Accelerated weathering simulation on rheological properties and chemical structure of high viscosity modified asphalt: A temperature acceleration effect analysis - 文章详情页

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High　viscosity　modified　asphalt　(HVMA)　is　widely　used　as　the　binder　for　permeable　asphalt　pavement.　The　service　life　of　permeable　asphalt　pavement　strongly　depends　on　the　weathering　aging　resistance　of　HVMA　due　to　the　large　porosity　of　permeable　asphalt　pavement.　In　order　to　investigate　the　accelerated　deterioration　effect　of　temperature　on　the　weathering　aging　process,　a　laboratory　accelerated　weathering　aging　tester　was　used　to　simulate　the　long-term　weathering　aging　of　HVMA　at　different　aging　temperatures　(30　°C,　50　°C,　and　70　°C)　and　different　weathering　aging　days　(0　~　12d).　A　series　of　rheological　tests　were　conducted　to　study　the　influence　of　weathering　aging　temperature　on　the　rheological　properties　of　HVMA.　Then,　FTIR　test　was　applied　to　characterize　the　changes　in　chemical　composition　of　HVMA　at　different　weathering　aging　temperatures.　Furthermore,　an　aging　kinetics　model　was　put　forward　to　further　understand　the　effect　of　aging　temperature　on　the　weathering　aging　rate　of　HVMA.　The　results　indicate　that　the　weathering　aging　rate　of　HVMA　is　fast　in　the　early　aging　stage　(0　~　2d)　and　slows　down　in　the　later　aging　stage　(2　~　12d).　The　increase　of　aging　temperature　has　a　significant　accelerated　deterioration　effect　on　the　chemo-rheological　properties　of　HVMA　during　weathering　aging　process.　At　30　°C　aging　temperature,　the　deteriorated　rheological　properties　of　HVMA　are　mainly　due　to　the　aging　of　solar　radiation.　As　the　aging　temperature　increases　to　50　°C,　the　thermal　aging　effect　of　HVMA　begins　to　appear　under　the　stimulation　of　solar　radiation.　When　the　aging　temperature　rises　to　70　°C,　HVMA　has　suffered　from　a　severe　coupled　aging　of　high　temperature,　solar　radiation　and　humidity.　This　coupled　aging　effect　leads　to　a　significant　asphalt　oxidation　and　polymer　degradation,　which　is　the　main　reason　for　the　severely　deteriorated　rheological　properties　of　HVMA.　The　proposed　aging　kinetics　model　results　also　confirm　the　accelerated　deterioration　effect　of　temperature　during　weathering　aging　process.　©　2020　Elsevier　Ltd

关键词：

Temperature Thermal aging Solar radiation Viscosity Asphalt mixtures Rheology Asphalt pavements Weathering Chemical analysis Deterioration

作者机构：

[ 1 ] [Hu, Mingjun]The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai; 201804, China
[ 2 ] [Sun, Guoqiang]Department of Road and Railway Engineering, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Sun, Daquan]The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai; 201804, China
[ 4 ] [Lu, Tong]The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai; 201804, China
[ 5 ] [Ma, Jianmin]The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai; 201804, China
[ 6 ] [Deng, Yue]The Key Laboratory of Road and Traffic Engineering, Ministry of Education, Tongji University, Shanghai; 201804, China

通讯作者信息：

[sun, daquan]the key laboratory of road and traffic engineering, ministry of education, tongji university, shanghai; 201804, china

电子邮件地址：

dqsun@tongji.edu.cn

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