生活垃圾焚烧炉渣作为道路基层材料的耐久性能评价

发布时间：2018-10-15 14:34

【摘要】：随着当今社会的快速发展,生活垃圾越来越多,而垃圾处理场地是有限的,因此生活垃圾的减量化处理成为当今人们关注的焦点。生活垃圾焚烧炉渣(简称MSWI)是生活垃圾焚烧处理后的主要产物之一,它含有部分具有胶凝活性的成分,将MSWI用于基层水泥土或渣土中可以达到强化材料强度和提高材料稳定性的作用。在以往的研究中讨论了MSWI作为路基材料的适用性、变形性质及对周边环境的影响等方面。但是对于MSWI用于道路基层材料的耐久性能,目前的研究很少,针对这一问题,本文进行了以下几个方面的工作。首先,通过物理试验、静力学试验得到了掺入MSWI的混合土的物理力学性质,进而分析了MSWI的掺入对混合土的物理力学性质的影响;然后,根据研究的目的进行了动三轴试验,主要包括动变形试验和疲劳破坏试验。研究了土在循环周期荷载作用的回弹模量MR、阻尼比λ的变化规律,从变形性质、能量耗散、疲劳寿命三个角度分析了掺入MSWI的混合土在循环周期荷载作用下的变化规律,同时与原料土和水泥土进行比较,分析土体的耐久性能;最后,在试验的基础上,利用损伤力学的方法建立了材料的损伤演化方程,并得到了材料的损伤本构模型,进而评价了掺入MSWI的混合土的耐久性能。
[Abstract]:With the rapid development of today's society, more and more domestic waste, and the waste disposal site is limited, so the reduction of domestic waste treatment has become the focus of attention. MSW incinerator slag (MSWI) is one of the main products of MSW incineration. The application of MSWI in cement soil or residue can enhance the strength of the material and improve the stability of the material. In previous studies, the applicability of MSWI as subgrade material, its deformation properties and its influence on the surrounding environment are discussed. However, there are few researches on the durability of MSWI used in road base course materials. In view of this problem, the following work is done in this paper. Firstly, the physical and mechanical properties of mixed soil mixed with MSWI were obtained by statics test, and then the influence of MSWI on the physical and mechanical properties of mixed soil was analyzed, and then the dynamic triaxial test was carried out according to the purpose of the study. It mainly includes dynamic deformation test and fatigue failure test. In this paper, the variation law of the modulus of resilience (MR,) damping ratio 位 of soil under cyclic load is studied, and the variation law of mixed soil mixed with MSWI under cyclic load is analyzed from three angles: deformation property, energy dissipation and fatigue life. At the same time, compared with raw soil and cement soil, the durability of soil is analyzed. Finally, the damage evolution equation of material is established by the method of damage mechanics, and the damage constitutive model of material is obtained. Furthermore, the durability of mixed soil mixed with MSWI was evaluated.
【学位授予单位】：苏州科技学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U414

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