| 摘要: |
| 通过改变玄武岩纤维规格与掺量，研究了玄武岩纤维沥青胶浆抗剪性能、抗裂性能及高温流变性能的变化规律，并借助扫描电镜（SEM）对其微观机理进行了分析.结果表明：玄武岩纤维的掺加大幅提高了沥青胶浆的极限拉力（最高约为原沥青胶浆的45倍）；高温流变性能显著提高，PG分级由PG70提升至PG76；在玄武岩纤维端部，沥青呈突起状，有利于纤维相互桥接形成网状结构，使其应力分散，从而提高了沥青混合料的稳定性. |
| 关键词: 玄武岩纤维 沥青胶浆 板带拉伸试验 微观机理 |
| DOI：103969/j.issn1007 9629201604009 |
| 分类号: |
| 基金项目:浙江省交通运输厅科技项目（2012H25） |
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| Experimental Study on Road Performance of Basalt Fiber Reinforced Bitumen Mastics |
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QIN Xiao, SHEN Aiqin, GUO Yinchuan
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School of Highway, Changan University, Xian 710064, China
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| Abstract: |
| The shear performance, crack resistance and high temperature rheological properties of basalt fiber reinforced bitumen mastics with different sizes and contents of basalt fiber were investigated. Their microscopic mechanism was analyzed by scanning electron microscope(SEM). The result shows that the basalt fiber greatly influences the ultimate tension of bitumen mastics（around 45 times as great as original pitch at best） and significantly improves the high temperature rheological properties. The PG standard is promoted from PG70 to PG76. A network structure was formed by bitumen at both ends of the fibers which was able to disperse stress and contributed to the stability of bituminous mixture. |
| Key words: basalt fiber bitumen mastic strip tensile test microscopic mechanism |
