本文關(guān)鍵詞： 自節(jié)能墻體 砌筑保溫砂漿 抹面保溫砂漿 溫度應(yīng)力 墻體變形　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：加氣混凝土作為唯一能滿足建筑節(jié)能65%的單一墻體材料,因輕質(zhì)、保溫、優(yōu)異的抗震性能同時兼具一定強(qiáng)度,被廣泛的用作建筑結(jié)構(gòu)填充墻。在使用普通水泥砂漿砌筑和抹面時,容易出現(xiàn)墻體熱橋、表面砂漿開裂、脫落等問題。針對這些問題,本文研究了加氣混凝土用砌筑和抹面保溫砂漿,保溫砂漿在強(qiáng)度和熱工性能上都能滿足加氣混凝土墻體的使用,同時也對墻體的溫度場、溫度應(yīng)力進(jìn)行分析計算。采用�；⒅闉檩p骨料,配制加氣混凝土砌筑用保溫砂漿。當(dāng)�；⒅閾搅繛樗噘|(zhì)量的60%、粉煤灰取代量為25%、膠粉摻量為2.0%時,砂漿的抗壓強(qiáng)度達(dá)5.8 MPa,導(dǎo)熱系數(shù)也可以達(dá)到0.13 W/(m·K),滿足抗壓強(qiáng)度5.0 MPa導(dǎo)熱系數(shù)小于0.15 W/(m·K)的目標(biāo)值。在此基礎(chǔ)上,探究了不同灰縫厚度時加氣混凝土砌體的力學(xué)性能,厚灰縫砌體抗壓強(qiáng)度達(dá)到3.72 MPa,薄灰縫砌體的抗壓強(qiáng)度、剪切強(qiáng)度分別為3.10 MPa和0.222 MPa。以�；⒅�、水泥、粉煤灰、Ca(OH)2、聚丙烯纖維及其他外加劑為原材料,配制加氣混凝土專用抹面保溫砂漿。當(dāng)水泥、粉煤灰、Ca(OH)2、�；⒅�、聚丙烯纖維纖維、可再分散乳膠粉、羥丙基甲基纖維素醚以及減水劑、引氣劑的質(zhì)量比為83:10:7:100:0.6:1.5:0.6:0.3:0.02時,抹面保溫砂漿的抗壓強(qiáng)度可達(dá)2.6 MPa,抗折強(qiáng)度達(dá)0.7 MPa,粘結(jié)強(qiáng)度為0.43 MPa,砂漿的壓折比小于3,蒸汽滲透系數(shù)為0.88×10-4 g/(m·h·Pa)。針對加氣混凝土墻體在使用過程中出現(xiàn)的溫度應(yīng)力以及溫度變形,運(yùn)用ANSYS軟件進(jìn)行模擬分析。結(jié)果表明,外抹保溫砂后,墻體基體在冬季、夏季的溫度變化分別降低1.668℃和5.315℃,嵌固墻板界面處溫度應(yīng)力降低49%,自由墻板界面處溫度應(yīng)力降低30%,墻體變形也更小。
[Abstract]:Aerated concrete, as the only single wall material that can meet the energy saving of 65% buildings, has a certain strength because of its light weight, heat preservation and excellent seismic performance. It is widely used as the filling wall of building structure. When using ordinary cement mortar to build and wipe the surface, it is easy to appear the wall hot bridge, the surface mortar crack, the fall off and so on. In order to solve these problems, In this paper, the masonry and surface insulation mortar for aerated concrete are studied. The thermal properties and strength of insulation mortar can satisfy the use of aerated concrete wall, and at the same time, the temperature field of the wall is also studied. The thermal stress is analyzed and calculated. The thermal insulation mortar for aerated concrete masonry is prepared by using vitrified microbeads as light aggregate. When the content of glass microbeads is 60% of cement quality, the amount of replacement of fly ash is 25 and the amount of rubber powder is 2.0. The compressive strength of mortar is 5.8 MPA, and the thermal conductivity can reach 0.13 W / m 路KG, which satisfies the target value of compressive strength 5.0 MPa < 0.15 W / m 路K. On this basis, the mechanical properties of aerated concrete masonry with different thickness of ash joint are investigated. The compressive strength of thick ash joint masonry is 3.72 MPA, and the compressive strength and shear strength of thin ash joint masonry are 3.10 MPa and 0.222 MPa respectively. The raw materials are vitrified microbeads, cement, fly ash, polypropylene fiber and other admixtures. When cement, fly ash, glass microbeads, polypropylene fiber fiber, redispersible emulsion powder, hydroxypropyl methyl cellulose ether and water reducer, the mass ratio of air entraining agent is 83: 10: 10: 1: 1: 1: 1: 1: 0. 3: 0. 02. The compressive strength, flexural strength, bond strength, compression ratio and steam permeability coefficient of mash mortar are 2.6 MPA, 0.7 MPA, 0.43 MPA, and 0.88 脳 10 ~ (-4) g / m 路h 路Pa, respectively. The temperature stress and deformation of aerated concrete wall are analyzed. ANSYS software is used to simulate and analyze. The results show that the temperature changes of the wall matrix in winter and summer are reduced by 1.668 鈩，

本文編號：1514903