热沥青混合料碾压过程的离析现象

Rolling Segregation of Hot Asphalt Mixture

针对混合料不均匀导致路面早期损坏的问题,采用综合分析的方法,从碾压施工角度重点分析了热沥青混合料碾压过程的不均匀现象,通过分析可能造成沥青混合料碾压过程离析的多种原因,提出了碾压离析的概念。认为除热沥青混合料生产、摊铺和碾压可能造成碾压离析外,路面结构设计、施工工艺和压路机的设计与制造不合理也是造成碾压离析的3个重要原因。研究结果表明:造成混合料不均匀的原因很多,应该综合考虑混合料生产、摊铺和碾压,路面结构和施工工艺,以及压路机的设计等因素,才能进一步提高路面的质量。

The damage of road surface in early days is mainly caused by mixture＇s non-homogeneity, the non-homogeneity is formed in the process of rolling hot asphalt mixture. The concept of rolling segregation is presented to reveal the forming process of non-homogeneity in rolling hot asphalt mixture. It is pointed out that there are many factors influemeing the rolling segregation, such as the technique of mixture＇s production, the paving method of mixture, and so on. But the main the factors are the design of pavement structure and the manufacture technique of roller. It is very important to comprehensively taking those factors into consideration to promote the pavement＇s quality. 8 figs, 9 refs.