphalt mixture.In order to improve the pavement performance of permeable asphalt mixture,the optimization research on the proportion design of permeable asphalt mixture of sponge urban pavements considering the permeability coefficient is put forward.With modified asphalt,limestone macadam,machine-made sand,mineral powder filler,polyester fiber and basalt fiber as raw materials,the target porosity is determined according to the primary and secondary relationship between the bearing capacity of sponge urban pavement and water permeability coefficient under three design gradations of asphalt mixture,and it is found that the design gradation 3 is consistent with the target porosity through actual measurement.Through Schellenberg asphalt seepage experiment and Cantabro scattering experiment,the optimum asphalt content is determined.The test results show that under the design gradation 3,when the porosity is 18.058%and the optimum asphalt content is 4.95%,the permeability coefficient of asphalt mixture is above 800 mL/15 s,which meets the specification requirements of sponge city pavement.
作者
郭烽仁
郭溦
GUO Fengren;GUO Wei(College of Architecture and Engineering,Fujian Information Vocational and Technical College,Fuzhou 350003,China;Fuzhou Water Supply Co.,Ltd.,Fuzhou 350007,China)
出处
《河南工程学院学报（自然科学版）》
2024年第1期25-30,共6页
Journal of Henan University of Engineering：Natural Science Edition
基金
福建省中青年教师教育科研项目(JAT201085)。
关键词
渗透系数
配比设计
混合料
透水沥青
海绵城市
路用性能
permeability coefficient
proportion design
mixture
permeable asphalt
sponge city
road performance
