相变材料及其在沥青路面降温应用中的研究

发布时间：2018-01-06 13:36

本文关键词：相变材料及其在沥青路面降温应用中的研究　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：沥青路面是我国城市道路及高速公路最常用的路用面层材料，在广泛应用的同时，高温下产生的各种损害也多方面制约着其发展。本论文旨在研究通过特殊方法将相变材料加入到沥青混合料中进行沥青路面的调温性能效果及可行性分析。本研究先从相变材料本身的相变潜热特性出发，从相变材料的相变潜热值、稳定性等多方面考虑，选用相对各项性能都符合条件的一种或几种相变材料。再通过不同的负载封装办法，制备成复合相变材料，确保对沥青混合料其他力学性能影响达到最小。通过对试件模拟光照进行对比，以掺加复合相变材料的沥青混合料的升温、降温试验为依据，分析认为复合相变材料对沥青混合料高温环境下有一定的温度调控作用。通过对掺入复合相变材料的沥青混合料的高温稳定性、水稳定性实验表明，，加入复合相变材料的沥青混合料马歇尔稳定度及动稳定度满足要求；其中肉豆蔻酸在力学性能与调温效果两方面下综合考虑为最佳相变材料；本文首次提出体积热熔法评价掺入相变材料的沥青混合料性能。综上表明，向沥青面层混合料中加入复合相变材料能对路面温度升高有效的调控作用；在经过负载封装方法处理后，满足标准沥青混合料的路用性能。
[Abstract]:Asphalt pavement is the most commonly used pavement material for urban roads and highways in China, which is widely used at the same time. The development of asphalt pavement is restricted by various kinds of damage under high temperature. This paper aims to study the effect and feasibility of asphalt pavement temperature regulation by adding phase change material to asphalt mixture by special method. This study starts from the phase change latent heat characteristics of the phase change material itself and considers the phase change latent heat value and stability of the phase change material. Choose one or several kinds of phase change materials which meet the conditions of relative properties, and then prepare composite phase change materials by different loading and encapsulation methods. To ensure that the impact on other mechanical properties of asphalt mixture to the minimum. Through the contrast of the simulated light of the test piece, based on the temperature rise and cooling test of the asphalt mixture mixed with the composite phase change material. It is concluded that the composite phase change material can regulate the temperature of asphalt mixture at high temperature. Through the high temperature stability of asphalt mixture mixed with composite phase change material, the water stability experiment shows that the Marshall stability and dynamic stability of asphalt mixture with composite phase change material can meet the requirements. Myristic acid was considered as the best phase change material under the two aspects of mechanical properties and temperature-regulating effect. In this paper, the volumetric hot melt method is proposed to evaluate the performance of asphalt mixture mixed with phase change material for the first time. The results show that adding the composite phase change material to the asphalt mixture can control the pavement temperature effectively and meet the road performance of the standard asphalt mixture after the load encapsulation method.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U414;U416.217

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