高性能半柔性路面材料的研制

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摘要随着经济的高速发展，公路建设事业也迅猛发展，公路网日益密集，尤其是高等级公路建设量大大增加，交通量和轴载也迅速增长。这样就对路面材料的强度和稳定性提出了更高的要求。传统的典型路面材料沥青混凝土材料和水泥混凝土材料已经逐渐不能满足日益增高的路面材料性能需求，各自的缺点也越发明显。高性能半柔性路面材料应运而生。作为一种新型的路面材料它既具备传统的两种路面材料的有点又很好的避免了两者的缺点，可以很好的满足目前公路压力对路面材料的要求。56086

半柔性路面是一种在开级配的大孔隙沥青混合料中填充水泥胶浆而形成的一种新型复合路面结构。它兼具有沥青路面与水泥砼路面的优点，有高于水泥混凝土的柔性和沥青混凝土的刚度。其材料结构属于骨架—密实结构，沥青混合料作为其基体则属于骨架—空隙结构。半柔性路面在日本、美国及欧洲部分国家已得到广泛应用，而我国由于技术条件限制对半柔性路面的研究尚在摸索阶段。由于在半柔性路面的研究中存在水泥胶浆渗透性与收缩特性不能兼顾、大空隙基体沥青混合料沥青界面与水泥胶浆相容性不佳、路面易开裂等诸多缺陷未被攻克，因而其并未得到大面积推广使用。

本文从半柔性路面材料的结构组成出发，对半柔性复合路面材料进行研究。在问题的根本上来了解问题。了解其组成材料之间的相互作用、强度形成机理及其影响因素，为半柔性路面材料组分的优化设计提供理论依据。半柔性路面材料主体有两部分：水泥胶浆和基体沥青混合料。故其性能也主要受两者性能的影响。因此，本文对水泥胶浆和基体沥青混合料各个方面性能进行了理论探讨，提出了系统的水泥胶浆和基体沥青混合料设计方法及一种水泥胶浆和基体沥青混合料设计配比来配制满足力学性能及路用性能要求的半柔性路面材料。

本文在系统研究半柔性路面材料的组成、结构与性能之间关系的基础上，了解了半柔性路面的设计方法、半柔性路面高温稳定性、低温抗裂性、水稳性能等路用性能。为半柔性复合路面设计技术的推广应用打下基础。

毕业论文关键词：半柔性路面材料水泥胶浆沥青混合料配合比性能

ABSTRACT With the economic develop rapidly, the rapid development of highway construction. Road network increasingly dense, covering the whole country. Especially the large increase in highway construction, traffic volume and axle load is also growing rapidly. So the strength and stability of the pavement materials have higher requirements than before. Traditional asphalt concrete and cement concrete pavement materials have not been able to meet the growing demand for increasing performance of pavement materials, their shortcomings are more obvious. High-performance semi-flexible pavement materials emerged. As a new type of pavement materials,it has the advantages of two traditional pavement materials and avoid the disadvantages of them, which can well meet the requirements of pavement material under the current pressure.

Semi-flexible pavement is a kind of a new composite pavement structure, which filled the cement mortar into the open-graded large pores asphalt mixture. It has the advantages of asphalt and cement concrete pavement,with the better flexible than cement concrete and the higher rigidity than asphalt concrete. Its material structure belongs to the skeleton - dense structure, asphalt as its base belongs to the skeleton - gap structure. Semi-flexible pavement has been widely used in Japan, United States and some European countries. Due to the restrictions of technology, the research of the semi-flexible pavement is still in the exploratory stage in China. As existing the unsolved problems of cement mortar permeability and shrinkage characteristics can not be taken into account, the compatibility of large gap matrix asphalt bitumen interface and cement mortar,is poor, and roads easy to crack in the study of semi-flexible pavement, it does not promote to use in a large area.