摘要
为克服目前沥青路面空隙率检测代表性及准确性差的缺点,研究开发直接实测沥青路面芯样最大理论相对密度及计算空隙率的沥青介质法,并应用于实际工程的质量检测与评定。研究结果表明,与传统方法相比,沥青介质法克服了溶剂法与真空法的缺点,以热沥青为介质,更准确地测定了沥青芯样的最大理论相对密度,因此准确性更高;沥青介质法直接利用芯样本身的毛体积密度及最大理论相对密度计算芯样空隙率,因此代表性更强;工程中只要有沥青路面芯样,便可应用沥青介质法实测其空隙率,而不需查阅施工时的混合料最大理论密度,因此应用更方便。利用沥青介质法实测的芯样最大理论相对密度的变异性可准确评价沥青路面的变异性;沥青介质法实测的路面空隙率与渗水系数有很好的相关关系。实际工程中,可方便地利用沥青介质法实测芯样空隙率,其结果可作为路面质量评价及质量监控的有效手段。
In order to overcome the disadvantages of poor representation and the accuracy in current air voids of asphalt pavement testing,we researched and developed the asphalt medium method for direct measuring asphalt pavement core samples＇ largest theory relative density and calculating air voids,and applied it for quality inspection and evaluation of practical projects. The research result shows that（ 1） Compared with traditional method,the asphalt medium method overcame the drawbacks of solvent method and vacuum method,using heat asphalt as medium,it can more accurately measure the largest theory relative density of asphalt core samples,so the accuracy is higher.（ 2） The asphalt medium method directly uses the core samples＇ bulk density and largest theory relative density for core samples＇ air voids calculation,it has stronger representation.（ 3） As long as there is core samples from asphalt pavement,the asphalt medium method can be used for measuring its air voids,and it does not need to consult the maximum theoretical density of mixture for construction,so the application is more convenient. The variability of the measured largest theory relative density of core samples using the asphalt medium method can accurately evaluate the variability of the asphalt pavement.（ 4） There is a good relationship between the measured pavement air voids and the water seepage coefficient measured by the asphalt medium method. In practical projects,the method can be easily used for measuring the air voids of asphalt core samples,the result can be used for pavement quality evaluation and quality control.
出处
《公路交通科技》
CAS
CSCD
北大核心
2016年第4期7-11,38,共6页
Journal of Highway and Transportation Research and Development
基金
教育部新世纪优秀人才支持计划项目(NCET-10-0277)
关键词
道路工程
沥青路面芯样
沥青介质法
空隙率
理论最大相对密度
road engineering
asphalt pavement core sample
asphalt medium method
air voids
maximum theoretical relative density
