Journal of South China University of Technology(Natural Science) >

2024 , Vol. 52 >Issue 3: 41 - 49

DOI: https://doi.org/10.12141/j.issn.1000-565X.230121

Materials Science & Technology

Foaming Technology and Rheological Characteristics of Surfactant Additive-Foamed Asphalt

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  • 1.Key Laboratory of Road and Traffic Engineering，Ministry of Education，Tongji University，Shanghai 200082，China
    2.Penn State University，Penn State 16601，USA
    3.Jiangxi Traffic Engineering Group Co. ，Ltd. ，Nanchang 330000，Jiangxi，China
    4.Shanghai Daochun Transportation Technology Co. ，Ltd. ，Shanghai 215300，China
陶卓辉（1981-），男，博士生，主要从事道路工程材料研究。E-mail： 1811459@tongji.edu.cn

Received date: 2023-05-30

  Online published: 2023-06-20

Supported by

the National Natural Science Foundation of China(51808228); the Natural Science Foundation of Guangdong Province(2023A1515030287，2022A1515011607); the Science and Technology Project of Jiangxi Pransportation Department(2020Q0019)

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Abstract

Warm mix asphalt technology can reduce the production and construction temperature of asphalt mixtures, and has great application potential in energy conservation and carbon reduction. The foamed warm mix asphalt technology has the advantage of low cost, but there are some problems such as the unsatisfactory foaming effect of modified asphalt and the insignificant warm mix effect, so it has potential application prospects. Surfactants have the effects of both “asphalt lubricant” and “foam stabilizer”, which makes it possible to improve the foaming characteristics and warm mix effect of foamed warm mixed asphalt. Based on this, this study prepared surfactant additive foamed asphalt (SAFB6, SAFB8, SAF10) with different mass fractions of surfactant additives and foaming temperatures. The foaming test, dynamic shear rheology test and bending beam rheology test were used to investigate foaming properties, high temperature performance, fatigue resistance and low temperature performance. The mechanism was analyzed by Fourier infrared spectroscopy test, and the synergistic effect of both surfactant and foaming process on the performance of foamed warm mix asphalt was revealed. The experimental results show that surfactant additives had a significant synergistic effect on the foaming properties of SBS modified asphalt, especially the half-life, which reached up to 69 s. The best foaming conditions can be achieved when the foaming temperature and surfactant additives content are 170 ℃ and 8%, respectively. No complex chemical reaction occurs during the preparation of SAFB asphalt, but the foaming process resulted in a certain degree of oxidation of SBS modified asphalt. The synergistic effect of the surfactant additives and foaming process improves the high temperature performance and fatigue resistance of the SBS modified asphalt, while the low temperature crack resistance is equivalent to that of SBS modified asphalt. Generally, the combination of surfactant and foaming technology is feasible, which improves the foaming effect and road performance of SBS modified asphalt.

Key words： foamed warm mix asphalt; surfactant additive; foaming behavior; rheological property

Cite this article

TAO Zhuohui, SHEN Shihui, SUN Yang, et al . Foaming Technology and Rheological Characteristics of Surfactant Additive-Foamed Asphalt[J]. Journal of South China University of Technology(Natural Science), 2024 , 52(3) : 41 -49 . DOI: 10.12141/j.issn.1000-565X.230121

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