Preparation and rheological properties of eco-friendly SBS-modified warm mix asphalt

Abstract

Abstract: To address the issues of high temperature requirementsexcessive energy consumptionof SBS-modified asphalt during mixing and compaction processes, an environmentally friendly warm-mix additive was developed using pyrolyzed activated rubber powder as the base material. In order to investigate the influence of the warm-mix additive on the rheological properties of SBS-modified asphalt, a systematic experimental study was conducted on the high and low-temperature rheological properties of SBS-modified asphalt with different dosages of pyrolyzed rubber. The results indicated that pyrolyzed rubber has a slight negative effect on the high-temperature rutting resistance of asphalt, with the rutting resistance being comparable to that of the original modified asphalt at 7% dosage. When the dosage is 5%, the modified asphalt has better high-temperature storage stability and low-temperature cracking resistance, and the fatigue performance of the modified asphalt is optimal when the dosage is 3%~5%. Under comprehensive consideration, the optimal dosage of pyrolyzed rubber is between 5% and 7%, at which the modified asphalt can simultaneously achieve good high and low-temperature rheological properties as well as fatigue characteristics.

Key words: pyrolyzed rubber, warm mix additive, SBS-modified asphalt, rheological properties

CLC Number:

U414

ZHANG Lei, ZHU Ying-long, LIN Mei, ZHU Yong-feng, WANG Zhao-li. Preparation and rheological properties of eco-friendly SBS-modified warm mix asphalt[J]. Journal of Lanzhou University of Technology, 2026, 52(2): 22-30.

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URL: https://journal.lut.edu.cn/EN/

https://journal.lut.edu.cn/EN/Y2026/V52/I2/22

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