【作者】 王丽；

【导师】 魏连雨；

【作者基本信息】 河北工业大学 ， 结构工程， 2003， 硕士

【摘要】 随着我国公路建设事业的发展，虽然目前仍然处于建设的高峰期，但是一批早期修建的地方道路和高速公路已经相继进入了养护和改、扩建阶段。在这一时期将会产生大量的废旧沥青路面材料，而这些材料是可以再生利用的资源，如果废弃，不仅会造成浪费，同时也会污染环境。废旧沥青路面材料是路面废料的一种，其再生利用技术在发达国家已经相当成熟，并得到了广泛的应用，而我国在这方面尚处于起步阶段。本文主要是研究利用水泥为添加剂稳定废旧沥青路面材料修筑路面基层和底基层的可行性与技术问题。 利用水泥处治废旧沥青路面材料属于沥青路面冷再生的范畴，其再生机理是将加工破碎的废料(包括废旧的沥青混合料和部分灰土基层)重新利用，经过水泥进一步的稳定作用，形成与水泥稳定级配粒料类似的基层和底基层材料。 本文设计了一系列室内试验，分别对原材料和再生混合料的物理力学性能进行了研究。初步对再生混合料的无侧限抗压强度、抗压回弹模量和劈裂强度等主要力学指标进行了分析评定，总结了其强度性能与刚度性能随水泥剂量、旧路面与灰土比例和养生龄期的变化规律，并建立了各指标之间的相互联系；此外对再生混合料的水稳定性、抗冻性、干缩特性、温缩特性和疲劳特性也进行了试验分析；在上述研究的基础上还探讨了原材料性质对再生混合料性能的影响。本文所提出的再生混合料设计参数以及疲劳试验研究结果，可以供设计、生产和进一步研究工作参考。 文章最后介绍了沥青路面冷再生的设计和施工方法，结合实体工程综合评价了再生混合料的使用性能。研究结果表明，以水泥为添加剂的沥青路面冷再生技术是一种非常适宜的道路维修改造方式，应该在沥青路面大中修工程中，尤其是缺乏砂石材料的地区推广应用。更多还原

【Abstract】 Though the highway construction is at the rush period presently in our country, some local roads and freeways should be maintained and reconstructed in succession. As a result, a mass of old pavement materials will be produced. These materials should be recycled instead of being discarded for fear of environment pollution. The old asphalt mixture is also one of them. Its recycling technique has been applied extensively in some developed countries and is just come into use in our country. This paper primary investigates the feasibility and technique of cement stabilized recycled asphalt mixture using in base and subbase course.The old asphalt mixture being dealt with cement is a cold in-place recycling method. The mechanism is that the crushed asphalt mixture and lime soil are reused and is stabilized by cement additive. So the material can be applied in base and subbase course such as cement stabilized aggregate.The physical and mechanical properties of the raw materials and the recycled mixture are studied respectively in this paper by means of indoor experiments. The primary mechanical indexes of the recycled mixture are tested, including the unconfined compressive strength, the resilient modulus and the cleavage strength. The changing laws of these indexes are related to the cement content, the ratio of old asphalt mixture to lime soil and the aged-period. And the relationship of each index is established. Furthermore, the water-resisting property, the frost resisting property, the dry shrinkage property, temperature contraction property and fatigue property are investigated. On the basis of the above-mentioned research, the effect of the raw materials towards the recycled mixture is analyzed. The design parameters and the fatigue test result given in this paper can be available in design, engineering as well in further research.The designing and constructing technics are also developed in this paper and the engineering performance of the recycled mixture used in highway entity pavement is comprehensively evaluated. The research indicates that cold in-place recycling of the old asphalt mixture is a favorable method for highway maintenance and reconstruction and especially should be applied in the region where is scarce of aggregate.更多还原