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

• 加工与应用 • 上一篇    下一篇

SBS⁃秸秆生物炭复合改性沥青性能评价

赵丹1, 索书武1, 沈继勇2, 王鹏3, 李海滨4,5(), 李志刚4,5   

  1. 1.商洛市公路局,陕西 商洛 726000
    2.商洛公路管理局养路机械修理厂,陕西 商洛,726000
    3.商洛公路管理局勘察设计室,陕西 商洛,726000
    4.西安科技大学建筑与土木工程学院,西安 710054
    5.西安科技大学道路工程研究中心,西安 710054
  • 收稿日期:2024-08-08 出版日期:2025-07-26 发布日期:2025-07-22
  • 通讯作者: 李海滨(1980-),男,教授,研究方向为废旧材料在道路沥青的循环再利用,lihaibin1212@126.com
    E-mail:lihaibin1212@126.com
  • 基金资助:
    国家自然科学基金(52308466);陕西省交通运输科研项目(24?20K)

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
  • Contact: LI Haibin E-mail:lihaibin1212@126.com

摘要:

秸秆生物炭(SC)是一种由秸秆废弃物制备的炭,将其应用于道路沥青路面,是农林废弃物在道路沥青领域的资源化利用新途径,为秸秆废弃物在道路沥青的应用提供了新思路。本文采用SC及苯乙烯⁃丁二烯⁃苯乙烯(SBS)对基质沥青进行复合改性,通过基本性能试验、高低温性能试验及抗老化性能试验,综合研究并分析了SC对SBS⁃SC复合改性沥青(SBS⁃SCMA)的性能影响。结果表明,SC较大的比表面积增加了与沥青的接触面积,多孔结构易吸收沥青轻质组分。在SBS掺量为4 %时,SC的最佳掺量为12 %,此时SBS⁃SCMA的针入度、软化点、黏度、复数剪切模量、相位角均出现明显变化,复合改性沥青的高温性能相对最佳;SC能够减小复合改性沥青在老化后的高温性能损失,表现出优异的高温抗老化性;但其5 ℃延度下降,蠕变劲度模量S上升,蠕变速率m下降,说明SBS⁃SCMA低温性能受到SC的影响,该复合改性沥青更适用于温暖地区的沥青路面。

关键词: 苯乙烯?丁二烯?苯乙烯改性沥青, 秸秆生物炭, 苯乙烯?丁二烯?苯乙烯?生物炭复合改性沥青, 流变性能, 抗老化性能

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

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