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Article

Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt

Department of Civil and Environmental Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931-1295, USA
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Sustainability 2020, 12(20), 8383; https://doi.org/10.3390/su12208383
Received: 16 September 2020 / Revised: 2 October 2020 / Accepted: 9 October 2020 / Published: 12 October 2020
(This article belongs to the Special Issue Towards Sustainable Pavement Materials and Structures)
Emulsified asphalt has been widely used in various surface treatment methods such as chip seal for low-volume road preservation. Using modified emulsified asphalt made it possible to use chip seal technology on medium- and even high-volume traffic pavements. The main objective of the study is to quantify the residue characteristics of rubber-modified emulsified asphalt and to assess the effectiveness of using crumb rubber to modify emulsified asphalt binder. The four emulsified asphalt residues used the distillation procedure. Then, the rheology characteristics of emulsified asphalt residue were evaluated. The Fourier transform infrared spectroscopy (FTIR) test analyzed the chemical change of emulsified asphalt during the aging procedure. The results indicate that the evaporation method cannot remove all the water in emulsified asphalt. The mass change during the rolling thin film oven (RTFO) process only represented the component change of emulsified asphalt binder residue. Both the high-temperature and low-temperature performance grade of the two emulsified asphalt binders with rubber were lower. The original asphalt binder adopted to emulsification had a crucial influence on the performance of emulsified asphalt. The rubber modification enhanced the property of the emulsified asphalt binder at low temperatures, and the improvement effect was enhanced as the rubber content in the emulsified asphalt was raised. The C=O band was more effective in quantifying the aging condition of the residue. The findings of this study may further advance the emulsified asphalt technology in pavement construction and maintenance. View Full-Text
Keywords: emulsified asphalt; residue; binder performance; FTIR; aging emulsified asphalt; residue; binder performance; FTIR; aging
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MDPI and ACS Style

Ge, D.; Zhou, X.; Chen, S.; Jin, D.; You, Z. Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt. Sustainability 2020, 12, 8383. https://doi.org/10.3390/su12208383

AMA Style

Ge D, Zhou X, Chen S, Jin D, You Z. Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt. Sustainability. 2020; 12(20):8383. https://doi.org/10.3390/su12208383

Chicago/Turabian Style

Ge, Dongdong, Xiaodong Zhou, Siyu Chen, Dongzhao Jin, and Zhanping You. 2020. "Laboratory Evaluation of the Residue of Rubber-Modified Emulsified Asphalt" Sustainability 12, no. 20: 8383. https://doi.org/10.3390/su12208383

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