| 摘要: |
| 利用室内加速磨耗仪模拟了隧道钢渣沥青路面的抗滑性能衰减过程，研究了钢渣沥青混合料（SSAM）在不同钢渣掺量、不同荷载和不同温度条件下的抗滑性能衰减规律，并且结合扫描电镜（SEM）及压汞（MIP）试验，分析了SSAM抗滑性能衰减过程及机理.结果表明：钢渣的掺入从衰减终值、损失率和衰减速率3个方面提高了沥青混合料的抗滑性能；SSAM抗滑性能随钢渣掺量的增加呈现先升后降趋势，在50%钢渣掺量处出现拐点；荷载对SSAM抗滑性能的影响主要表现在衰减过程的第2阶段至第5阶段，温度对SSAM抗滑性能的影响主要表现在第1阶段；钢渣集料表面纹理丰富，孔结构和孔级配更合理，从而改善了SSAM沥青膜的黏结性，提高了SSAM抗滑性能的稳定性. |
| 关键词: 道路工程 隧道路面 钢渣沥青混合料 抗滑性能 衰减规律 衰减机理 |
| DOI：103969/j.issn.1007 9629201902019 |
| 分类号: |
| 基金项目:陕西省自然科学基础研究计划项目（2017JQ5085）；中央高校基本科研业务费专项资金项目（310821165004） |
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| Skid Resistance Attenuation of Steel Slag Asphalt Mixtures on Tunnel Pavement |
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SHEN Aiqin1, LIU Bo1, GUO Yinchuan1, YU Peng2, YU Muyang1
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1.School of Highway, Changan University, Xian 710064, China;2.Northwest Branch, China Airport Construction Group Corporation, Xian 710064, China
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| Abstract: |
| The attenuation process of skid resistance of tunnel steel slag asphalt pavements was simulated by the indoor accelerating wear instrument. The skid resistance attenuation rule of steel slag asphalt mixtures (SSAM) with different contents of steel slag, different loads, and different temperatures was studied. The skid resistance attenuation progress and mechanism of SSAM was analyzed by scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP). The results show that the addition of steel slag improves the skid resistance of the asphalt mixture from final attenuation value, loss rate and decay rate. The skid resistance of SSAM shows a trend of first increasing and then decreasing with the addition of steel slag, and there is an inflection point at the 50% steel slag content. The effect of load against skid resistance is mainly reflected in the second to fifth stages of the attenuation process. The effect of temperature against skid resistance is mainly reflected in the first stage. The surface texture of steel slag aggregate is complex, and its hole structure and grading are more reasonable, which improve the adhesive property of the SSAM asphalt film and the stability of the SSAM skid resistance. |
| Key words: road engineering tunnel pavement steel slag asphalt mixture（SSAM） skid resistance attenuation law attenuation mechanism |
