【摘要】 采用沥青路面分析仪(APA)研究水作用下混合料试件永久变形的表现形式。试件分别经浸泡、饱水、冻融三种方式预处理;APA测试采用干车辙和浸水车辙两种形式。试验结果表明:水的存在对沥青混合料永久变形有影响;浸水车辙深度普遍大于干车辙深度;严酷的预处理过程没有导致较大的永久变形;在相同的冻融次数下,随着饱和度增大,浸水车辙深度减小;在相同的饱和度下,未经冻融处理的试件其浸水车辙深度普遍大于经过冻融处理试件的车辙深度。分析结果表明:APA测试形式、APA测试形式与试件预处理方式的交互作用、冻融循环次数分别是产生上述试验结果的主要原因。更多还原

【Abstract】 The objective of this study was to investigate the effects of water on permanent deformation potential using asphalt pavement analyzer(APA). The samples were preconditioned with three different procedures: soak, saturation, and saturation with freezing and thawing cycle.The experimental results indicated that water influenced the rut depth in some degree. The depth of wet rut were greater than those of dry rut universally.The harsher preconditioning did not result in the larger wet rut depths. As same freezing and thawing cycle time, the wet rut depth decreased with increase of the saturation. As same saturation, the wet rut depth of samples saturated only were usually greater than those saturated with freezing and thawing cycle. The results of statistical analysis indicate that APA testing form, the interaction of APA testing form and preconditioning way, and the time of freezing and thawing cycle are the main reasons of the test results mentioned above.更多还原