环境友好型纤维增强外墙装饰板的研究

发布时间：2018-03-24 02:31

本文选题：纤维增强水泥基复合材料　切入点：蒸压养护　出处：《武汉理工大学》2008年硕士论文

【摘要】： 从20世纪80年代初起,鉴于石棉中所含的微细纤维有害于人体,若干发达国家相继限制或停止石棉水泥制品的生产与使用,从而推动了无石棉纤维增强水泥制品的研制与开发。我国也研制与开发了多种非石棉纤维增强水泥,但是难以满足人们对纤维增强水泥基复合材料的性能愈来愈高的要求。混合纤维增强混凝土与高性能纤维增强混凝土是纤维增强水泥基复合材料有了重大发展的标志。用混合纤维可制得兼具高强度、高延性与高韧性的纤维增强水泥基复合材料。通过增大纤维体积率、调整水泥基体的组成并改变制作工艺等,可制得高性能纤维增强水泥基复合材料,不仅大幅度提高材料的强度、韧性与延性,还改进了其他方面的性能。本文采用多种纤维混合方式,利用高压成型,蒸压养护的制作工艺,研究了不同的实验参数、制作工艺对制品的性能、结构以及组分的影响,优化了制作的工艺,利用SEM、XRD表征方法对所制得材料的结构与性能进行了表征。本文先采用振动成型工艺进行了蒸压养护与标准养护的试件性能与组成的比较实验,结果显示,标准养护7d试件的性能仅与蒸压养护4h的试件的性能相当,砂灰比为1.0、麻黄姜废渣掺量为2.0%、聚丙烯掺量0.25%、蒸压养护4h的试件性能最佳;接着采用模压成型工艺研究了不同胶凝材料及不同的增强材料在不同的实验参数条件下的性能与结构,结果显示,水泥标号越高所制得的复合材料的性能越好,木纤维与云母比例为0.25时增强效果最好,以炉渣作为胶凝材料在炉渣与石英砂的比例为3.0,蒸压养护为6h时效果最好;最后介绍了一种无机非金属涂料的制备及其在水泥基材上的涂覆效果。
[Abstract]:Since the early 1980s, in view of the fact that the fine fibers contained in asbestos are harmful to the human body, a number of developed countries have successively restricted or stopped the production and use of asbestos and cement products. In order to promote the research and development of non-asbestos fiber reinforced cement products, China has also developed and developed a variety of non-asbestos fiber reinforced cement, However, it is difficult to meet the increasing demand for the performance of fiber reinforced cement matrix composites. Mixed fiber reinforced concrete and high performance fiber reinforced concrete are the important signs of the development of fiber reinforced cement matrix composites. Fiber reinforced cement matrix composites with high strength, high ductility and high toughness can be prepared by using mixed fibers. By increasing the fiber volume ratio, adjusting the composition of cement matrix and changing the manufacturing process, etc. The strength, toughness and ductility of high performance fiber reinforced cement matrix composites can be greatly improved, as well as the properties of other aspects. In this paper, a variety of fiber mixing methods and high pressure molding methods are used to improve the strength, ductility and ductility of the composites. The preparation process of autoclaved curing was studied. The effects of different experimental parameters on the properties, structure and composition of the products were studied. The fabrication process was optimized. The structure and properties of the prepared materials were characterized by means of SEM XRD. In this paper, the performance and composition of autoclaved curing specimen and standard curing specimen are compared by vibration molding technology. The results show that the performance of the standard curing specimen for 7 days is only equivalent to that of the specimen cured with autoclaved pressure for 4 hours. The best properties were obtained when the ratio of sand to cement was 1.0, the content of waste residue of ephedra ginger was 2.0, the content of polypropylene was 0.25, and the curing time of autoclaved was 4 hours. Then, the properties and structures of different cementing materials and different reinforcing materials under different experimental parameters were studied by using the molding technology. The results showed that the higher the cement label, the better the properties of the composites. When the ratio of wood fiber to mica is 0.25, the enhancement effect is the best. When the ratio of slag to quartz sand is 3.0 and the autoclaved curing time is 6 hours, the slag is used as the cementitious material. Finally, the preparation of an inorganic non-metallic coating and its coating effect on cement substrate are introduced.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TU564

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