塑料科技2025，Vol.53Issue(5)：66-73,8.DOI:10.15925/j.cnki.issn1005-3360.2025.05.013
胶粉-SBS复合改性沥青低温黏弹性能评价
Evaluation of Low Temperature Viscoelastic Properties of Rubber Powders-SBS Composite Modified Asphalt
摘要
Abstract
The service life of asphalt pavement is closely related to the low-temperature crack resistance of asphalt.To investigate the effects of multiple factors such as crumb rubber content,stress level,and temperature on the low-temperature crack resistance of composite modified asphalt,the bending beam rheometer(BBR)test was used to evaluate the creep behavior of composite modified asphalt under multiple temperature gradients and multi-level stress conditions.The low-temperature stiffness modulus(S),low-temperature relaxation performance(m-value),and the modified Burgers model were combined to analyze the low-temperature viscoelasticity of composite modified asphalt and to assess its low-temperature toughness and resistance to multi-level stress cracking.The results show that the addition of crumb rubber helps to increase the low-temperature creep deformation of SBS modified asphalt,mitigate the hardening caused by temperature drop,and enhance its flexibility.Moreover,under multiple temperature gradients and multi-level stress conditions,crumb rubber can significantly improve the low-temperature toughness of composite modified asphalt and enhance its resistance to flexural creep damage.The research findings can provide support for the application of crumb rubber-SBS composite modified asphalt in cold regions.关键词
道路工程/胶粉-SBS复合改性沥青/低温黏弹性/低温柔韧性Key words
Pavement engineering/Rubber powder-SBS composite modified asphalt/Low-temperature viscoelastic property/Low-temperature flexibility分类
交通工程引用本文复制引用
李立顶,王力,许文军,孙锦程,赖淏,师长春,邓威,熊锐..胶粉-SBS复合改性沥青低温黏弹性能评价[J].塑料科技,2025,53(5):66-73,8.基金项目
青海省交通运输厅科技项目(2023-07) （2023-07）
