本文選題：混凝土裂縫 + 自修復(fù)��； 參考：《中國地質(zhì)大學(xué)(北京)》2017年碩士論文

【摘要】：混凝土在使用過程中會(huì)產(chǎn)生裂紋和局部損傷。傳統(tǒng)的事后修復(fù)的方式已經(jīng)無法滿足現(xiàn)代社會(huì)的要求。自修復(fù)技術(shù)可以解決傳統(tǒng)方法難以解決的技術(shù)問題,對(duì)確保工程的安全和耐久性具有長遠(yuǎn)意義。目前對(duì)混凝土基體、修復(fù)容器、修復(fù)膠粘劑的選擇及相互之間的匹配性,修復(fù)容器對(duì)混凝土自身強(qiáng)度的影響,修復(fù)效果等問題的研究還停留在試驗(yàn)探索階段,本文從自修復(fù)機(jī)理和實(shí)驗(yàn)方面進(jìn)行研究,旨在為推廣混凝土自修復(fù)技術(shù)奠定理論基礎(chǔ)。以復(fù)合材料理論為依據(jù),建立了混凝土中的玻璃管與構(gòu)件的相互作用力學(xué)分析模型,綜合考慮玻璃管取向、長度因素,引入玻璃管不規(guī)則分布有效系數(shù),導(dǎo)出摻入不規(guī)則分布玻璃管的混凝土的應(yīng)力公式。基于彈性斷裂力學(xué)基本原理,引入纖維間距理論,推導(dǎo)出玻璃管間距的表達(dá)式,分析了玻璃短管體積率、直徑、長度、分布方式對(duì)玻璃短管間距的影響規(guī)律。根據(jù)自修復(fù)混凝土的作用機(jī)理,進(jìn)行了自修復(fù)膠粘劑的粘度、流動(dòng)性能、抗拉粘接強(qiáng)度、抗彎粘接強(qiáng)度等性能測試試驗(yàn),根據(jù)試驗(yàn)結(jié)果選取改性的環(huán)氧樹脂膠粘劑作為修復(fù)膠粘劑。根據(jù)前人研究成果選取石英玻璃套管作為修復(fù)容器,進(jìn)行了不含自修復(fù)系統(tǒng)、兩種不同的數(shù)量及布置方式修復(fù)系統(tǒng)的混凝土裂縫的自修復(fù)對(duì)比試驗(yàn),分析了空心玻璃管數(shù)量和布置方式對(duì)混凝土裂縫修復(fù)效果的影響。對(duì)三組標(biāo)準(zhǔn)養(yǎng)護(hù)條件下養(yǎng)護(hù)至齡期后的自修復(fù)混凝土試件進(jìn)行了修復(fù)效果的測試試驗(yàn),通過抗彎強(qiáng)度、自修復(fù)容器中膠粘劑的流出狀況、混凝土膠粘面破壞方式、二次粘接后抗彎強(qiáng)度,檢驗(yàn)了自修復(fù)效果。
[Abstract]:Cracks and local damage will occur in concrete during use. The traditional way of post-repair can no longer meet the requirements of modern society. Self-repair technology can solve the technical problems which are difficult to be solved by traditional methods. It is of long-term significance to ensure the safety and durability of engineering. At present, the research on the selection of concrete matrix, repair container, repair adhesive and the matching between each other, the influence of repairing container on concrete strength, the repair effect and so on, is still in the stage of test and exploration. In this paper, the self-repairing mechanism and experiment are studied in order to lay a theoretical foundation for popularizing the self-repairing technology of concrete. Based on the theory of composite materials, a mechanical analysis model of the interaction between glass tubes and members in concrete is established. Considering the orientation and length of glass tubes, the effective coefficient of irregular distribution of glass tubes is introduced. The stress formula of concrete mixed with irregularly distributed glass pipe is derived. Based on the basic principle of elastic fracture mechanics, the expression of glass tube spacing is derived by introducing the theory of fiber spacing, and the influence of volume ratio, diameter, length and distribution of glass tube on the spacing of glass short tube is analyzed. According to the mechanism of self-repairing concrete, the properties of self-repairing adhesive, such as viscosity, fluidity, tensile bonding strength and flexural adhesion strength, were tested. According to the experimental results, the modified epoxy resin adhesive was selected as the repair adhesive. According to the previous research results, quartz glass casing was selected as the repair vessel, and the self-repairing tests of concrete cracks without self-repairing system, two different numbers and different arrangement methods were carried out. The effect of the number and arrangement of hollow glass pipe on the effect of concrete crack repair is analyzed. Three groups of self-repairing concrete specimens after curing to age under standard curing conditions were tested and tested. Through bending strength, adhesive outflow in self-repairing container and failure mode of concrete adhesive surface, the test was carried out on three groups of self-repairing concrete specimens under standard curing conditions. The self-repairing effect is tested by the flexural strength after secondary bonding.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU528
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本文編號(hào)：1807254