| 摘要: |
| 通过半圆弯拉试验及扫描电镜（SEM）分析,对掺加0%,03%玄武岩纤维的沥青砂浆试件进行抗裂性能对比研究.结果表明：掺加适当的玄武岩纤维可增强沥青砂浆的力学性能,无预切口试件破坏时的最大荷载提高了162%,临界内聚力提高了143%,有预切口试件破坏时的最大荷载提高了512%,临界断裂能提高了172%;玄武岩纤维的掺加可提高沥青砂浆的黏度,抑制沥青的流动,且沥青对纤维有很好的浸润性,进而增强了两者的黏结力,可在很大程度上降低沥青砂浆的开裂机率. |
| 关键词: 道路工程 玄武岩纤维沥青砂浆 半圆弯拉试验 抗裂性能 临界内聚力 临界断裂能 扫描电镜 |
| DOI：103969/j.issn.1007 9629201905019 |
| 分类号: |
| 基金项目: |
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| Anti cracking Performance of Asphalt Mortar Reinforced by Basalt Fiber |
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YAN Jingchen, ZHENG Jianlong, LI Ningning
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College of Civil Engineering, Inner Mongolia University of Technology, Hohhot 010051, China
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| Abstract: |
| The anti cracking performance of the asphalt mortar with 0% and 03% basalt fibers was compared through semi circular bending test and scanning electron microscope(SEM) analysis. The result shows that adding appropriate amount of basalt fibers can enhance the mechanical performance, for the specimens without notch the max load increases by 162% and the critical cohesion increases by 143% and for the specimens with notch the max load increases by 512% and the critical fracture energy increases by 172%; Basalt fibers can also raise the viscosity of asphalt mortar, suppress the flowability of the asphalt and it is well compatible with asphalt, so the adhesion is enhanced. This is why basalt fibers can decrease the cracking probability. |
| Key words: road engineering asphalt mortar reinforced by basalt fiber semi circular bending test anti cracking performance critical cohesion critical fracture energy scanning electron microscope(SEM) |
