【摘要】：將廢舊輪胎等橡膠制品粉碎制成不同規(guī)格的橡膠顆粒，然后將橡膠顆粒以一定的摻配方式摻入混凝土中，所形成的復(fù)合材料稱為橡膠混凝土。已有研究和工程實(shí)踐表明，與普通混凝土相比，橡膠混凝土的抗壓、抗拉等靜力性能有所下降，但其耐久性能、抗沖擊性能、熱工性能等均得到不同程度的改善，且橡膠混凝土的研制和應(yīng)用為廢舊橡膠的回收再利用提供了新的途徑，具有顯著的環(huán)保效益。但與力學(xué)性能研究相比，橡膠混凝土的耐久性能研究較少，且缺乏系統(tǒng)性的研究和規(guī)律性的結(jié)論，阻礙了橡膠混凝土的推廣應(yīng)用。 本文以橡膠混凝土的耐久性能為研究對象，以試驗(yàn)研究為主要手段，將5-8目、30-40目、60-80目等三種粒徑的橡膠顆粒，按5%、10%、15%的比率等體積取代混凝土中的細(xì)骨料制備了橡膠混凝土，重點(diǎn)對橡膠混凝土的抗凍融循環(huán)性能、抗氯離子滲透性能、抗碳化性能等耐久性指標(biāo)進(jìn)行了系統(tǒng)研究，并研究了凍融循環(huán)和氯離子滲透二種情況的耦合作用，得出了隨橡膠粒徑和摻量變化對橡膠混凝土各耐久性指標(biāo)的影響規(guī)律，基于試驗(yàn)結(jié)果和已有經(jīng)驗(yàn)公式，建立了各耐久性指標(biāo)的劣化模型。研究結(jié)果表明，橡膠顆粒的摻入明顯改善了混凝土的抗凍融循環(huán)性能和抗氯離子滲透性能，，橡膠顆粒粒徑越小改善效果越明顯，抗凍融循環(huán)性能改善的最佳摻量為10%，抗氯離子滲透性能改善的最佳摻量為5%；橡膠顆粒的摻入可以改善混凝土的抗碳化性能，但效果不明顯，最優(yōu)摻量為10%；凍融循環(huán)后橡膠混凝土的抗氯離子滲透性能下降明顯，且隨著凍融循環(huán)次數(shù)的增加下降趨勢越來越明顯，綜合考慮抗凍融循環(huán)性和抗氯離子滲透性能，最優(yōu)摻量為10%。
[Abstract]:Rubber particles of different specifications are made from rubber products such as waste tires, and then rubber particles are mixed into concrete in a certain way. The composite material is called rubber concrete. The research and engineering practice show that compared with ordinary concrete, the static properties of rubber concrete, such as compressive and tensile resistance, are decreased, but the durability, impact resistance and thermal performance of rubber concrete are improved to some extent. The development and application of rubber concrete provide a new way for recycling waste rubber. However, compared with the study of mechanical properties, the study of durability of rubber concrete is less, and lack of systematic research and regular conclusion, which hinders the popularization and application of rubber concrete. In this paper, taking the durability of rubber concrete as the research object and taking the experimental study as the main means, three kinds of rubber particles, such as 5-8 mesh, 30-40 mesh and 60-80 mesh, were prepared by replacing the fine aggregate in the concrete at the ratio of 51010% to 15%, and the rubber particles of 5-8 mesh, 30-40 mesh and 60-80 mesh were substituted for the fine aggregate in the concrete. The durability indexes of rubber concrete, such as anti-freezing and thawing cycle performance, chloride ion penetration resistance and carbonation resistance, are studied systematically, and the coupling effects between freeze-thaw cycle and chloride ion permeation are studied. The influence of rubber particle size and content on the durability index of rubber concrete is obtained. Based on the experimental results and empirical formulas, the deterioration model of each durability index is established. The results show that the mixing of rubber particles obviously improves the freeze-thaw resistance and chloride ion permeability of concrete, and the smaller the size of rubber particles, the more obvious the improvement effect is. The optimum content of improving the anti-freeze-thaw cycle performance is 10%, the best content of improving the chlorine ion permeation property is 5%, the addition of rubber particles can improve the carbonation resistance of concrete, but the effect is not obvious, the optimum content is 10%. After freeze-thaw cycle, the resistance to chloride ion permeability of rubber concrete decreased obviously, and with the increase of freeze-thaw cycle times, the decreasing trend was more and more obvious. Considering the anti-freezing and thawing cycle resistance and chloride ion permeation performance, the optimum content was 10.
【學(xué)位授予單位】：沈陽大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU528

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