多孔海绵水泥混土路用性能研究.pdfVIP

Research on Pavement Performance of Porous Sponge Cement Concrete A Dissertation Submitted for the Degree of Master Candidate：Feng Yueyue Supervisor：Prof. Hu Liqun Zhang Zongtao Chang’an University, Xi’an, China 摘 要 随着社会经济的发展，生活环境日益受到人们的关注，特别是气候变暖，是一个全 球性的重大问题。城市规模迅速扩大，导致城市相对于郊区温度过高，从而形成“热岛 效应”，探索新型路面，改善这种局面亟不可待。 文中对多孔海绵水泥混凝土的原材料进行了选择，主要包括粗集料的粒径、海绵的 种类、颗粒尺寸及用量；针对多孔海绵水泥混凝土的结构特点对其拌合顺序及成型工艺 进行了详细介绍，特别强调了海绵的加入时间；对成型的多孔海绵水泥混凝土试件进行 抗压强度、劈裂强度及冻融试验，与普通多孔水泥混凝土相比，强度略微提高，观察试 件可知空隙中的海绵起了一定粘结作用；最后，针对多孔海绵水泥混凝土的蒸发及降温 性能进行了系统分析，结果表明多孔海绵水泥混凝土具有较好的降温效果。 本论文在普通多孔水泥混凝土和保水性路面材料的研究基础上，提出了一种新型环 保降温路面，基于多孔水泥混凝土的空隙率较大的特点，在混合料中加入吸水性材料海 绵，构成多孔海绵水泥混凝土其降温效果明显，若广泛应用于城市广场、小区和人行道 等轻型路面，则有效改善城市环境，缓解“城市热岛效应”。 关键词：多孔海绵水泥混凝土，热岛效应，海绵，降温性能 I Abstract With the development of social economy, the living environment has attracted increasing attention, especially climate warming, which is a global major issues. The temperature of cities is higher than it is in suburbs due to the rapid development of the cities, thus forming a heat island effect in the cities. Exploring a new pavement to improve the situation is badly needed. This paper first made a choice of materials of porous sponge cement concrete according to particle size of coarse aggregate and the type, particle size and usage of sponge. Second, it introduced the mixing order and molding technics in detail with particular emphasis on the time when to add sponge according to structure characteristics of porous sponge cement concrete. Then, it conducted the compressive strength and splitting strength test of compaction molding specimens of porous sponge cement concrete. Compared with ordinary porous cem