Aging Characteristics of Rubber Modified Bitumen Mixed with Sulfur after Terminal Blend Process

Sheng Wang, Weidong Huang, Xueyan Liu and Peng Lin
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Sheng Wang: Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Tongda Building, 4800 Cao’an Road, Shanghai 201804, China
Weidong Huang: Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Tongda Building, 4800 Cao’an Road, Shanghai 201804, China
Xueyan Liu: Section of Pavement Engineering, Department of Engineering Structures, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands
Peng Lin: Section of Pavement Engineering, Department of Engineering Structures, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands

Sustainability, 2022, vol. 14, issue 5, 1-16

Abstract: The influence of sulfur on the chemical, rheological, and aging resistance of terminal blend rubberized bitumen (TBRB) was studied. TB hybrid bitumen (TBHB) was prepared from with different sulfur contents (0.1, 0.2, 0.3, 0.4 wt%) and TBRB prepared with neat bitumen and crumb rubbers at 20% content. TBHB binders were aged by rolling thin film oven test (RTFOT) and pressure aging vessel (PAV), respectively. The chemical composition of TBHB binders was monitored by attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR). Rheological properties of all TBHB samples were tested. Chemical composition results show that TBHB can inhibit the degradation of polybutadiene compared with TBRB in the RTFOT stage, and the polybutadiene degradation is the main process of TBHB in the RTFOT stage, while the TBHB is mainly desulfurized after PAV aging. Meanwhile, the increase in sulfur content in the TBHB can improve the desulfurization degree of the TBHB binder after PAV. TBRB containing sulfur can improve the mechanical properties and elasticity and reduce the hardening degree during aging. Moreover, blending sulfur into the TBRB caused a lower complex modulus aging index after aging, which indicates that TBHB has superior aging resistance.

Keywords: terminal blend rubberized bitumen; aging; ATR-FTIR; rheological properties; aging resistance (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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