石灰岩与玄武岩混合集料沥青路面表层抗滑性能研究

发布时间：2018-08-02 10:39

【摘要】：沥青路面抗滑性能是关系到道路行车安全的重要指标,良好的抗滑性能是保证行车安全的有效手段。但随着道路建设里程的增加,优质的抗滑表层材料逐渐减少。若能做到就地取材,不仅可以节约成本,还能起到促进当地经济发展的作用。本文拟利用云南境内丰富的石灰岩资源,以石灰岩与玄武岩混合集料制备的沥青混合料为研究对象,分析在交通荷载反复作用下其抗滑性能的衰减规律。首先,通过总结国内外抗滑路面相关研究现状,分析沥青路面抗滑性能形成机理、评价指标以及影响因素。以石灰岩与玄武岩集料为主要对象,进行原材料各项性能指标试验。分析石灰岩与玄武岩集料混合掺配的意义,设计出石灰岩与玄武岩混合集料沥青混合料的掺配方案,并确定室内模拟试验方法。其次,在对比分析国内外室内磨耗抗滑试验仪优缺点的基础上,课题组研发了加速加载磨光试验仪。借助此仪器进行不同掺配方案、不同粗细级配的AC-13型沥青混合料室内抗滑性能模拟试验,每间隔一定时间测量试件构造深度(MTD)和摆值(BPN),以评价掺配方案的沥青混合料抗滑性能。试验结果表明:不同分组的试件抗滑指标衰变规律一致,均表现为摆值在试验初期下降幅度大,后期相对缓慢并趋于稳定;混合料级配越粗,越有利于提高沥青路面抗滑性能;掺配集料的沥青混合料抗滑性能优于石灰岩混合料,劣于玄武岩混合料,可以通过集料掺配的方式提高石灰岩沥青混合料的抗滑性能;掺配方案中玄武岩含量越高,混合料的抗滑性能越好。最后,利用PIARC模型对国际摩阻指数IFI中的参数进行计算,通过构造深度和摆值来确定国际摩阻指数IFI(F60,Sp),其应用能够很好地呈现沥青路面抗滑性能变化过程及趋势,有利于公路管理部门进行养护决策,也便于国际间进行沥青路面抗滑技术交流。
[Abstract]:The anti-skid performance of asphalt pavement is an important index of road driving safety, and good anti-skid performance is an effective means to ensure traffic safety. But with the increase of road construction mileage, high-quality anti-skid surface materials are gradually reduced. If we can make use of local materials, we can not only save cost, but also promote the development of local economy. In this paper, based on the abundant limestone resources in Yunnan Province, and taking the asphalt mixture prepared by the mixed aggregate of limestone and basalt as the research object, the attenuation law of its anti-slip performance under the repeated action of traffic load is analyzed. Firstly, through summarizing the research status of anti-skid pavement at home and abroad, the formation mechanism, evaluation index and influencing factors of anti-skid performance of asphalt pavement are analyzed. Taking limestone and basalt aggregates as main objects, the performance indexes of raw materials were tested. The significance of mixed mixing of limestone and basalt aggregate is analyzed, the mixing scheme of limestone and basalt aggregate asphalt mixture is designed, and the indoor simulation test method is determined. Secondly, on the basis of comparing and analyzing the advantages and disadvantages of the domestic and foreign indoor wear and tear tester, the research group developed the accelerated loading polishing tester. With the help of this instrument, the indoor anti-skid performance of AC-13 asphalt mixture with different mixing schemes and different coarse and fine gradation was simulated. The structural depth (MTD) and the pendulum value (BPN), were measured at certain intervals to evaluate the anti-slip performance of asphalt mixture mixed with different blending schemes. The test results show that the decay law of the anti-skid index of different groups of specimens is the same, which shows that the pendulum value decreases greatly at the initial stage of the test, and the latter stage is relatively slow and tends to be stable, the coarser the mixture gradation is, the more conducive to improving the anti-skid performance of asphalt pavement; The skid resistance of asphalt mixture mixed with aggregate is better than that of limestone mixture, which is inferior to that of basalt mixture. The better the skid resistance of the mixture. Finally, the parameters of international friction index (IFI) are calculated by using PIARC model, and the international friction index IFI (F60 Sp) is determined by constructing depth and pendulum value. The application of IFI can well present the changing process and trend of asphalt pavement skid resistance. It is propitious for highway management department to make maintenance decision and for international exchange of asphalt pavement anti-skid technology.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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