Interaction effects of crumb rubber modified asphalt binders |
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| Affiliation: | 1. Korea Institute of Construction Technology, 2311, Daehwa-dong, Ilsanseo-gu, Goyang-si, Gyeonggi-do 411-712, South Korea;2. Department of Engineering Technology, Texas State University, San Marcos, TX 78666, United States;3. Department of Civil Engineering, Clemson University, Clemson, SC 29634, United States;4. Regional Infrastructures Engineering, Kangwon National University, Chuncheon 200-701, South Korea;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;2. School of Sciences, Wuhan University of Technology, Wuhan 430070, China;1. Suzhou University of Science and Technology, Suzhou, China;2. Georgia Southern University, Statesboro, GA, USA;3. Lanzhou Jiaotong University, China;4. Auburn University, Auburn, AL, USA;1. School of Transportation, Southeast University, 2 Sipailou, Nanjing 210096, China;2. Jiangsu Sinoroad Engineering Technology Research Institute Co. LTD., Nanjing 211800, China;1. Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China;2. Key Laboratory of Road Structure & Material Ministry of Transport, Chang’an Univ., Xi’an 710064, China;1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Mid South Erhuan Road, Xi’an, Shaanxi 710064, China;2. Shaanxi Construction Engineering Group, New Industrial Zone, Xi’an, Shaanxi 710000, China;3. Highway Administration Bureau of Rizhao City, 7 Yantai Road, Rizhao, Shandong 276800, China;4. China Institute of Geotechnical Investigation and Surveying, 177 Dongzhimen nei Street, Beijing 100007, China;5. Hunan Provincial Communications Planning, Survey & Design Institute Co., Ltd, No. 158 Two Sections Furong North Road, Changsha, Hunan 410008, China |
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| Abstract: | The application of crumb rubber in asphalt mixtures is intended to improve the binder properties by reducing the binder’s inherent temperature susceptibility. This research investigated the interaction effects of CRM binders as a function of various blending treatments in the laboratory. For this study, CRM binders were produced using seven blending times (5, 30, 60, 90, 120, 240, and 480 min), three blending temperatures (177, 200, and 223 °C), and four rubber contents (5%, 10%, 15%, and 20% by weight of asphalt binder). The results from this study showed that (1) The interaction time and interaction temperature for CRM binders were observed to have significant effect on the binder properties; (2) The longer time and higher temperature for interaction of CRM binders resulted in an increase in the high failure temperature and the viscosity. This is thought to be due to the increase in the rubber mass through binder absorption. However, this study found that the control binder of PG 64-22 had little change of the binder properties as a function of interaction conditions; (3) The CRM percentage influence is statistically significant on the viscosity and G*/sin δ values. Also, the asphalt binder with higher CRM percentage showed a higher large molecular size (LMS) value, and the increase in CRM percentage is considered to result in the additional loss of the low molecular weight in the asphalt binder to the CRM. |
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