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Copyright of Journal of Jiangsu University (Natural Science Edition) / Jiangsu Daxue Xuebao (Ziran Kexue Ban) is the property of Editorial Department of Journal of Jiangsu University (Natural Science Edition) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

To scientifically select and evaluate ultra-thin wearing course asphalt mixture, three types of asphalt mixture, SMA-10, UTAC-10 and NovaChip Type-C were selected to study the performance evaluation indicator. The low temperature performance of mixture was evaluated by use of thermal stress rest rained specimen test, and the surface performance was evaluated by permeable coefficient test and anti-slide performance test. A kind of indoor abrasion test was designed to evaluate the skid resistance attenuation property of asphalt mixture, and a set of dispersion tests under three conditions was designed combining with freeze-thaw splitting test to evaluate water damage resistance performance of asphalt mixture. The results show that the frozen broken temperature and frozen broken strength can effectively evaluate the low temperature performance of ultra-thin wearing course asphalt mixture. It is scientific to use initial value of BPN and sliding attenuation degree to evaluate skid resistance performance of ultra-thin wearing course. Freeze-thaw splitting strength ratio and freeze-thaw splitting strength should be combined to evaluate resistance water damage performance. [ABSTRACT FROM AUTHOR]

By adopting the digital speckle correlation method (DICM), the tensile strain researches in the indirect tension test of asphalt mixture sample are preceded in this paper. Simulation on the tension of speckle diagram shows that the DICM is available, and its accuracy is high. Furthermore, the efficiency of DICM is proved by the comparison and analysis with the gauge measuring and calculating method. It is concluded that DICM is feasible in measuring the indirect tensile strain. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Beijing University of Technology is the property of Journal of Beijing University of Technology, Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Using AC-13 modified asphalt mixture as the research object, the whole weathering accelerator was used for 0~3000 hrs aging test at different UV intensities. The aging asphalt mixtures were subjected to high-temperature rutting, low-temperature trabecular bending, freeze-thaw splitting and fatigue tests, respectively, comparing and analyzing the changes of pavement performance for asphalt mixtures. The results showed that when the conditions of thermal oxygen aging and humidity were same, the high-temperature stability of asphalt mixture increased first and then decreased after increasing the intensity of UV. With the increase of the stiffness modulus of the asphalt mixture, the crack resistance at low temperature decreased slightly. On the contrary, the water stability and fatigue performance of the asphalt mixture decreased greatly. [ABSTRACT FROM AUTHOR]