| 摘要: |
| 测试了沥青改性环氧树脂材料的力学性能和冲蚀磨损性能，研究了沥青掺量（质量分数）对环氧树脂力学性能和冲蚀磨损性能的影响，并分析了其冲蚀磨损机理.结果表明：沥青的加入降低了环氧树脂的拉伸强度，但在一定程度上提高了其冲击韧性；沥青改性环氧树脂材料的冲蚀行为表现出半塑性材料的冲蚀特征，最大冲蚀率出现在冲蚀角为45°时，其冲蚀率随冲蚀速率增加而增大，冲蚀率与冲蚀速率呈幂函数关系，速率指数为274～317；沥青掺量为10%时，沥青改性环氧树脂表现出良好的冲蚀抗力，适合用作强风沙流地区混凝土桥梁墩身等的冲蚀磨损防护材料；沥青改性环氧树脂材料的冲蚀是冲蚀能量法向分量和切向分量共同作用的结果，法向分量使材料表面产生裂纹和破碎，切向分量使材料表面产生切削. |
| 关键词: 沥青 环氧树脂 冲蚀磨损 |
| DOI：103969/j.issn.1007 9629201705025 |
| 分类号: |
| 基金项目:长江学者和创新团队发展计划滚动支持项目(IRT_15R29)；兰州交通大学（201606）优秀平台支持项目 |
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| Erosion Properties of Asphalt Modified Epoxy Resin |
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WANG Yanping1, GUO Dengfeng1, FENG Libang1, ZHANG Rongling2, WANG Qicai2
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1.School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;2.School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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| Abstract: |
| The mechanical properties and erosion properties of asphalt modified epoxy resin were tested, and the effect of asphalt content(by mass) on these properties was studied, and the mechanism of erosion was analyzed. The results show that the addition of asphalt decreases the tensile strength of the epoxy resin, but to a certain extent, improves the impact toughness of the epoxy resin. The asphalt modified epoxy resin indicates semi ductile erosion behavior with peak erosion rate at 45° impact angle, and its erosion rate increases with increasing erosion velocity and shows power function relationship with erosion velocity, and the velocity index is 274317 Asphalt modified epoxy resin shows good erosion resistance when asphalt content is 10%. It is suitable for concrete bridge piers as erosion protective material under wind sand flow environment. The erosion of asphalt modified epoxy resin is the result of combined action of normal component and tangential component for erosion energy, in which the normal component causes crack and breakage of material surface, and the tangential component causes cutting of material surface. |
| Key words: asphalt epoxy resin erosion |
