橡胶混凝土抗冲磨、抗冲击性能的研究

发布时间：2018-05-29 02:10

本文选题：橡胶混凝土 + 表面处理　；参考：《郑州大学》2017年硕士论文

【摘要】：橡胶混凝土是以混凝土为基材,掺入橡胶颗粒配制而成的一种新型混凝土。国内外学者对橡胶混凝土的强度、耐久性能等已经进行了较为深入的研究工作。对于橡胶混凝土的抗冲磨性能和抗冲击性能还在初步研究阶段,若能进行系统研究后将橡胶混凝土应用并推广,不仅为解决水工混凝土冲磨问题提供了一种新的途径,同时还可以缓解因废旧橡胶引起的环境污染问题。本文主要研究内容包括两个部分:第一部分为橡胶混凝土抗冲磨性能和抗冲击性能的研究,该部分选取两种橡胶颗粒,对橡胶颗粒采用四种表面处理方法(不处理、水洗处理、NaOH溶液处理、NaOH溶液和KH570复合处理)进行处理,按两种掺量等体积取代砂配制橡胶混凝土,并对橡胶混凝土的工作性能、基本力学性能、抗冲磨性能和抗冲击性能进行研究;第二部分是应用分形理论评价橡胶混凝土抗冲磨性能,该部分在抗冲磨试验的基础上,采用盒计数法计算混凝土冲磨表面的分形维数,并以此分析各因素对橡胶混凝土抗冲磨性能的影响。本文的主要结论如下:(1)在一定范围内,掺入1~3mm橡胶颗粒混凝土拌和物的坍落度随着橡胶掺量的增大而增大,而掺入3~6mm橡胶颗粒混凝土拌和物的坍落度则先增大后减小;(2)将橡胶颗粒掺入混凝土中会降低混凝土的抗压强度,但同时在较大程度上提高了混凝土的抗冲磨强度和抗冲击强度;(3)橡胶颗粒粒径和掺量对橡胶混凝土抗冲磨性能影响较大,基准混凝土强度对橡胶混凝土抗冲击性能影响较大,改性处理方法对橡胶混凝土抗冲磨和抗冲击性能影响都较小,改性处理方法中,NaOH+KH570复合处理的效果最明显;(4)混凝土冲磨表面的分形维数与基准混凝土强度等级、橡胶颗粒粒径、橡胶掺量这三个影响因素呈负相关关系,随着上述三个因素的增大混凝土冲磨表面的分形维数逐渐减小,混凝土抗冲磨性能则逐渐提高。
[Abstract]:Rubber concrete is a new type of concrete which is made of concrete and rubber particles. The strength and durability of rubber concrete have been studied deeply by domestic and foreign scholars. The impact and wear resistance of rubber concrete is still in the preliminary research stage. If the rubber concrete can be applied and popularized after systematic study, it will not only provide a new way to solve the problem of hydraulic concrete grinding. At the same time, it can alleviate the environmental pollution caused by waste rubber. The main research contents of this paper include two parts: the first part is the research on the impact and abrasion resistance of rubber concrete. In this part, two kinds of rubber particles are selected, and four surface treatment methods are used for rubber particles. The rubber concrete was prepared with two kinds of equal volume sand instead of sand, and the working properties and basic mechanical properties of rubber concrete were obtained. The second part is the application of fractal theory to evaluate the impact wear resistance of rubber concrete. The effects of various factors on the impact and wear resistance of rubber concrete are analyzed. The main conclusions of this paper are as follows: (1) within a certain range, the slump of concrete mixed with 1~3mm increases with the increase of rubber content. However, the slump of concrete mixed with 3~6mm rubber particles increases first and then decreases.) the compressive strength of concrete is reduced by adding rubber particles into concrete. But at the same time, the impact wear strength and impact strength of concrete are improved to a large extent) the size and content of rubber particles have a great influence on the impact wear resistance of rubber concrete, and the impact resistance of rubber concrete is greatly affected by the strength of reference concrete. The effect of modified treatment method on the impact resistance and impact resistance of rubber concrete is small. The effect of NaOH KH570 compound treatment is the most obvious in the modified treatment method. The fractal dimension of grinding surface of concrete and the grade of standard concrete strength, the diameter of rubber particle are also studied. With the increase of the above three factors, the fractal dimension of the surface of concrete is gradually reduced, and the anti-wear performance of concrete is gradually improved.
【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】：TV431

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