China Plastics ›› 2025, Vol. 39 ›› Issue (8): 100-106.DOI: 10.19491/j.issn.1001-9278.2025.08.016

• Plastic and Environment • Previous Articles     Next Articles

Preparation and properties of crack⁃resistant asphalt based on waste rubber powders

XIONG Kewei1, ZHANG Mingming2, LIU Wenjing3, ZHANG Zixuan1, CAO Dongwei1,2,3,4(), XIA Lei4, WEI Hongmei5, HUO Shufang6   

  1. 1.School of Civil Engineering,Hebei University of Engineering,Handan 056038,China
    2.School of Materials Science and Engineering,Chang′an University,Xi′an 710064,China
    3.School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China
    4.China?Road Transportation Verification & Inspection Hi?Tech Co,Ltd,Beijing 100088,China
    5.Operation Branch of Xinjiang Communications Investment (Group) Co,Ltd,Urumqi 830009,China
    6.Hengshui Jinhu Transportation Development Group Co,LTD,Hengshui 053000,China
  • Received:2024-09-27 Online:2025-08-26 Published:2025-07-30

Abstract:

This study developed a novel composite crack⁃resistant asphalt by modifying asphalt with styrene⁃butadiene⁃styrene (SBS) and waste rubber powder, with the optimal formulation determined through response surface methodology. The optimized composition consisted of 4 wt% SBS, 15 wt% rubber powders, and 4 wt% toughening agent. Comprehensive performance evaluation was conducted using basic property tests, Brinell viscosity measurements, tensile testing, temperature scanning, and bending beam rheometry, and the results revealed superior low⁃temperature performance and tensile resistance, with exceptional ductility (54 cm) and elastic recovery (99 %). Compared to conventional SBS/rubber powder⁃modified asphalt, the currently developed asphalt demonstrated 78 % greater ductility and 11 % improved elastic recovery. Fluorescence microscopy analysis indicated that the enhanced performance stemmed from the formation of a uniform, compact microstructure through synergistic crosslinking of multiple modifiers. This unique microstructure provides excellent resistance to temperature fluctuations and mechanical stress, making the composite particularly effective for crack prevention.

Key words: road engineering, composite modified asphalt, extensibility, crack resistance property, asphalt pavement

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