摘要
为了研究玻璃纤维对环氧沥青混合料路用性能的影响,采用车辙、小梁弯曲、浸水马歇尔、冻融劈裂及疲劳弯曲试验,考察了0~0.4%玻璃纤维掺量下不同AC级配环氧沥青混合料的路用性能。结果表明:玻璃纤维具有加筋、增韧、阻裂等作用,掺入玻璃纤维能够有效增强环氧沥青混合料的路用性能且高温抗稳定性、低温抗裂性以及抗疲劳性能的增幅效果较为明显;级配公称最大粒径越大,环氧沥青混合料的高温稳定性越好,但其低温抗裂性、水稳定性及抗疲劳性则会越差,因此环氧沥青混合料不建议选择公称最大粒径过大的级配;综合玻璃纤维环氧沥青混合料的路用性能可知,推荐采用掺量为0.3%的玻璃纤维改性,有助于提高环氧沥青混合料的服役质量及使用寿命。
To study the influence of glass fiber on the pavement performance of epoxy asphalt mixture,rutting,beam bending,immersion Marshall,freeze-thaw splitting and fatigue bending tests were carried out to investigate the pavement performance of epoxy asphalt mixture with different AC gradings at 0~0.4%glass fiber content.The results show that glass fiber has the functions of reinforcement,toughening and crack resistance.The addition of glass fiber can effectively enhance the road performance of epoxy asphalt mixture,and the increase effect of high temperature stability,low temperature crack resistance and fatigue resistance is obvious.The larger the nominal maximum particle size of the grading,the better the high-temperature stability of the epoxy asphalt mixture,but the worse the low-temperature crack resistance,water stability and fatigue resistance.Therefore,it is not recommended to select the grading with the nominal maximum particle size too large for epoxy asphalt mixture.According to the road performance of glass fiber epoxy asphalt mixture,it is recommended to use 0.3%glass fiber to modify,which is helpful to improve the service quality and service life of epoxy asphalt mixture.
作者
李艳丽
LI Yanli(Pingdingshan Highway Engineering Quality Testing Center,Pingdingshan 467000,China)
出处
《粉煤灰综合利用》
CAS
2023年第5期60-64,共5页
Fly Ash Comprehensive Utilization
关键词
环氧沥青混合料
玻璃纤维
高温稳定性
低温抗裂性
水稳定性
抗疲劳性能
epoxy asphalt mixture
glass fiber
high temperature stability
low temperature crack resistance
water stability
fatigue resistance
作者简介
李艳丽(1976-),女,本科,高级工程师,主要从事公路工程方面研究工作。
