發(fā)布時(shí)間：2018-03-24 02:31

  本文選題：纖維增強(qiáng)水泥基復(fù)合材料　切入點(diǎn)：蒸壓養(yǎng)護(hù)　出處：《武漢理工大學(xué)》2008年碩士論文

【摘要】： 從20世紀(jì)80年代初起,鑒于石棉中所含的微細(xì)纖維有害于人體,若干發(fā)達(dá)國家相繼限制或停止石棉水泥制品的生產(chǎn)與使用,從而推動了無石棉纖維增強(qiáng)水泥制品的研制與開發(fā)。我國也研制與開發(fā)了多種非石棉纖維增強(qiáng)水泥,但是難以滿足人們對纖維增強(qiáng)水泥基復(fù)合材料的性能愈來愈高的要求。混合纖維增強(qiáng)混凝土與高性能纖維增強(qiáng)混凝土是纖維增強(qiáng)水泥基復(fù)合材料有了重大發(fā)展的標(biāo)志。 用混合纖維可制得兼具高強(qiáng)度、高延性與高韌性的纖維增強(qiáng)水泥基復(fù)合材料。通過增大纖維體積率、調(diào)整水泥基體的組成并改變制作工藝等,可制得高性能纖維增強(qiáng)水泥基復(fù)合材料,不僅大幅度提高材料的強(qiáng)度、韌性與延性,還改進(jìn)了其他方面的性能。本文采用多種纖維混合方式,利用高壓成型,蒸壓養(yǎng)護(hù)的制作工藝,研究了不同的實(shí)驗(yàn)參數(shù)、制作工藝對制品的性能、結(jié)構(gòu)以及組分的影響,優(yōu)化了制作的工藝,利用SEM、XRD表征方法對所制得材料的結(jié)構(gòu)與性能進(jìn)行了表征。 本文先采用振動成型工藝進(jìn)行了蒸壓養(yǎng)護(hù)與標(biāo)準(zhǔn)養(yǎng)護(hù)的試件性能與組成的比較實(shí)驗(yàn),結(jié)果顯示,標(biāo)準(zhǔn)養(yǎng)護(hù)7d試件的性能僅與蒸壓養(yǎng)護(hù)4h的試件的性能相當(dāng),砂灰比為1.0、麻黃姜廢渣摻量為2.0%、聚丙烯摻量0.25%、蒸壓養(yǎng)護(hù)4h的試件性能最佳;接著采用模壓成型工藝研究了不同膠凝材料及不同的增強(qiáng)材料在不同的實(shí)驗(yàn)參數(shù)條件下的性能與結(jié)構(gòu),結(jié)果顯示,水泥標(biāo)號越高所制得的復(fù)合材料的性能越好,木纖維與云母比例為0.25時(shí)增強(qiáng)效果最好,以爐渣作為膠凝材料在爐渣與石英砂的比例為3.0,蒸壓養(yǎng)護(hù)為6h時(shí)效果最好;最后介紹了一種無機(jī)非金屬涂料的制備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.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2008
【分類號】：TU564

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