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| 蔗渣纤维制备工艺及其沥青胶浆流变行为 |
| Preparation Process of Bagasse Fiber and Rheological Behavior of Asphalt Mastic |
| 投稿时间：2025-12-03 |
| DOI：10.16018/j.cnki.cn32-1650/n.202601001 |
| 中文关键词: 沥青路面 蔗渣纤维 湿法制备 流变行为 界面增强 |
| 英文关键词: asphalt pavement bagasse fiber wet preparation rheological behavior interfacial enhancement |
| 基金项目:广西自然科学基金面上项目(2024GXNSFAA010308)；南宁市重点研发计划项目(20223039)；广西交通运输科技成果推广项目(GXJT-ZDSYS-2023-03-01) |
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| 中文摘要: |
| 为提升蔗渣纤维的工程适用性并揭示其增强沥青胶浆流变性能的机制，基于Image-Pro Plus 6.0图像分析系统研究了湿法制备工艺(料水比1:5、1:10，剪切时间30~120 s)，结合动态剪切流变仪和弯曲梁流变仪探究了纤维形态与流变行为的关联性。提出了浸泡预处理协同动态剪切调控的创新策略，浸泡24 h通过破坏氢键网络软化纤维结构，促使剪切模式由脆性断裂转为层间滑移，制备出长径比5.79、1~6 mm占比82.4%的均质纤维。流变试验表明，掺入3%蔗渣纤维的沥青胶浆车辙因子提升至6.56 kPa(58 ℃)，劲度模量达726 MPa(-24 ℃)，性能提升源于纤维界面粘结增强与应力分散效应。与木质纤维相比，其综合性能略低，主因后者长径比更高及疏水性优化了三维网络致密性。 |
| 英文摘要: |
| To enhance the engineering applicability of bagasse fiber and elucidate its mechanism in reinforcing the rheological properties of asphalt mastic, this study investigated the wet preparation process (solid-to-water ratios: 1:5, 1:10 ; shearing times: 30~120 s) using the Image-Pro Plus 6.0 image analysis system. The correlation between fiber morphology and rheological behavior was further analyzed via Dynamic Shear Rheometer and Bending Beam Rheometer. An innovative strategy of pre-soaking combined with dynamic shearing regulation was proposed: 24-hour soaking disrupted hydrogen bonds to soften the fiber structure, transforming the shearing mode from brittle fracture to interlayer slippage, thereby producing homogeneous fibers with an aspect ratio of 5.79 and 82.4% of fibers in the 1~6 mm range. Rheological tests demonstrated that adding 3% bagasse fibers increased the asphalt mastic's rutting factor to 6.56 kPa (at 58 °C) and stiffness modulus to 726 MPa (at -24 °C), attributed to enhanced interfacial bonding and stress dispersion. However, its overall performance slightly lagged behind wood fiber due to the latter's higher aspect ratio and hydrophobicity-optimized three-dimensional network densification. |
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