高速公路沥青路面早期水损害防治措施研究

【作者】 李剑；

【导师】 郝培文；

【作者基本信息】 长安大学 ， 道路与铁道工程， 2003， 硕士

【摘要】 高速公路沥青路面早期水损害已成为我国高速公路沥青路面最主要的病害之一，如何进行有效地防治是目前公路工程师比较关心的问题。本文在调查的基础上，通过分析沥青路面早期水损害产生的机理，从沥青路面表面层级配、压实性能和以消石灰作为抗剥落剂的抗剥落性能三方面对沥青路面早期水损害进行了大量的室内试验研究。研究结果表明，采用体积法设计的级配不仅具有较好的水稳定性而且其它路用性能均满足高速公路面层的要求；综合考虑压实性能及路用性能，提出了沥青路面表面层结构层厚度与混合料最大粒径的合理比例为2.5；掺有液体胺类抗剥落剂的沥青混合料经长期老化后其抗水损害能力衰减严重，而掺加消石灰的混合料能显著提高其抗水损害能力，且长期性能较好，是一种优良的抗剥落剂。更多还原

【Abstract】 The early moisture damage of asphalt pavements has been one of the uppermost distresses in expressway, how to prevent it efficiently has been a problem that highway engineers pay much attention to. The paper analyzed the mechanism of the early moisture damage on the basis of survey, had carried out a series of laboratory tests to study the prevention measures from three aspects, that were gradation of the surface course and compaction capacity and the anti-stripping performance of hydrated lime qua anti-stripping agent. The results showed that the gradation, which designed by volumetric methods, has perfect water-stability and other pavement performance also can meet the demands of expressway. By integrating compaction capacity and pavement performances, the optimal ratio of the structural layer thickness to the maximum particle-size is 2.5. The water resistance of the mixture added amine type anti-stripping agent attenuates severely after long-term aging, but the mixture added hydrated lime not only can improve obviously the capacity of water resistance, but also has perfect long-term pavement performance. It is a superior anti-stripping agent.更多还原