Effect of material composition on nano-adhesive characteristics of styrene-butadiene-styrene copolymer-modified bitumen using atomic force microscope technology |
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| Affiliation: | 1. Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China;2. National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou, 730070, China;1. Braunschweig Pavement Engineering Centre-ISBS, Technische Universität Braunschweig, Beethovenstraße 51b, 38106 Braunschweig, Germany;2. Department of Civil & Environmental Engineering, University of Alaska Fairbanks, Alaska, Fairbanks, AK 99775-5960, USA;1. Faculty of Applied Engineering, EMIB-research Group, University of Antwerp, 171 Groenenborgerlaan, Antwerp 2020, Belgium;2. Nynas N.V., 171 Groenenborgerlaan, Antwerp 2020, Belgium;3. Physical Chemistry and Polymer Science (FYSC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium;1. School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, People’s Republic of China;2. School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, People’s Republic of China;1. Faculty of Applied Engineering, EMIB-Research Group, University of Antwerp, 171 Groenenborgerlaan, Antwerp 2020, Belgium;2. Nynas N.V., 171 Groenenborgerlaan, Antwerp 2020, Belgium;3. Physical Chemistry and Polymer Science (FYSC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium;1. National and Provincial Joint Engineering Laboratory of Road & Bridge Disaster Prevention and Control, Lanzhou Jiaotong University, Lanzhou 730070, China;2. Gansu Province Transportation Planning, Survey & Designing Institute CO., LTD, Lanzhou, 730030, China;1. School of Highway Engineering, Chang’an University, China;2. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China |
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| Abstract: | To investigate the effect of the raw material composition on the nano-adhesive characteristics of styrene-butadiene-styrene (SBS) copolymer-modified bitumen, force-distance curves were obtained to examine the nano-adhesive forces of SBS-modified bitumen samples prepared using different virgin bitumen types, SBS modifiers, an extraction oil, and a stabilizer using atomic force microscopy (AFM). The influence of the composition of the raw materials, such as the virgin bitumen, SBS modifier, extracting oil, and stabilizing agent contents, on the cohesive characteristics were discussed for SBS-modified bitumen. The results show that force-distance curves obtained using AFM can be used to gain insight into nano-adhesive forces of SBS-modified bitumen samples. The force-spectrum technique using AFM can be used to obtain the nano-adhesive forces of the SBS-modified bitumen samples. Neat bitumen has good compatibility with a SBS modifier, which is suitable for forming SBS-modified bitumen with an increased nano-adhesive force. The nano-adhesive force of the branched-shaped SBS-modified bitumen was larger than that of linear-shaped SBS-modified bitumen. The nano-adhesive force of SBS-modified bitumen increased as the SBS modifier and stabilizer contents increased. The nano-adhesive force of the SBS-modified bitumen decreased when the extraction oil content increased. |
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| Keywords: | Styrene-butadiene-styrene copolymer Modified bitumen Materials composition Nano-adhesive characteristics Atomic force microscope |
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