高弹高粘沥青超薄磨耗层在道路改造工程中的应用

发布时间：2018-06-16 04:30

本文选题：超薄磨耗层 + 路面养护　；参考：《重庆交通大学》2014年硕士论文

【摘要】：超薄磨耗层是一种新型的路面养护技术，虽然设计厚度比较薄（15mm～25mm），但是在解决轻微裂缝、路面松散、表面贫油、车辙(小于15mm)、老化及路面渗水等方面却表现出显著的效果，因此在旧沥青路面功能性恢复中经常使用。除此之外，将超薄磨耗层应用在新建公路表面功能层上，不但在一定程度上保证了路面的行车质量,而且也延长了道路使用寿命，所以也渐渐得到社会的认可。本文选取了可以用在超薄层中的三种级配即间断级配的SMA、开级配的OGFC、半开级配的NovaChip TypeB。在级配改变的同时，，沥青胶结料也发生相应的改变。通过室内试验在对组成材料的各项物理性能指标、配合比的设计、以及路用性能的研究的基础上，经过分析可以知道，当改变沥青胶结料种类时，半开级配NovaChip TypeB整体稳定性比较好，抵抗外界破坏强度比较高。同时针对超薄层对沥青的要求，配置了高弹高粘沥青。虽然在同种级配下，该沥青的应用使最佳油量大大提高，然而它与矿料间的强烈粘附作用，却使路面在抵抗水损害方面大大提高。最后综合考虑，在本文对超薄磨耗层技术要求下，将高弹高粘沥青与半开级配NovaChip TypeB相结合，应用在了福州市五一路路面改造工程中。该施工中采用的是同步施工技术，施工过程中严格把关，最后在路面验收检测中，各指标均能满足磨耗层规范的技术要求。通过此次课题研究，综合经济效益，以及社会效益，高弹高粘沥青超薄磨耗层在城市道路改造中可以进一步的推广和应用。并希望以此能为我国超薄磨耗层的进一步发展带来帮助和借鉴意义。
[Abstract]:The ultra-thin wear layer is a new type of pavement maintenance technology. Although it is designed to be 15 mm to 25 mm in thickness, it has a remarkable effect in solving slight cracks, loose pavement, poor surface oil, rutting (less than 15mm), aging and seepage of pavement, etc. Therefore, it is often used in the functional recovery of old asphalt pavement. In addition, the application of ultra-thin wear layer on the surface functional layer of new highway not only ensures the driving quality of the road to a certain extent, but also prolongs the service life of the road, so it is gradually recognized by the society. In this paper, we select three kinds of gradation (SMA, OGFC, NovaChip TypeB), which can be used in ultra-thin layer, which are discontinuous gradation, OGFC, and NovaChip TypeB, which can be used in ultrathin layer. At the same time of grading change, asphalt binder also has corresponding changes. On the basis of the research on the physical performance index, the mix ratio design and the road performance of the composition material, through the laboratory test, we can know that when changing the kind of asphalt binder, NovaChip TypeB with semi-open gradation has good overall stability and high resistance to external damage. At the same time, high elastic and high viscosity asphalt is arranged according to the requirement of super thin layer. Although the application of the asphalt in the same gradation has greatly increased the optimum oil content, the strong adhesion between the asphalt and the mineral aggregate has greatly increased the resistance of the pavement to water damage. Finally, according to the technical requirements of ultra-thin wear layer, the paper combines high elastic high viscosity asphalt with semi-open graded NovaChip type B, and applies it to the Wuyi pavement reconstruction project in Fuzhou. In this construction, the synchronous construction technology is adopted, the construction process is strictly checked, and finally, in the pavement acceptance inspection, each index can meet the technical requirements of the wear layer specification. Through this research, comprehensive economic benefit and social benefit, the ultra-thin wear layer of high elasticity and high viscosity asphalt can be further popularized and applied in urban road reconstruction. It is hoped that this will be helpful and useful for the further development of ultra-thin wear layer in China.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414;U418.8

【参考文献】