小粒径排水型抗滑超薄磨耗层施工技术研究

小粒径超薄沥青罩面作为一种新型路面结构,具有厚度薄(1.5~2.5 cm)、空隙率大(18%~25%)的结构特点,其碾压温度与碾压功大小与以往沥青路面存在差异,但在现有规范中并未给出推荐的施工方法。因此首先通过室内击实试验分析击实温度和击实次数对马歇尔试件飞散性能的影响,之后基于能量等效原理建立室内击实功与现场压实功的对应关系,以此为指导确定现场碾压遍数与组合方式,最后摊铺试验段对上述建立的关系模型进行验证,为罩面层的科学施工提供理论指导。

Study on Construction Technology of Small Particle Size Ultra-thin Overlay with Drainage and Skid resistance

As a new type of pavement structure, the ultra-thin asphalt overlay with small particle size has the characteristics of thin thickness (1.5~2.5cm) and large void ratio (18~25%). Its rolling temperature and rolling work capacity are different from those of previous asphalt pavements, but the recommended construction methods are not given in the existing specifications. Therefore, this paper first analyzes the impact of compaction temperature and number of compaction on the scattering performance of Marshall specimens through indoor compaction test, and then establishes the corresponding relationship between indoor compaction work and on-site compaction work based on the energy equivalent principle. This is used as a guide to determine the number of rolling passes and combinations. Finally, the above established relationship model is verified in the paving test section to provide theoretical guidance for the scientific construction of the overcoat.