室内成型试件与路面芯样的抗车辙差异性评价
发布时间：2019-03-09 14:37
【摘要】：为了评价室内成型试件与路面芯样抗车辙能力的差异,利用多轮车辙仪(RLWT)获取车辙变形量,从宏观角度研究室内成型试件与路面芯样的抗车辙能力;采用工业CT获取沥青混合料断面扫描图像,从细观角度探讨室内成型试件与路面芯样的粗集料颗粒与面空隙率沿深度方向的分布状况.结果表明:由于压实方式不同,两种试件的空隙率相差甚大,从而导致其抗车辙能力也有明显差异;路面芯样的粗集料颗粒与面空隙率在深度方向分布的均匀性较差;路面芯样的平均面空隙率及上端的面空隙率明显大于室内成型试件,从细观角度证明了宏观研究成果的准确性.
[Abstract]:In order to evaluate the difference of anti-rut ability between indoor molded specimen and pavement core sample, the rut deformation of indoor molded specimen and pavement core sample was studied by using multi-wheel switch instrument (RLWT), and the anti-rut ability of indoor molded specimen and pavement core sample was studied from macroscopic angle. The cross-section scanning images of asphalt mixture were obtained by industrial CT, and the distribution of coarse aggregate particles and surface voids along the depth direction was discussed from the view of meso-view. The results show that due to the different compaction methods, the voids of the two specimens differ greatly, which leads to the obvious difference in rut resistance, the distribution uniformity of coarse aggregate particles and surface voids in the pavement core is poor in the depth direction, and the results show that there is a significant difference in the rut resistance between the two specimens. The average surface void rate of pavement core sample and the surface voidage rate of upper end are obviously higher than those of indoor molding specimen. The veracity of macro-research results is proved from the view of meso-view.
【作者单位】： 华南理工大学土木与交通学院;
【基金】：国家重大科技支撑计划项目(2011BAG07B03)
【分类号】：U418.68
本文编号：2437556
[Abstract]:In order to evaluate the difference of anti-rut ability between indoor molded specimen and pavement core sample, the rut deformation of indoor molded specimen and pavement core sample was studied by using multi-wheel switch instrument (RLWT), and the anti-rut ability of indoor molded specimen and pavement core sample was studied from macroscopic angle. The cross-section scanning images of asphalt mixture were obtained by industrial CT, and the distribution of coarse aggregate particles and surface voids along the depth direction was discussed from the view of meso-view. The results show that due to the different compaction methods, the voids of the two specimens differ greatly, which leads to the obvious difference in rut resistance, the distribution uniformity of coarse aggregate particles and surface voids in the pavement core is poor in the depth direction, and the results show that there is a significant difference in the rut resistance between the two specimens. The average surface void rate of pavement core sample and the surface voidage rate of upper end are obviously higher than those of indoor molding specimen. The veracity of macro-research results is proved from the view of meso-view.
【作者单位】： 华南理工大学土木与交通学院;
【基金】：国家重大科技支撑计划项目(2011BAG07B03)
【分类号】：U418.68
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