Performance of microalgae oil modified asphalt and mixture

Authors

WU Jingjiang, 1. Communications Construction Company of CSCEC 7th Division Corp. Ltd, Zhengzhou, Henan 450000, China;Follow
CHU Fuke, 2. R&D Center of Highway Construction and Maintenance Technology, Materials, and Equipment for Transportation Industry, Zhengzhou, Henan 450000, China; 3. Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou, Henan 450000, China; 4. Henan Key Laboratory of Solid Waste Material Road Engineering Recycling, Zhengzhou, Henan 450000, China;
YIN Weiyong, 2. R&D Center of Highway Construction and Maintenance Technology, Materials, and Equipment for Transportation Industry, Zhengzhou, Henan 450000, China; 3. Henan Provincial Communications Planning & Design Institute Co., Ltd., Zhengzhou, Henan 450000, China; 4. Henan Key Laboratory of Solid Waste Material Road Engineering Recycling, Zhengzhou, Henan 450000, China;
ZHANG Yong, 5. China Construction Seventh Engineering Division Corp., Ltd., Zhengzhou, Henan 450000, China
SHI Haixia, 5. China Construction Seventh Engineering Division Corp., Ltd., Zhengzhou, Henan 450000, China

Abstract

In order to alleviate the shortage of petroleum asphalt and explore the applicability of microalgae oil in the field of modified asphalt, the composition of microalgae oil, as well as the conventional properties and rheological properties of modified asphalt at high and low temperatures were studied by four-component analysis, three index tests, high temperature shear rheology tests, and low temperature bending creep tests. The performance of microalgae oil-modified asphalt mixture was studied by Marshall test, high temperature rutting, and low temperature bending test. The results show that the microalgae oil is similar to the gel asphalt structure with more hard components. With the increase in microalgae oil content, the softening point of modified asphalt gradually increases, and the ductility and penetration degree gradually decrease. When the content of microalgal oil is 30%, the softening point of modified asphalt is above 60 °C; the high temperature performance is PG 70 before and after aging, and the dynamic stability of the mixture is above 5 000 times/mm; the bending strain at low temperature is higher than 2 500 με, indicating great comprehensive performance. In order to ensure good high and low temperature performance, the content of microalgae oil in microalgae oil-modified asphalt should be 20%–30%.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.035

First Page

208

Last Page

213

Submission Date

March 2025

Recommended Citation

Jingjiang, WU; Fuke, CHU; Weiyong, YIN; Yong, ZHANG; and Haixia, SHI (2023) "Performance of microalgae oil modified asphalt and mixture," Journal of China & Foreign Highway: Vol. 43: Iss. 5, Article 35.
DOI: 10.14048/j.issn.1671-2579.2023.05.035
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss5/35

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