【作者】 曾海燕；

【导师】 晏石林；

【作者基本信息】 武汉理工大学 ， 固体力学， 2004， 硕士

【摘要】 树脂混凝土是一种新型的高效多功能材料，由于它具有高强、高抗滲、耐腐蚀、耐磨耗、电绝缘和快硬化等优点。因此，在建筑工程、水利工程、道路工程等具有广阔的应用前景。由于它具有良好的耐腐蚀性能，是目前国内外防腐蚀工程中使用效果较好的主要材料之一。到目前为止，树脂混凝土已经在防腐蚀整体地面、设备沟槽等工程中得到广泛的使用。但是，与普通水泥混凝土一样，树脂混凝土的拉、压强度比比较低，研究采用有效的方法改善树脂混凝土的抗拉性能具有重要的理论与实际意义。 本文首先应用应力传递理论、纤维间距理论和复合材料机理对短纤维增强树脂混凝土的增强机理进行了初步分析；然后，在呋喃树脂混凝土(砂浆)中加入杜拉纤维，对其力学性能进行了研究。研究确定呋喃树脂混凝土的配方后，加入不同含量、不同长度的杜拉纤维，通过对其力学性能(抗压强度、劈裂抗拉强度、抗折强度)的测试，确定杜拉纤维的合适长度和最佳掺量；在呋喃树脂砂浆中加入不同含量、同一长度的杜拉纤维，通过其力学性能的测试，确定杜拉纤维的最佳掺量，探索了杜拉纤维增强呋喃树脂混凝土(砂浆)的破坏机理。最后，为改善杜拉纤维与呋喃树脂砂浆的界面粘结性能，采用杜拉纤维用不同的硅烷偶联剂处理后再加入到呋喃树脂砂浆中，测试其力学性能。同时，对硅烷偶联剂的作用机理进行了初步分析。结果表明：在呋喃树脂混凝土(砂浆)中加入杜拉纤维，可提高其抗拉强度、抗折强度和冲击韧性；经硅烷偶联剂WD-60处理后的杜拉纤维对其抗拉强度、抗折强度有大幅度提高。本课题的研究对于提高树脂混凝土(砂浆)及其结构的力学性能和耐腐蚀性能、拓展树脂混凝土的应用范围具有重要的理论与实际意义。更多还原

【Abstract】 Polymers concrete has been identified as a newly multifunctional material due to its high strength, high anti-permeability, and anti-corrosion, nonconductive and harden fast properties. It has expansive application foreground in construct engineering, irrigation works and civil engineering. Since its predominant anti-erosion, polymer concrete is one of efficient materials, which are used in anti-erosion engineering in and out of the country. Up to now, polymer concrete has been increasingly used in some engineering, such as anti-erosion monolithic floor and equipment groove. However, as same as plain concrete, the ratio of polymer concrete’s tensile strength and its compressive strength is very small. Hence, it is significant in theory and practice to research an effective way to improve the tensile strength of polymer concrete.In this paper, the strengthen mechanism of fiber chop was firstly analyzed based on stress transfer theory, fiber space theory and composite mechanism of fiber reinforced polymer concrete was studied, an then the mechanical properties of the polymer concrete was studied, which was mixed with Durafiber. After determined the proportion of furan resin concrete, it mixed with Durafiber of vary content and vary length, then the most fitting length and proportion of Durafiber were determined by testing its mechanical properties (compressive strength, tensile strength and bending strength). The mechanical properties of furan polymer mortar were tested also, which is mixed with Durafiber of changeless length and vary content, and the most fitting content of Durafiber was determined. At last, in order to improve the interfacial bond strength, Durafiber pretreated by variable silane coupling agentswere mixed into furan polymer mortar, then make its mechanic properties testing. The results show that the tensile strength and rupture strength of furan polymer concrete were improved when the Durafiber was used; and Durafiber pretreated by WD-60 silane coupling agent can enhance the strengths(the tensile strength, rupture strength and impact toughness) greatly,. All of this is significant in theory and practice to improve mechanic and anti-corrosion properties of polymer concrete and its structure, and expand its use range.更多还原