通过海藻酸盐隔间纤维包裹再生剂增强沥青胶浆混合物的韧性和愈合性  

Reinforcement and Healing of Asphaltmastic Mixtures by Rejuvenatorencapsulation in Alginate Compartmented Fibres

作　　者：刘海霞 LIU Hai-xia(Huangyuan Highway General Section of Qinghai Province,Xining 812100,China)

机构地区：[1]青海省湟源公路总段,西宁812100

出　　处：《价值工程》2024年第18期102-104,共3页Value Engineering

基　　金：青海省交通科技项目;高海拔寒区沥青路面养护用绿色智能自修复再生沥青混合料关键技术研究;编号:HYZD-KT-2023-01。

摘　　要：本文探讨了利用分隔式海藻酸盐纤维作为活化剂引入沥青路面混合料的新方法的潜力。研究中使用分隔式纤维进行局部分布活化剂,并解决了球形胶囊和中空纤维所带来的问题。通过封装过程验证了纤维在沥青混合物中的存活率,证明海藻酸盐作为封装材料的有效性,并展示了其在沥青生产过程中的存活能力。测试结果表明,纤维具有适当的热力学和力学强度,能够在沥青混合和压实过程中存活下来。显微镜分析证实了纤维完整无损地存在于沥青砂浆混合物中,进一步证明了纤维在沥青生产过程中的存活。环境扫描电子显微镜和光学显微镜分析揭示了纤维的生理特性以及其释放活化剂到沥青胶泥裂缝中的能力。将含有活化剂的分隔式海藻酸盐纤维嵌入沥青胶泥混合物中,并对沥青胶泥试样进行了三点弯曲测试,证明了海藻酸盐纤维为自愈沥青路面系统的开发提供了一种有前景的新方法。This article explores the potential of using separated alginate fibers as activators to introduce new methods into asphalt pavement mixtures.In the study,separated fibers were used for local distribution of activators,and the problems caused by spherical capsules and hollow fibers were solved.The survival rate of fibers in asphalt mixtures was verified through the encapsulation process,demonstrating the effectiveness of alginate as a encapsulation material and demonstrating its survival ability in asphalt production.The test results indicate that the fibers have appropriate thermodynamic and mechanical strength and can survive during asphalt mixing and compaction processes.Microscopic analysis confirmed that the fibers exist intact and undamaged in the asphalt mortar mixture,further proving the survival of fibers in the asphalt production process.Environmental scanning electron microscopy and optical microscopy analysis revealed the physiological characteristics of fibers and their ability to release activators into asphalt cement cracks.Partitioned alginate fibers containing activators were embedded into asphalt binder mixtures,and three-point bending tests were conducted on asphalt binder samples,proving that alginate fibers provide a promising new method for the development of self-healing asphalt pavement systems.

关 键 词：自修复 沥青路面 隔室纤维 海藻酸钠 再生 

分 类 号：U418.1[交通运输工程—道路与铁道工程]