水稻秸秆纤维对再生沥青混合料抗裂性能影响的研究  

Study on the Influence of Rice Straw Fiber on the Crack Resistance Performance of Recycled Asphalt Mixtures

作　　者：程培峰[1] 郭爽 李艺铭 CHENG Peifeng;GUO Shuang;LI Yiming(College ofCivil Engineering and Transportation,Northeast Forestry University,Harbin150040,China)

机构地区：[1]东北林业大学土木与交通学院,哈尔滨150040

出　　处：《功能材料》2025年第2期2126-2134,共9页Journal of Functional Materials

基　　金：中央高校基本科研业务费专项资金项目(2572022DX09)。

摘　　要：为改善高掺量RAP对路面抗裂性能产生的不利影响,制备了一种含水稻秸秆纤维的高RAP掺量再生沥青混合料,通过半圆弯拉试验(SCB)分析了不同温度下,水稻秸秆纤维的掺入对再生沥青混合料抗裂性能的影响,利用主成分分析方法对掺水稻秸秆纤维再生沥青混合料的抗裂性能建立多角度的综合评价模型。结果表明,水稻秸秆纤维可改善再生沥青混合料的低温抗裂性能,但改善效果受水稻秸秆纤维掺量影响较大,适量的水稻秸秆纤维会在混合料中形成良好的分散效果并起到加筋作用。此外,水稻秸秆纤维对再生沥青混合料低温抗裂性能的改善作用主要以抑制裂缝的发展为主,与未掺水稻秸秆纤维的再生沥青混合料相比,再生沥青混合料的峰后断裂能可提高50%以上。In order to improve the resistance of pavement to cracking and reduce the negative impacts of using a high amount of Reclaimed Asphalt Pavement(RAP)by incorporating rice straw fibers into reclaimed asphalt mixtures with high RAP content.The research involves conducting Semi-circular bending test and pulling tests at various temperatures to analyze the impact of including rice straw fibers on the cracking resistance of recycled asphalt mixtures.Additionally,principal component analysis is utilized to establish a comprehensive evaluation model for the cracking performance of recycled asphalt mixtures with different dosages of rice straw fibers.Based on the findings,the incorporation of rice straw fiber into recycled asphalt mixtures has been shown to enhance their ability to withstand low-temperature cracking.However,the amount of rice straw fiber added to the mixture will determine how well it disperses and strengthens the mixture.The introduction of recycled asphalt mixture results in a significant enhancement in crack resistance in comparison to the addition of rice straw fiber.The fracture energy before failure exhibited a minimum increase of 34.1%,while the fracture energy after failure showed a rise of 57.39%.

关 键 词：再生沥青混合料 水稻秸秆纤维 半圆弯拉试验 抗开裂性能 温度 

分 类 号：U414[交通运输工程—道路与铁道工程]