| 摘要: |
| 基于纤维改性沥青混凝土路用性能强化提升需求，提出了采用木质素纤维（CF）/玻璃纤维（GF）复合改性沥青混凝土路用性能的方法，研究了复合纤维组成对沥青混凝土路用性能的影响机理.结果表明：CF/GF复合改性有效提升了沥青混凝土的高温稳定性，并具有良好的水稳定性和低温性能；当CF/GF以质量比1∶3掺入时，沥青混凝土动稳定度为单掺CF组的2.2倍；试件低温破坏时，最大弯拉应变提升13.3%.复合纤维具有吸附、加筋及阻滞裂纹的作用，强化了沥青混凝土在温度变化、水损及应力作用下的稳定性，从而提高了其路用耐久性能. |
| 关键词: 沥青混凝土 纤维复合改性 高温性能 低温性能 水稳定性 |
| DOI：10.3969/j.issn.1007-9629.2023.11.008 |
| 分类号:TU528.041 |
| 基金项目:国家自然科学基金资助项目（U22B2076， 51878480， 52078369）；中央高校基本科研业务费专项资金资助项目；2021年产业技术基础公共服务平台项目（2021-H029-1-1）；上海市优秀学术带头人计划（22XD1403300）；“十四五”国家重点研发计划项目（2022YFC3803104）；国家留学基金委资助项目（202206260066） |
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| Composite Modification with Cellulose Fiber/Glass Fiber to Enhance the Pavement Performance of Asphalt Concrete |
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XIE Mingjun1,2, WEN Yutong1,2, XU Linglin1,2, WU Kai1,2, JIANG Zhengwu1,2
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1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， Tongji University， Shanghai 201804， China;2.School of Materials Science and Engineering， Tongji University， Shanghai 201804， China
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| Abstract: |
| Cellulose fiber（CF） and glass fiber（GF） have been selected for asphalt concrete reinforcement to cope with the drawbacks of insufficient enhancement in comprehensive properties. Furthermore， the mechanism of fiber composite modification was explored by determining the pavement performance of asphalt concrete with varying proportions of CF/GF. The results indicate that the composite modification process of CF/GF improves high-temperature property， low-temperature performance and water stability of asphalt concrete effectively. As the mass ratio of CF/GF is 1∶3 in asphalt concrete， the dynamic stability is 2.2 times that of the CF modified asphalt concrete. The maximum flexural-tensile strain is 13.3% higher than that of the CF modified asphalt concrete when the specimens are subjected to low-temperature damage. This enhancement can be attributed to the functional aspects which is originated from the adsorption， reinforcement， and crack retarding of composite fibers in the matrix of asphalt concrete， thus the durability is improved under the coupling effects of temperature changes， moisture damage， and stress loading. |
| Key words: asphalt concrete fiber composite modification high-temperature performance low-temperature performance moisture stability |
