China Plastics ›› 2025, Vol. 39 ›› Issue (7): 80-86.DOI: 10.19491/j.issn.1001-9278.2025.07.013

• Processing and Application • Previous Articles     Next Articles

Performance evaluation of SBS⁃straw carbon composite modified asphalt

ZHAO Dan1, SUO Shuwu1, SHEN Jiyong2, WANG Peng3, LI Haibin4,5(), LI Zhigang4,5   

  1. 1.Shangluo Highway Bureau,Shangluo 726000,China
    2.Shangluo Highway Bureau Road Maintenance Machinery Repair Factory,Shangluo 726000,China
    3.Survey and Design Office of Shangluo Highway Bureau,Shangluo 726000,China
    4.School of Architecture and Civil Engineering,Xi′an University of Science and Technology,Xi′an 710054,China
    5.Road Engineering Research Center,Xi′an University of Science and Technology,Xi′an 710054,China
  • Received:2024-08-08 Online:2025-07-26 Published:2025-07-22

Abstract:

Straw carbon (SC), as a sustainable material derived from agricultural waste, offers a novel approach for resource utilization in asphalt pavement applications. This study investigated the composite modification of base asphalt using SC and styrene⁃butadiene⁃styrene (SBS) through comprehensive performance evaluation, including fundamental property tests, high/low⁃temperature rheological assessments, and aging resistance analysis. Results demonstrated that SC's large specific surface area and porous structure enhanced asphalt interaction by increasing contact area and absorbing light components. At optimal concentrations (4 wt% SBS and 12 wt% SC), the SBS⁃SC modified asphalt (SBS⁃SCMA) exhibited significant improvements in penetration, softening point, viscosity, complex shear modulus, and phase angle, achieving superior high⁃temperature performance. Notably, SC enhanced aging resistance by mitigating high⁃temperature performance degradation in SBS⁃modified asphalt. However, reduced 5 ℃ ductility, increased creep stiffness (S), and decreased creep rate (m) indicate compromised low⁃temperature performance, suggesting this composite is particularly suitable for asphalt pavements in warmer climates. These findings provide valuable insights for sustainable asphalt modification using agricultural waste materials.

Key words: styrene?butadiene?styrene modified asphalt, straw carbon, SBS composite modified asphalt, rheological properties, aging resistance

CLC Number: