本文選題：輕骨料混凝土 + 配合比　； 參考：《哈爾濱工業(yè)大學》2015年碩士論文

【摘要】：以不可再生能源為主的時代,節(jié)能的需求日益旺盛。保溫砌塊作為輕質(zhì)、保溫的建筑材料也成為了一種比較熱門的商品與研究對象。為了研究孔洞對砌塊傳熱性能的影響,本文對使用保溫砌塊所用的輕骨料混凝土、砂漿進行了研究并對砌塊的傳熱性能進行了模擬。本文使用粘土陶粒、頁巖陶粒、爐渣等原料設(shè)計并配制了針對不同強度的輕骨料混凝土。通過采用公式估算,一定程度上簡化了輕骨料混凝土的配合比設(shè)計。制得的輕骨料混凝土均能達到預期的強度要求。其中,以頁巖陶粒為原料比采用粘土陶粒能達到更高的強度并保持近似的表觀密度。使用兩種陶粒的輕骨料混凝土導熱系數(shù)較為一致,而表觀密度更高的爐渣混凝土導熱系數(shù)比前兩者更高。高強陶粒制得的混凝土表觀密度最高,其強度與導熱系數(shù)均高于其它原料。本文使用陶砂與細爐渣顆粒作為部分替代普通砂的原料,用以配制具有保溫性能的砌筑砂漿。當上述材料摻量較少時,砂漿性能并未出現(xiàn)明顯變化。當摻量逐步增大后,導熱系數(shù)對應分別下降了53%與34%。比較得出選用合適的粒徑并使原料超過一定臨界摻量才能得到較低的導熱系數(shù)。根據(jù)數(shù)據(jù),采串并聯(lián)計算方法對一種砌體的傳熱系數(shù)進行了計算。然后,采用熱箱法對同樣砌體的傳熱系數(shù)進行了測定。實測值同計算值進行比較,得出計算值同測定值僅相差11.5%。表明計算方法估算傳熱系數(shù)是可行的,并且準確性良好。最后本文使用ANSYS Work Bench軟件建立砌塊的3D模型,對多個砌塊模型進行了傳熱模擬分析。其中相鄰兩排的縱向肋邊緣間距在40mm之上時方能較好地增大熱阻。結(jié)果表明,縱向肋的對稱分布比不對稱分布方式更利于熱阻提升�？锥磳訑�(shù)增加可以增加砌塊內(nèi)部的形狀復雜性,并有效提升熱阻。
[Abstract]:In the era of non-renewable energy, the demand for energy conservation is increasingly strong. Thermal insulation block as a lightweight, thermal insulation building material has become a hot commodity and research object. In order to study the influence of holes on the heat transfer performance of block, the light aggregate concrete and mortar used in insulating block are studied and the heat transfer performance of block is simulated in this paper. In this paper, lightweight aggregate concrete with different strength is designed and prepared by using clay ceramsite, shale ceramsite, slag and other raw materials. By using formula estimation, the mix ratio design of lightweight aggregate concrete is simplified to some extent. The light aggregate concrete can meet the expected strength requirement. Using shale ceramsite as raw material can achieve higher strength and maintain approximate apparent density than clay ceramsite. The thermal conductivity of lightweight aggregate concrete with two kinds of ceramsite is consistent, while the thermal conductivity of slag concrete with higher apparent density is higher than that of the former two. The concrete made of high strength ceramsite has the highest apparent density and its strength and thermal conductivity are higher than those of other raw materials. In this paper, ceramic sand and fine slag particles are used as raw materials to partly replace common sand to prepare masonry mortar with thermal insulation. When the content of the above materials is low, the properties of mortar do not change obviously. The thermal conductivity decreases by 53% and 34% respectively. It is concluded that the lower thermal conductivity can be obtained by selecting the appropriate particle size and making the raw material exceed a certain critical content. According to the data, the heat transfer coefficient of a masonry is calculated by the method of series-parallel calculation. Then, the heat transfer coefficient of the same masonry is measured by hot box method. By comparing the measured value with the calculated value, the difference between the calculated value and the measured value is only 11.5%. It shows that the calculation method is feasible and accurate in estimating the heat transfer coefficient. Finally, the 3D model of block is established by using ANSYS Work Bench software, and the heat transfer simulation of several block models is carried out. The thermal resistance can be increased only when the adjacent two rows of longitudinal rib edges are spaced above the 40mm. The results show that the symmetrical distribution of longitudinal ribs is more favorable to the thermal resistance than the asymmetric distribution. Increasing the number of hole layers can increase the complexity of the shape of the block and effectively raise the thermal resistance.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU528.2;TU522.3

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本文編號：1931921