本文選題：蒸壓加氣混凝土自保溫砌塊 + 傳熱系數(shù)��； 參考：《華北水利水電大學(xué)》2017年碩士論文

【摘要】：隨著建筑節(jié)能在各地全面開展的大形勢(shì)下,作為節(jié)能墻材的蒸壓加氣混凝土自保溫砌塊一直引人矚目,并受到國(guó)家政策的鼓勵(lì)和支持,具有廣闊的發(fā)展前景。本文以B06級(jí)蒸壓加氣混凝土自保溫砌塊為例,開展了氣孔率、含水率和蒸壓加氣混凝土自保溫砌塊導(dǎo)熱系數(shù)關(guān)系的理論研究,開展了蒸壓加氣混凝土自保溫砌塊墻體傳熱性能的試驗(yàn)研究,也開展了蒸壓加氣混凝土自保溫砌塊墻體的灰縫、抹灰、墻厚與傳熱系數(shù)之間的關(guān)系的研究。本文的主要成果包括以下幾個(gè)方面:(1)對(duì)蒸壓加氣混凝土自保溫砌塊導(dǎo)熱系數(shù)理論模型的研究,得到如下結(jié)論:推導(dǎo)出了含濕狀態(tài)下能使模型計(jì)算結(jié)果與實(shí)測(cè)值較為吻合的有實(shí)際應(yīng)用價(jià)值的導(dǎo)熱系數(shù)理論模型,并指出蒸壓加氣混凝土自保溫砌塊的導(dǎo)熱系數(shù)隨著氣孔率的增加而減小、隨著含水率的增加而增加。(2)對(duì)蒸壓加氣混凝土自保溫砌塊墻體的傳熱性能試驗(yàn),得到如下結(jié)論:蒸壓加氣混凝土自保溫砌塊墻體傳熱系數(shù)的實(shí)測(cè)值處在0.5~0.6 W/(m2·K)范圍內(nèi),其傳熱系數(shù)比其他材料的墻體低,保溫隔熱效果更好;不同灰縫形式的蒸壓加氣混凝土自保溫砌塊墻體的傳熱系數(shù)實(shí)測(cè)值存在區(qū)別,抹灰后的蒸壓加氣混凝土自保溫砌塊墻體的傳熱系數(shù)實(shí)測(cè)值低于抹灰前的傳熱系數(shù)。(3)對(duì)蒸壓加氣混凝土自保溫砌塊墻體的微熱橋問題進(jìn)行了研究,得到如下結(jié)論:灰縫處的微熱橋問題顯著,砌筑砂漿種類、砌筑形式、灰縫厚度都對(duì)蒸壓加氣混凝土自保溫砌塊墻體的傳熱系數(shù)產(chǎn)生影響,當(dāng)采用薄灰縫(3~5mm左右)時(shí),選用薄層砌筑砂漿砌筑為宜,當(dāng)采用厚灰縫(≤20mm)時(shí),采用保溫砌筑砂漿進(jìn)行砌筑為宜;豎縫灰縫采用填塞巖棉方式的墻體保溫隔熱效果良好、施工速度快,且抗震等力學(xué)性能并不因此而減弱,該砌筑方式應(yīng)進(jìn)行推廣;蒸壓加氣混凝土自保溫砌塊墻體的傳熱系數(shù)隨著灰縫厚度的增加而增大,灰縫越厚,微熱橋問題越明顯,墻體能耗越大;計(jì)算出了灰縫對(duì)蒸壓加氣混凝土自保溫砌體導(dǎo)熱系數(shù)的修正系數(shù),為建筑節(jié)能設(shè)計(jì)提供理論指導(dǎo)和計(jì)算依據(jù)。蒸壓加氣混凝土自保溫砌塊墻體的傳熱系數(shù)隨著抹灰厚度的增加而減小,抹灰越厚,則墻體保溫隔熱越好,能耗越低。蒸壓加氣混凝土砌塊墻體的傳熱系數(shù)隨著墻體厚度的增加而減小,墻體越厚,則墻體能耗越小。
[Abstract]:With the development of building energy conservation all over the world, the autoclaved aerated concrete self-insulating block, as an energy-saving wall material, has been attracting attention, and has been encouraged and supported by national policies, and has a broad development prospects. Taking B06 autoclaved aerated concrete self-insulating block as an example, the relationship among porosity, moisture content and thermal conductivity of autoclaved aerated concrete self-insulating block is studied theoretically in this paper. The experimental study on the heat transfer performance of autoclaved aerated concrete self-insulating block wall is carried out, as well as the research on the relationship between the gray joint, plastering, wall thickness and heat transfer coefficient of autoclaved aerated concrete self-insulating block wall. The main achievements of this paper include the following aspects: 1) the theoretical model of thermal conductivity of autoclaved aerated concrete self-insulating block. The conclusions are as follows: a theoretical model of thermal conductivity with practical application value is derived, which can make the calculated results of the model agree with the measured values under the wet state. It is pointed out that the thermal conductivity of autoclaved aerated concrete self-insulating block decreases with the increase of porosity and increases with the increase of moisture content. The results are as follows: the measured heat transfer coefficient of autoclaved aerated concrete self-insulating block wall is in the range of 0.5 ~ 0.6 W/(m2 / K), its heat transfer coefficient is lower than that of other materials, and the thermal insulation effect is better; The measured heat transfer coefficient of autoclaved aerated concrete self-insulating block wall with different ash joints is different. The heat transfer coefficient of autoclaved aerated concrete self-insulating block wall after plastering is lower than that before plastering. The conclusions are as follows: the problem of micro-heat bridge in ash joints is obvious. The types of masonry mortar, masonry form and thickness of ash joints all have an effect on the heat transfer coefficient of autoclaved aerated concrete self-insulating block wall, when the thin ash joint is used, the heat transfer coefficient of the wall is about 3mm. It is appropriate to choose thin layer masonry mortar for masonry, when thick ash joint (鈮，

本文編號(hào)：1907011