Study on the Mechanical Properties of Rubber Asphalt by Molecular Dynamics Simulation
- 63 Downloads
Introducing the crumb rubber into asphalt binder not only can improve the performances of asphalt binder significantly but also can recycle the waste tire economically. However, rubber asphalt presents different mechanical property for the complex sources of crumb rubber. In this study, rubber was classified according to the application situation and the components of tires and three kinds of rubber were selected as the representative of commonly used rubber. Afterwards, molecular dynamics simulations including molecular modelling, dynamics calculation, and mechanical properties analysis were conducted for rubber asphalt with the obtained rubber based on Materials Studio 8.0 software. The variation of mechanical properties of rubber asphalt with rubber contents and rubber types was investigated. The results show that the optimum rubber contents for the tire tread of passenger car, the tire tread of truck, and the tire sidewall are 15%, 5~10%, and 15% respectively. Moreover, rubber from the tire tread of passenger car and the tire sidewall should be given priority for actual applications in rubber asphalt.
KeywordsRubber asphalt Rubber classification Mechanical properties Molecular dynamics simulation
This study was funded by National Key R&D Program of China (Grant No. 2018YFE0103800), National Natural Science Foundation of China (Grant No. 5197081751), and Innovation Talent Promotion Program-Scientific and Technological Innovation Team in Shaanxi Province (Grant No. 2017KCT-13).
Compliance with Ethical Standards
Conflict of Interest
The authors declare that they have no conflict of interest.
- 3.Way GB (2000) OGFC meets CRM where the rubber meets the rubber 12 years of durable success. Asphalt Rubber:15–31Google Scholar
- 20.Rubber Manufacturer's Association (2014). USA.Google Scholar
- 25.Zhang H (2011) Study on asphalt modified with scrap passenger car tire rubber [master’s thesis]. Shanghai Jiao Tong University, Shanghai, p 2011Google Scholar
- 27.ASTM D4124-09. Standard test method for separation of asphalt into four fractions. Annual Book of the ASTM standards 2009; 2009.Google Scholar
- 29.Jennings PW, Pribanic JA, Desando MA, et al. Binder characterization and evaluation by nuclear magnetic resonance spectroscopy. Washington, DC 20001: The National Academies of Sciences, Engineering, and Medicine; 1993. (Publication; No. SHRP-A-335).Google Scholar
- 35.Zhang Y, Sun M (2012) Rubber variety and performance manual. Chemical Industry Press, Beijing (CN)Google Scholar