Physical, Rheological and Stability Properties of Desulfurized Rubber Asphalt and Crumb Rubber Asphalt
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The objective of this study was to evaluate binder characterization of the desulfurized rubber asphalt (DRA) and crumb rubber asphalt (CRA) with different contents and compare those materials with available virgin asphalt (VA). The effects of desulfurized rubber and regular rubber on VA were investigated from the physical, rheological and stability properties point of view. The results indicated that DRA had the similar physical and rheological performances with CRA, but DRA was much better in improving storage property. The desulfurized rubber could integrate into asphalt to perform both chemical reaction and physical swelling while crumb rubber mainly dispersed incompatibly in asphalt. The chemical fusion in DRA could provide much better rutting resistance and stability performance in high temperature and increase the low-temperature performance. Although the asphalt characterization was enhanced with increasing rubber contents, excessive rubber addition could not get much better performance improvement. It was recommended that 15–20% desulfurized rubber content was optimum for designing asphalt rubber mixture to acquire improved performance and long storage stability. Overall, the long storage of DRA would provide asphalt rubber technology a much wider range of service and adaption in the road field construction.
KeywordsAsphalt binder Desulfurized rubber Crumb rubber Rheology Stability properties
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The projectwas supported by the Shaanxi Science and Technology Project (No. 2018SF-364) and the Qinghai Transportation Science and Technology Project (No. 2017-ZJ-763), the Fundamental Research Funds for the Central Universities of China (Nos. 310831153409, 300102218502 and 300102318401).
- 9.Ghavibazoo, A.; Abdelrahman, M.: Effect of crumb rubber modification on short term aging susceptibility of asphalt binder. Int. J. Pavement Res. Technol. 7(4), 297–304 (2014). https://doi.org/10.6135/ijprt.org.tw/2014.7(4).297 Google Scholar
- 17.Sugiyanto, G.: Characterization of asphalt concrete produced from scrapped tire rubber. Eng. J. 21(4) (2017). https://doi.org/10.4186/ej.2017.21.4.193
- 18.Ni, Y.; Liao, M.Y.; Li, X.: Preparation process and properties of crumb rubber modified asphalt. Acta Scientiarum Naturalium Universitatis Sunyatseni 44, 33–35 (2005)Google Scholar
- 28.Way, G.B.; Kaloush, K.E.; Biligiri, K.P.: Asphalt-Rubber Standard Practice Guide, 2nd edn., Prepared for the Rubber Pavements Association, USA. http://www.rubberpavements.org/Library_Information AR_Std_Practice_Guide_20111221.pdf (2012). Aaccessed 27 March 2018
- 29.Bahia, H U.; Davies, R.: Factors controlling the effect of crumb rubber on critical properties of asphalt binders. J. Assoc. Asphalt Paving Technol. 64. http://worldcat.org/issn/02702932(1995). Accessed on 27 March 2018
- 31.Lee, S.J.: Effects of reaction time on physical and chemical properties of rubber modified binders. Doctoral dissertation, Clemson University. https://www.researchgate.netpublication/242360812_Effects_of_Reaction_Time_on_Physical_and_Chemical_Properties_of_Rubber-modified_Binders (2006). Accessed on 30 March 2018
- 34.Standard test methods of bitumen and bituminous mixtures for highway engineering (JTG E20-2011). China Communications Press, China (2011)Google Scholar