页岩陶粒生态混凝土试验研究

发布时间：2018-01-05 15:08

本文关键词：页岩陶粒生态混凝土试验研究　出处：《河南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：混凝土作为最大宗人造建筑材料,给人类带来了文明,但同时也破坏了自然生态环境。而生态混凝土则凭借其特殊结构与表面特性,具有净化水体、净化空气和景观效应等许多优点,可有效地减少混凝土给环境所带来的负面影响,以适应混凝土材料可持续发展的需求。因此,对生态混凝土的研究具有重要的现实意义。本文主要做了以下一些研究工作:(1)本文从轻质高强和低碱度出发,以页岩陶粒为骨料,以水泥、粉煤灰、硅灰、矿渣粉为胶凝材料,配制出一种透水性良好、强度较高的页岩陶粒生态混凝土;并分析了页岩陶粒生态混凝土在多种因素影响下,其力学性能、透水系数、pH值等植生性能的变化情况;(2)针对页岩陶粒生态混凝土在屋顶绿化工程中的应用,本文开发了一种新型的屋顶绿化植被模型(屋顶绿化一体化植被模型)。其中,对于温暖的地区,该系统包含了7个结构层,即植被层、生长介质层、架空(蓄水)层、透水混凝土垫层、防水层、屋顶结构层和排水孔;而对于寒冷地区,则应该在屋顶结构层和防水层之间增加加一个保温层;(3)为了探讨屋顶绿化一体化植被模型的工程应用适应性,本文进行了为期3年的几种室外植生试验,即通过多孔生态混凝土构件(在盲孔中填满营养土)作为生长介质层,利用水箱模拟一体化植被模型中的架空(蓄水)层。结果表明,植物成活率很高,并在早期阶段植物生根很快,能够适应当时的碱性环境;(4)根据对峻工近两年的车库屋顶绿化工程试验观察,发现植物生长比较茂盛,从而实现了对住宅小区的绿化功能。
[Abstract]:As the largest man-made building material, concrete has brought civilization to human beings, but also destroyed the natural ecological environment. However, ecological concrete has purified water body by virtue of its special structure and surface characteristics. Many advantages, such as purifying air and landscape effects, can effectively reduce the negative impact of concrete on the environment, in order to meet the needs of the sustainable development of concrete materials. The study of ecological concrete has important practical significance. This paper mainly do the following research work: 1) from the light weight, high strength and low alkalinity, shale ceramsite as aggregate, cement, fly ash. Silica fume and slag powder were used as cementing materials to prepare a kind of shale ceramsite ecological concrete with good permeability and high strength. Under the influence of many factors, the mechanical properties, permeability coefficient and pH value of shale ceramsite ecological concrete were analyzed. In view of the application of shale ceramsite ecological concrete in roof greening project, a new roof greening vegetation model (roof greening integrated vegetation model) is developed in this paper. The system consists of seven structural layers, namely vegetation layer, growth medium layer, overhead layer, permeable concrete cushion, waterproof layer, roof structure layer and drainage hole. For cold areas, an additional insulation layer should be added between the roof structure layer and the waterproof layer; 3) in order to study the engineering application adaptability of the integrated vegetation model of roof greening, several outdoor planting experiments were carried out in this paper. That is to say, the porous ecological concrete member (fill the nutrient soil in the blind hole) as the growth medium layer, using the water tank to simulate the aerial (water storage) layer in the integrated vegetation model. The results show that the survival rate of plants is very high. At the early stage, the plants took root quickly and could adapt to the alkaline environment at that time. 4) based on the observation of the garage roof greening engineering in recent two years, it is found that the plant growth is relatively lush, thus realizing the greening function of the residential district.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU528

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