镁基建筑墙体防火保温材料体系及性能的研究

发布时间：2018-01-18 01:33

本文关键词：镁基建筑墙体防火保温材料体系及性能的研究　出处：《安徽建筑大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着城市化建设水平的不断提高,我国已逐渐成为一个建筑能耗大国。墙体保温技术是减少建筑能耗的有效途径,既符合国家节能减排的方针,又能改善生活环境。低品级菱镁矿一直很少被利用,随意堆放既浪费资源又污染环境。本文以低品级菱镁矿烧制成的轻烧氧化镁、工业副产品氯化镁为主要原料,制成了一种镁基墙体保温材料。活性氧化镁的含量是轻烧镁粉的一个重要性质,它决定轻烧镁粉与氯化镁的配合比。本文首先用水热合成法测定了一份轻烧镁粉样品中活性氧化镁的含量,测得值为39.12%,两组试验的误差仅为0.46%,该方法简单便捷。正常情况下在空气中久置后,活性氧化镁的含量会下降,而在一定温度下煅烧久置的轻烧镁粉能提高其中活性氧化镁的含量。本文在750℃温度下用马弗炉煅烧一份久置的活性MgO含量降低到28.06%的轻烧镁粉样品1.5h后,活性氧化镁的含量达到68.85%,比煅烧前提高了145.37%。本文随后用粉煤灰、磷酸、硫酸铝、有机硅防水剂以及活性MgO含量为34.91%的低品级轻烧氧化镁研制出一种耐水氯氧镁胶凝材料,并对镁质材料的强度、耐水性能进行了测试。通过分析粉晶XRD衍射图样和断面SEM微观结构对镁质材料的耐水机理进行了研究。研究结果表明改性过的镁质材料具有优良的耐水性能,其28d软化系数从0.76提高到了0.98。本文还以聚丙烯纤维、普通废弃陶瓷、工业氯化镁以及含39.12%活性氧化镁的低品级轻烧氧化镁制成了一种镁水泥基建筑墙体材料。采用正交试验确定了最佳配合比,并对聚丙烯纤维、废弃陶瓷复合增强剂对镁水泥干缩性能的影响进行了探讨。研究结果表明,纤维及陶瓷对镁水泥分别起到了增韧增强及骨架作用。其制品28d干缩率仅为0.03%。本文还通过用Origin软件对试验数据进行回归分析,以方程的形式量化了表观密度、强度和导热系数三者与聚苯乙烯颗粒加入量的关系。分析了镁水泥基EPS颗粒轻集料混凝土的破坏机理析,认为试块的强度随着聚苯乙烯加入量增加而降低的速度逐渐变得平缓是因为影响强度的主导因素由氯氧镁水泥硬化体的数量变成了水泥浆与EPS颗粒混合的均匀程度。本文还设计出一种新型双面翻转保温试模,使镁水泥石与EPS颗粒能更均匀混合并更紧密结合,提高了保温试块的安全性能。本文最后初步设计出镁基建筑墙体保温系统,并绘制出镁基EPS颗粒板薄抹灰系统的构造图。
[Abstract]:With the continuous improvement of the level of city construction, China has gradually become a building energy consumption country. Wall insulation technology is an effective way to reduce the energy consumption of the building, not only conforms to the national energy-saving emission reduction policy, and to improve the living environment. Low grade magnesite has been rarely used by dumping is not only a waste of resources and environmental pollution. In this paper low grade magnesite made of light burned Magnesium Oxide, industrial by-product magnesium chloride as the main raw material, a magnesium base wall insulation materials is made. The content of active Magnesium Oxide is one of the important properties of light burned magnesium, it decided to cooperate with light burned magnesium chloride and magnesium ratio. Firstly, hydrothermal synthesis method of a light Magnesium Oxide burning active determination of magnesium in the sample, the measured value is 39.12%, the error of the two experimental groups was only 0.46%, the method is simple and convenient. Under normal circumstances in the air for a long time, the activity of Magnesium Oxide The content will decline, but at a certain temperature calcining long set of light burned magnesium can improve the content of the activity of Magnesium Oxide. This paper used a muffle furnace calcination for a long time the activity of MgO content decreased to 28.06% of the light burned magnesium sample 1.5h at 750 DEG C temperature, the content of active Magnesium Oxide reached 68.85%, than calcination the improved 145.37%. then fly ash, phosphoric acid, aluminum sulfate, organosilicon waterproofing agent and active MgO content of 34.91% low grade light burning Magnesium Oxide developed a magnesium oxychloride cementitious material, and magnesia material strength, water resistance were tested. By analyzing the water resistant mechanism of powder XRD diffraction pattern section SEM and the microstructure of magnesia materials were studied. The results show that modified magnesia material has excellent water resistance, the softening coefficient of 28d increased from 0.76 to 0.98. based on polypropylene fiber, Ordinary ceramic waste, industrial magnesium chloride and low grade with 39.12% active Magnesium Oxide Magnesium Oxide a light burned magnesium cement base building wall material made by orthogonal test. The optimum mixture ratio, and the polypropylene fiber, waste ceramic composite reinforcing agent of magnesium cement dry shrinkage were discussed. The results show that the ceramic fiber and magnesium cement respectively to reinforced skeleton role. The products of 28d and dry shrinkage is only 0.03%. based on the regression analysis of test data using Origin software to quantify the density equation of apparent strength and thermal conductivity of three and the amount of polystyrene particles. The relationship between the analysis the failure mechanism of magnesium cement particles of EPS lightweight aggregate concrete, that the strength of test block with polystyrene addition decreasing speed becomes smoothly because of the impact strength The leading factor by the number of magnesium oxychloride cement hardened into a uniform degree of cement paste and EPS particles. This paper also designed a new type of double turn insulation test mode, the magnesium cement and EPS particles can be uniformly mixed and more closely, to improve the insulation block safety performance in this paper. Finally, the preliminary design of magnesium based building wall insulation system, and draw the structure diagram of magnesium based EPS particle board thin plastering system.

【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU551

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