【作者】 刘国华；

【导师】 单丽岩；

【作者基本信息】 哈尔滨工业大学 ， 交通运输（专业学位）， 2022， 硕士

【摘要】 道路积雪结冰不仅显著降低路面的抗滑性能,还极易对道路结构造成严重破坏。自融雪沥青路面实现了道路主动除雪融冰的功能,有效改善了冬季道路的行车条件,但难以满足大量在役路面的除雪融冰需求。低冰点微表处技术通过将低冰点填料与道路养护技术相结合不仅改善了原路面性能,还发挥了良好的除雪融冰效果。但其在应用中易出现成型速度慢、耐磨耗性能不足且难以调配的问题,限制了该技术的推广应用。基于此,本论文对低冰点微表处组成材料进行研究,探究其对低冰点微表处性能的影响规律,并分析低冰点填料与组成材料的相互作用机制,最终确定适用于低冰点微表处的组成材料性能控制指标,并基于研究成果进行混合料配合比设计,验证低冰点微表处应用性能。首先,对部分原材料性能进行了分析,并基于试验探究的方法确定了改性乳化沥青蒸发残留物获取方法和湿轮磨耗试验方法,为后续研究奠定了基础。然后,基于SBR改性乳化沥青的系列性能试验,确定了采用固含量和化学成分两项指标共同作为SBR胶乳的性能控制指标。基于复合改性乳化沥青性能研究,初步确定了组成材料的影响效应。通过微观机理研究和混合料性能试验,确定了环氧树脂和乳化剂的类型指标以及环氧树脂和外加水量的掺量范围要求。通过探究低冰点填料置换掺量对复合改性乳化沥青胶浆各项性能的影响规律,确定了低冰点填料掺量的推荐范围。分析了矿料砂当量和级配对低冰点微表处混合料各项性能的影响规律,发现矿料砂当量越高,混合料的早期强度也越高,建议矿料砂当量值不低于70%。矿料级配对混合料的成型速度、抗磨耗性能以及有效成分释放均存在影响,混合料中0.075mm以下粒径矿料含量越高,其早期强度和抗磨耗性能也越高,有效成分释放也更持久,建议混合料中0.075mm以下粒径矿料含量不宜低于9%,且矿料级配不宜低于中值级配。最后,基于前期研究成果进行低冰点微表处的配合比设计和性能评价,结果表明混合料具有良好的施工性能和路用性能,同时也兼具优良的除雪融冰效果。本论文研究成果解决了低冰点微表处现存的路用性能不足、难以调配的问题,可有效指导低冰点微表处的设计与应用,具有重要的理论和应用价值。更多还原

【Abstract】 Snow and ice on the road not only significantly reduce the skid resistance of the pavement,but also easily cause serious damage to the road structure.Anti-icing asphalt pavement realizes the function of removing snow and ice actively,and effectively improves the driving conditions of roads in winter,but it is difficult to meet the needs of a large number of existing pavements.anti-icing micro-surfacing technology not only improves the performance of the original pavement,but also plays a good role in snow removal and ice melting by combining anti-icing filler with road maintenance technology.However,the problems of slow forming speed,weak wear resistance and difficult to mix in application limit the popularization and application of this technology.Based on this,this paper studies the composition materials of anti-icing micro-surfacing,explores its influence on the performance of anti-icing micro-surfacing,analyzes the interaction mechanism between anti-icing fillers and composition materials,and finally determines the performance control indicators of composition materials applicable to anti-icing micro-surfacing.Based on the research results,the mixture proportion design is carried out to verify the application performance of anti-icing micro-surfacing.Firstly,the properties of some raw materials were analyzed,and the methods of obtaining evaporation residue of modified emulsified asphalt and wet wheel wear test were determined based on the test method,which laid a foundation for the follow-up research.Secondly,based on a series of performance tests of SBR modified emulsified asphalt,the solid content and chemical composition were determined as the performance control indicators of SBR latex.Based on the study of the properties of composite modified emulsified asphalt,the influence of the composition materials was preliminarily determined.Through micro mechanism study and mixture performance test,the type index of epoxy resin and emulsifier and the mixing range requirements of epoxy resin and added water were determined.The recommended range of anti-icing filler content was determined by exploring the influence of antiicing filler replacement content on the properties of composite modified emulsified asphalt mortar.It is found that the higher the mineral sand equivalent is,the higher the early strength of the mixture is.It is suggested that the mineral sand equivalent value should not be less than 70%.The gradation of mineral aggregate has an impact on the forming speed,abrasion resistance and effective component release of the mixture.The higher the content of mineral aggregate with a particle size less than0.075 mm in the mixture,the higher its early strength and abrasion resistance,and the longer the effective component release.It is recommended that the content of mineral aggregate with a particle size less than 0.075 mm in the mixture should not be less than 9%,and the mineral aggregate gradation should not be lower than the median gradation.Finally,based on the previous research results,the mix proportion design and performance evaluation of anti-icing micro-surfacing are carried out.The results show that the mixture has good construction performance and road performance,as well as excellent snow and ice removal effect.The research results of this paper have solved the existing problems of insufficient road performance and difficult deployment of anti-icing micro-surfacing,and can effectively guide the design and application of anti-icing micro-surfacing,which has important theoretical and application value.更多还原