本文選題：空心玻璃微珠 + 水泥基　； 參考：《河南工業(yè)大學(xué)》2015年碩士論文

【摘要】：隨著社會的發(fā)展,能源危機正在逐步增加,近年來中國的節(jié)能減排等相關(guān)政策也進行了大力宣傳,研發(fā)出抗震性能好、造價成本低、建筑能耗低、節(jié)約土地的建筑體系,是當(dāng)今建筑領(lǐng)域重要的研究課題。在這樣的背景下,對中空玻璃微珠水泥基復(fù)合材料進行熱學(xué)實驗和理論分析研究具有重要的意義[1]�？招牟Ａ⒅�(Hollow Glass Microsphere,HGM)是一種空心球輕質(zhì)芯材,具有無毒性、表面光滑、填充后分散非常均勻以及流動性好等優(yōu)點,抗壓強度相對而言也比較高,保溫隔熱性和耐火性能優(yōu)越,用于建筑節(jié)能和建筑防火方面是非常的合適的。并且這種材料物理化學(xué)性能比較穩(wěn)定,隔聲性能好。已在航空、航天、土木、機械、物理、化學(xué)等領(lǐng)域得到了重要應(yīng)用[2]。隨著科研水平的提高和科研設(shè)備的更新?lián)Q代,空心玻璃微珠的制備技術(shù)也不斷的提高,因此空心玻璃微珠的應(yīng)用領(lǐng)域和范圍也在不斷的擴展,從早期傳統(tǒng)的簡單填充材料時代,現(xiàn)在則慢慢發(fā)展為功能性的材料�？招牟Ａ⒅榈膬�(nèi)部結(jié)構(gòu)比較特殊,它是一種內(nèi)部空心的結(jié)構(gòu),這種結(jié)構(gòu)就形成了比較大的比表面積,因此空心玻璃微珠可以為填充基體時提供比較大的接觸面和反應(yīng)空間。玻璃微珠質(zhì)輕,用其填充水泥后,能制作成容重非常小的混凝土材料,本文重點研究了微珠(HGM)增強水泥形成微珠水泥基復(fù)合材料后,研究微珠的摻入量、微珠壁厚、水泥導(dǎo)熱系數(shù)的變化,對玻璃微珠水泥基復(fù)合材料的導(dǎo)熱性能的影響。本文通過創(chuàng)建HGM/水泥復(fù)合材料的代表體元的模型,對HGM填充水泥形成的復(fù)合材料的導(dǎo)熱性能用ABAQUS進行了二維的有限元數(shù)值仿真分析,從復(fù)合材料微觀層面上分析其熱學(xué)行為;同時,利用JW—3型導(dǎo)熱系數(shù)測定儀來測定不同微珠摻量下的復(fù)合材料導(dǎo)熱系數(shù),從宏觀層面上分析了空心玻璃微珠摻入量對復(fù)合材料保溫隔熱性能的影響。本文將從仿真和實驗相結(jié)合的角度建立高性能空心玻璃微珠水泥基復(fù)合材料細觀結(jié)構(gòu)演化模型,研究微珠增強水泥后宏觀的熱性能與微珠空心結(jié)構(gòu)的依賴關(guān)系。本文研究的主要內(nèi)容有:1、宏觀熱學(xué)實驗:當(dāng)微珠摻入量分別為0%、5%、10%、15%、20%、25%、30%時,將這些試件分別在JW—3型導(dǎo)熱系數(shù)測定儀上進行熱學(xué)實驗,將宏觀熱學(xué)實驗得出的數(shù)據(jù)與有限元仿真分析的數(shù)據(jù)進行對比。2、仿真數(shù)值模擬:將ABAQUS仿真技術(shù)與細觀的熱學(xué)理論相結(jié)合,水泥中摻入微珠后,形成的復(fù)合材料的微觀結(jié)構(gòu)特點,以空心玻璃微珠位于水泥基的中心為模型,建立具有代表性的計算體元。通過有限元分析,求解計算體元的溫度場、熱流矢量等。從而得到復(fù)合材料的等效導(dǎo)熱參數(shù)[3]。
[Abstract]:With the development of society, the energy crisis is gradually increasing. In recent years, China's energy saving and emission reduction policies have been vigorously publicized, and a building system with good seismic performance, low cost, low building energy consumption and land saving has been developed. It is an important research topic in the field of architecture nowadays. In this context, thermal experiments and theoretical analysis of hollow glass bead cement matrix composites are of great significance. Hollow Glass Microsphere HGM (HGM) is a kind of hollow sphere lightweight core material, which has the advantages of non-toxicity, smooth surface, uniform dispersion after filling and good fluidity. The compressive strength is relatively high, and the thermal insulation and fire resistance are superior. It is very suitable for building energy saving and building fire protection. And the physical and chemical properties of this material are stable and sound insulation is good. It has been widely used in aeronautics, aerospace, civil engineering, mechanics, physics, chemistry and so on. With the improvement of scientific research level and the replacement of scientific research equipment, the preparation technology of hollow glass bead has been continuously improved. Therefore, the application field and scope of hollow glass microspheres have been continuously expanded from the early era of simple filling materials. Now it is slowly developing into functional materials. The inner structure of hollow glass beads is very special. It is a kind of inner hollow structure, which forms a relatively large specific surface area. Therefore, hollow glass beads can provide a relatively large contact surface and reaction space for filling the matrix. Glass beads are light in weight and can be made into concrete materials with very small bulk density by filling them with cement. This paper focuses on the study of the content of microbeads and the thickness of microbeads after HGM reinforced cement is formed into microbead cement matrix composites. The influence of the change of thermal conductivity of cement on the thermal conductivity of glass microbead cement matrix composites. In this paper, the thermal conductivity of HGM / cement composite is analyzed by using Abaqus, and the thermal behavior of HGM / cement composite is analyzed from the microcosmic level by creating the model of representative volume element of HGM / cement composite. At the same time, the thermal conductivity of composites with different content of microbeads was measured by JW-3 thermal conductivity tester. The influence of the content of hollow glass beads on the thermal insulation properties of composites was analyzed from the macro level. In this paper, the microstructural evolution model of high performance hollow glass microbead cement matrix composites is established from the point of view of simulation and experiment, and the dependence of macroscopical thermal properties of microbead reinforced cement on microbead hollow structure is studied. The main contents of this paper are: 1, macroscopical thermal experiments: when the amount of microbeads added is 0, 10, 15, 20, 25, and 30, respectively, these specimens are carried out thermal experiments on the JW-3 thermal conductivity meter. Comparing the data obtained from macroscopic thermal experiment with the data of finite element simulation analysis. 2. Simulation numerical simulation: combining Abaqus simulation technology with meso-thermal theory, the microstructure characteristics of composite formed by mixing microbeads in cement, Based on the model of hollow glass beads located at the center of cement base, a representative computational volume element is established. Through finite element analysis, the temperature field, heat flux vector and so on are solved. Thus, the equivalent thermal conductivity parameters of the composites [3] are obtained.
【學(xué)位授予單位】：河南工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU528

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本文編號：2104826