纳米粒子和PVA纤维增强水泥基复合材料耐久性能研究

发布时间：2018-03-13 11:06

本文选题：水泥基复合材料　切入点：PVA纤维　出处：《郑州大学》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,由于PVA纤维水泥基复合材料有较高的延性及韧性,并具有多缝开裂和应变硬化的特性,因而受到了国内外众多学者的广泛关注。纳米材料作为一种新材料,在众多领域中表现出广阔的应用前景。随着纳米材料研究的进一步深入以及制造成本的逐渐降低,纳米材料将逐步应用到实际工程中。然而,在目前的研究资料中,尚未发现有关纳米粒子PVA纤维水泥基复合材料耐久性能的研究成果。本文通过大量试验研究了纳米粒子掺量和种类以及PVA纤维掺量对水泥基复合材料耐久性能的影响。主要研究内容:(1)研究了纳米粒子PVA纤维水泥基复合材料的配制方法,确定了十五组试验配合比。通过坍落扩展度试验,得出了PVA纤维掺量、纳米粒子掺量及种类对水泥基复合材料工作性能影响的规律。(2)以28d为试验龄期,通过尺寸为100mm×100mm×400mm小梁试件的抗冻融试验,得出了PVA纤维掺量、纳米粒子掺量及种类等对水泥基复合材料抗冻融性能影响的规律。(3)以28d为试验龄期,通过尺寸为100mm×100mm×100mm立方体试件的抗碳化试验,得出了PVA纤维掺量、纳米粒子掺量及种类等对水泥基复合材料抗碳化性能影响的规律。(4)以28d为试验龄期,通过尺寸为上底175mm,下底185mm,高150mm的圆台试件的抗渗试验,得出了PVA纤维掺量、纳米粒子掺量及种类等对水泥基复合材料抗渗性能影响的规律。(5)以1d为试验龄期,通过尺寸为900mm×600mm×20mm平板的抗裂试验,采用《水泥砂浆抗裂性能试验方法》中抗裂性能的评价方法对试验结果分析,得出了PVA纤维掺量、纳米粒子掺量及种类等对水泥基复合材料抗裂性能影响的规律。
[Abstract]:In recent years, due to the high ductility and toughness of PVA fiber cement matrix composites, as well as the characteristics of multi-joint cracking and strain hardening, many scholars at home and abroad have paid close attention to nanomaterials as a new material. With the further development of nanomaterials research and the decrease of manufacturing cost, nanomaterials will be gradually applied to practical engineering. However, in the current research data, No research results have been found on the durability of nano-particle PVA fiber cement matrix composites. In this paper, the effects of the content and category of nano-particles and PVA fiber on the durability of cement matrix composites have been studied by a large number of experiments. The main research content is: 1) the preparation method of nano-particle PVA fiber cement matrix composite was studied. The mixing ratio of 15 groups of tests was determined. Through the collapse expansion test, the influence of PVA fiber content, nano-particle content and type on the working properties of cement matrix composites was obtained. The test age was 28 days. Based on the freezing and thawing test of 100mm 脳 100mm 脳 400mm trabeculae, the influence of the content of PVA fiber, the content and type of nano-particles on the freeze-thaw resistance of cement matrix composites was obtained. Based on the carbonization test of 100mm 脳 100mm 脳 100mm cubic specimens, the effect of PVA fiber content, nano-particle content and type on the carbonation resistance of cement matrix composites was obtained. The experimental age was 28 days. Based on the impermeability test of the specimens with a top bottom of 175 mm, a lower bottom of 185 mm and a high of 150 mm, the influence of the content of PVA fiber, the content and the type of nano-particles on the impermeability of cement matrix composites is obtained. The test age is 1 d. According to the crack resistance test of 900mm 脳 600mm 脳 20mm plate, the test results were analyzed by the evaluation method of the crack resistance of cement mortar, and the content of PVA fiber was obtained. The effect of the content and type of nano-particles on the crack resistance of cement matrix composites.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB332

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