Mechanism of Rubber Asphalts Viscosity Reduction by Warm Additives

Authors

JI Jie, 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Beijing Collaborative Innovation Center for Energy Conservation and Emission Reduction, Beijing 100044, China;Follow
MA Tong, 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
REN Wanyan, 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
YANG Yueqin, 3. Kunming Power Supply Bureau, Yunnan Power Grid Co., Ltd., Kunming, Yunnan 650011, China;
ZHANG Ran, 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Beijing Collaborative Innovation Center for Energy Conservation and Emission Reduction, Beijing 100044, China;
ZHENG Wenhua, 4. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China
SUO Zhi, 1. School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2. Beijing Collaborative Innovation Center for Energy Conservation and Emission Reduction, Beijing 100044, China;

Abstract

In order to study the viscosity reduction mechanism of two types of warm mix agents (surfactants and organic waxes) on rubber asphalt, the functional group, micro and nano structures, and morphology of warm mix rubber asphalt were studied based on infrared spectroscopy, atomic force microscopy, and fluorescence microscopy. The results show that the surface-active warm mix agent can significantly increase the amide groups in rubber asphalt and interact with asphaltene and gum to form strong hydrogen bonds, and it can reduce the association force of asphaltene. At the same time, this kind of warm mix agent can form a structural water film on the surface of asphalt particles and rubber particles, resulting in a ball effect, thereby reducing the viscosity of asphalt. The organic wax warm mix agent forms a layer of the wax film by adsorption and wrapping around rubber particles and asphaltene. The lubrication, wrapping, and adsorption of this wax film can reduce the friction between asphaltene and rubber particles and reduce the viscosity of asphalt. The viscosity reduction mechanism of both surfactants and organic wax warm mix agents on rubber asphalt is realized by producing lubrication on the interface of rubber particles and asphalt particles.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.031

First Page

168

Last Page

173

Submission Date

May 2025

Recommended Citation

Jie, JI; Tong, MA; Wanyan, REN; Yueqin, YANG; Ran, ZHANG; Wenhua, ZHENG; and Zhi, SUO (2024) "Mechanism of Rubber Asphalts Viscosity Reduction by Warm Additives," Journal of China & Foreign Highway: Vol. 42: Iss. 6, Article 31.
DOI: 10.14048/j.issn.1671-2579.2022.06.031
Available at: https://zwgl1980.csust.edu.cn/journal/vol42/iss6/31

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