Study of In-Service Asphalt Pavement High-Temperature Deformation Based on Accelerated Pavement Test
This paper explores high temperature deformation regularity of asphalt pavement/asphalt mixture test specimen under different conditions: in-service asphalt pavement, 10 cm milled and overlaid asphalt course with and without vibration rolling, normal over
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Abstract This paper explores high temperature deformation regularity of asphalt pavement/asphalt mixture test specimen under different conditions: in-service asphalt pavement, 10 cm milled and overlaid asphalt course with and without vibration rolling, normal overlaid asphalt pavement section, based on full-scale accelerated pavement testing equipment MLS66 and lab repeat wheel rolling test. The research findings reveal that asphalt pavements under different conditions show similar high temperature deformation regularity apparently in three-stage deformation. The degree of compaction and the age have significant impact on high temperature deformation performance of asphalt pavement. Based on the number of accumulation loading applied to the pavement and rutting depth, preliminary conversion relationship between accelerated loading actions and actual standard loading actions is drawn from the perspective of resistance to deformation. The concept of deformation stability is introduced to indicate the high-temperature deformation resistance of asphalt pavement and the high-temperature APT deformation stability results could be converted to the lab test deformation stability results with a conversion coefficient of 1.2–2.8.
Keywords Full-scale accelerated pavement testing In-service asphalt pavement High temperature deformation Degree of compaction
1 Introduction Accelerated pavement test (APT) refers to a test in which loadings by prototype wheel loads were repeated on a prototype or practical multi-layer pavement structure in a short duration and under controlled conditions to investigate the L. Liu Y. Yuan L. Sun (&) Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, 4800 Cao’an Road, Shanghai 201804, China e-mail: [email protected] L. Liu e-mail: [email protected] © Springer International Publishing Switzerland 2016 J.P. Aguiar-Moya et al. (eds.), The Roles of Accelerated Pavement Testing in Pavement Sustainability, DOI 10.1007/978-3-319-42797-3_30
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performance of the structure. This method has been widely applied for the performance evaluation of materials and the pavement structure for years (Galal and White 1999; Harvey and Bejarano 2000; Hugo and Martin 2004; Lee et al. 2006). Nevertheless, it was not given much attention in the early days. It was until the end of the Strategic Highway Research Program (SHRP) when pavement damages could not be explained by traditional theories for the drastically increasing traffic, and also in order to verify the research achievements of SUPERPAVE that APT attracted significant attentions. Current applications of APT focus on comparisons of different structures, materials and loading patterns, modelling and material performance analysis, and were generally indoor or specific field tests (Cho et al. 2010; NCAT 2011; Ullidtz et al. 2006, 2010a, b). Few studies of in-service asphalt pavement by APT have been reported. Currently, studies related to APT are focusing on loading acceleration, environment
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