不同纤维对沥青混凝土路用性能的影响  

Effect of Different Fibers on Pavement Performance of Asphalt Concrete

作　　者：吴超 WU Chao(Jiangxi Jiaogong Municipal Construction Engineering Co,Ltd,Nanchang 330100,China)

机构地区：[1]江西交工市政建筑工程有限公司,南昌330100

出　　处：《建材世界》2024年第6期13-16,共4页The World of Building Materials

摘　　要：该研究对比分析了不同掺量的玄武岩纤维和木质素纤维对沥青混凝土路用性能的影响,主要涉及高温性能、低温性能和水稳定性。结果表明两类纤维均能显著提升沥青混凝土的主要路用性能,但需合理控制纤维的掺量。当木质素纤维掺量为0.3%、玄武岩纤维掺量为0.4%时,沥青混凝土的高温性能和低温性能均达到最佳:动稳定度分别提升了53.4%和73.1%;低温弯拉应变分别增加了20.3%和11.9%。当纤维掺量不超过0.4%时,沥青混凝土的水稳定性也得到了持续改善。综合考虑纤维沥青混凝土的路用性能和经济成本,当侧重沥青混凝土的高温性能时,建议采用玄武岩纤维,将其掺量保持在0.4%;当侧重沥青混凝土的低温性能和水稳定性时,建议采用木质素纤维,将其掺量保持在0.3%。This study compares and analyzes the effects of different dosages of basalt fiber and lignin fiber on the pavement performance of asphalt concrete,mainly involving high temperature performance,low temperature performance,and water stability.Results indicate that both types of fibers can significantly improve the main pavement performance of asphalt concrete,but the fiber dosage needs to be reasonably controlled.When the dosage of lignin fiber is 0.3%and the dosage of basalt fiber is 0.4%,the high-temperature performance and low-temperature performance of asphalt concrete reach the best:the dynamic stability is improved by 53.4%and 73.1%,respectively,and the low-temperature bending and tensile strain increased by 20.3%and 11.9%,respectively.When the fiber dosage does not exceed 0.4%,the water stability of asphalt concrete is continuously improved.Considering the pavement performance and economic cost of fiber-reinforced asphalt concrete,when focusing on the high-temperature performance,it is recommended to use basalt fiber and maintain its dosage at 0.4%.When focusing on the low-temperature performance and water stability,it is recommended to use lignin fibers and maintain its dosage at 0.3%.

关 键 词：玄武岩纤维 木质素纤维 沥青混凝土 路用性能 

分 类 号：U414[交通运输工程—道路与铁道工程]