长沙理工大学学报（自然科学版）2025，Vol.22Issue(5)：31-43,13.DOI:10.19951/j.cnki.1672-9331.20250505001
废胶粉/纤维复掺降噪增韧型沥青混合料性能研究
Research on performance of noise-reducing and toughness-enhancing asphalt mixtures with waste tire rubber powder and fiber composite addition
摘要
Abstract
[Purposes]This study aims to develop an asphalt mixture with an integrated noise reduction function and excellent pavement performance by utilizing waste tire rubber powder(WTRP)and composite fibers,thereby achieving the dual goals of traffic noise control and resource utilization of waste tires.[Methods]The dry process was adopted to replace the fine aggregates of the same size with 8-mesh WTRP(the content of each is referred to as"volume fraction in the aggregate",with values of 1.5%,2.0%,2.5%,and 3.0%,respectively)in the same volume,and composite fibers(the content of each is referred to as"mass fraction in the aggregate",with a value of 0.4%;the mass ratio of basalt fiber to lignin fiber in the composite fiber is 1∶1)were incorporated to prepare a noise-reducing and toughness-enhancing asphalt mixture.The noise reduction performance of the asphalt mixture was comprehensively evaluated through impedance tube-based sound absorption tests,uniaxial compression dynamic modulus tests,and accelerated tire drop tests.Pavement performance tests were conducted to verify its engineering applicability.[Findings]The WTRP content significantly influences the noise reduction performance of the asphalt mixture.When the WTRP content reaches 2.5%,the peak sound absorption coefficient of the mixture increases by 28.6%;the dynamic modulus decreases significantly,and the sound pressure level in the accelerated tire drop test is reduced by 5.4 dB(A).The synergistic effect of WTRP and composite fibers notably enhances the pavement performance of the mixture.At a WTRP content of 2.5%,the mixture exhibits optimal low-temperature crack resistance and water stability,along with excellent high-temperature stability.[Conclusions]The optimal WTRP content is 2.5%.At this dosage,the asphalt mixture achieves the best balance between noise reduction performance and pavement performance.The synergistic effect of WTRP and composite fibers enables dual optimization of noise reduction functionality and material properties.This study provides new insights for the development of functional pavement materials and can effectively promote the resource utilization of waste tires.关键词
沥青混合料/废旧轮胎橡胶粉/纤维/降噪/路用性能Key words
asphalt mixture/waste tire rubber powder/fiber/noise reduction/pavement performance分类
交通工程引用本文复制引用
李盛,刘清,张海涛,袁鹏宇..废胶粉/纤维复掺降噪增韧型沥青混合料性能研究[J].长沙理工大学学报（自然科学版）,2025,22(5):31-43,13.基金项目
国家自然科学基金项目(52378436) （52378436）
湖南省科技创新计划项目(2024RC1053) （2024RC1053）
长沙理工大学研究生实践创新项目(CLSJCX23004) Project(52378436)supported by National Natural Science Foundation of China （CLSJCX23004）
Project(2024RC1053)supported by the Science and Technology Innovation Program of Hunan Province （2024RC1053）
Project(CLSJCX23004)supported by Graduate Practice Innovation Project of Changsha University of Science&Technology （CLSJCX23004）
