發(fā)布時(shí)間：2018-03-05 16:19

  本文選題：加氣混凝土　切入點(diǎn)：保溫裝飾　出處：《哈爾濱工業(yè)大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：集輕質(zhì)、環(huán)保、隔音、隔熱、可加工型性強(qiáng)等優(yōu)點(diǎn)為一體的加氣混凝土，可使建筑墻體達(dá)到高效節(jié)能和環(huán)保的目的。然而，目前加氣混凝土的研制和生產(chǎn)多采用硫鋁酸鹽水泥、鎂鋁酸鹽水泥等特種水泥做膠凝劑，，不但成本高，而且耐久性差、后期強(qiáng)度低；此外，加氣混凝土在低干密度條件下，存在力學(xué)性能低、耐候性差、孔結(jié)構(gòu)欠佳等問(wèn)題，導(dǎo)致加氣混凝土在建筑外墻上的應(yīng)用受到限制。為此，本論文決定以改性的普通硅酸鹽水泥為主要膠凝劑、反射氟碳漆為裝飾涂料，在實(shí)驗(yàn)室制備低干密度（200kg/m3）、低導(dǎo)熱系數(shù)（0.055W/(m·K)）、高裝飾性和力學(xué)性能良好的保溫裝飾加氣混凝土板為目標(biāo)，主要從以下幾個(gè)方面進(jìn)行系統(tǒng)全面的研究。 首先，研究碳酸鋰、石膏對(duì)普通硅酸鹽水泥早期強(qiáng)度的影響，分別測(cè)定碳酸鋰及石膏用量對(duì)加氣混凝土漿料性能影響，最終確定當(dāng)碳酸鋰摻量為2.1%，石膏摻量為6.7%時(shí)，可使加氣混凝土漿料有較高的早期強(qiáng)度。在保證水料比為0.6的前提下，研究粉煤灰摻量、雙氧水摻量、中空玻璃微珠摻量、穩(wěn)泡劑摻量、聚羧酸減水劑摻量、聚丙烯纖維摻量對(duì)超輕加氣混凝土保溫性能和力學(xué)性能的影響，從而確定最佳原材料配比為：加氣劑雙氧水摻量7%、穩(wěn)泡劑摻量0.48%、生石灰摻量16%、聚丙烯纖維摻量0.24%、聚羧酸減水劑摻量0.67%左右、中空玻璃微珠摻量20%。在此條件下研制的加氣混凝土的主要性能指標(biāo)為干密度200kg/m3,導(dǎo)熱系數(shù)0.053W/(m·K)，抗壓強(qiáng)度0.17MPa，抗折強(qiáng)度0.09MPa。 其次，研制超輕加氣混凝土飾面板，一方面采用反射氟碳漆做裝飾涂料，不但增強(qiáng)了建筑體的美觀性，也降低了外界的熱負(fù)荷，使加氣混凝土的保溫性能再次提高；另一方面，因選用高強(qiáng)度無(wú)機(jī)硅酸鈣板做飾面層基板，可有效提高加氣混凝土板的力學(xué)性能，使復(fù)合后的保溫裝飾加氣混凝土板的抗折強(qiáng)度提高到0.33MPa，抗壓強(qiáng)度提高到0.19MPa。 最后，研究了超輕加氣混凝土的孔結(jié)構(gòu)與其基本性能之間的關(guān)系，分析出優(yōu)良性能加氣混凝土的氣孔結(jié)構(gòu)特征；并從其氣孔壁組成上研究超輕加氣混凝土漿料的水化機(jī)理、中空玻璃微珠的微觀作用機(jī)理和表面噴涂硅酸鹽的微觀作用機(jī)理。 通過(guò)以上研究所得的結(jié)論對(duì)于研制生產(chǎn)保溫裝飾超輕加氣混凝土復(fù)合板、提高建筑節(jié)能將具有顯著地指導(dǎo)意義。
[Abstract]:The aerated concrete with the advantages of light weight, environmental protection, sound insulation, heat insulation and strong processability can make the building wall achieve the purpose of high efficiency, energy saving and environmental protection. However, at present, sulphoaluminate cement is used in the development and production of aerated concrete. When special cement such as magnesium aluminate cement is used as gelling agent, not only the cost is high, but also the durability is poor, and the later strength is low. In addition, under the condition of low dry density, the aerated concrete has some problems such as low mechanical properties, poor weathering resistance, poor pore structure, etc. As a result, the application of aerated concrete on the exterior wall of buildings is restricted. Therefore, the modified ordinary Portland cement is chosen as the main gelling agent, and the reflective fluorocarbon paint is used as the decorative coating. The preparation of low dry density 200kg / m ~ (3) C, low thermal conductivity (0.055 W / m 路K ~ (-1)), high decorative and good mechanical properties of air-filled concrete slabs with thermal insulation and good mechanical properties were studied systematically and comprehensively in the following aspects. First of all, the influence of lithium carbonate and gypsum on the early strength of ordinary Portland cement is studied. The effects of lithium carbonate and gypsum content on the properties of aerated concrete paste are determined, and it is determined that when the amount of lithium carbonate and gypsum is 2.1 and 6.7 respectively, The content of fly ash, hydrogen peroxide, hollow glass beads, foaming stabilizer and polycarboxylic acid water reducer were studied on the premise that the water / material ratio was 0.6, and the ratio of water to material was 0.6, the content of fly ash, hydrogen peroxide, hollow glass microbeads, foaming stabilizer and polycarboxylic acid water reducer were studied. Effect of polypropylene fiber content on thermal insulation and mechanical properties of ultra-light aerated concrete, Thus, the optimum raw material ratio is determined as follows: air reagents, hydrogen peroxide, foam stabilizer, quicklime, polypropylene fiber, polycarboxylic acid water reducer and polycarboxylic acid water reducer, respectively, 7%, 0.48%, 16%, 0.24 and 0.67%, respectively. Under these conditions, the main performance indexes of the aerated concrete are dry density 200kg / m ~ (3), thermal conductivity 0.053 W / m 路K ~ (-1), compressive strength 0.17 MPA and flexural strength 0.09 MPA. Secondly, the development of ultra-light aerated concrete decorative panel, on the one hand, the use of reflective fluorocarbon paint as decorative paint, not only enhance the beauty of the building, but also reduce the external heat load, so that the insulation performance of aerated concrete is improved again; On the other hand, the mechanical properties of aerated concrete slab can be improved effectively by using high strength inorganic calcium silicate board as the veneer substrate, and the flexural strength and compressive strength of the composite thermal insulation decorative aerated concrete slab can be increased to 0.33 MPA and 0.19 MPA respectively. Finally, the relationship between the pore structure and the basic properties of ultra-light aerated concrete is studied, and the pore structure characteristics of the fine performance aerated concrete are analyzed, and the hydration mechanism of the ultra-light aerated concrete paste is studied from its pore wall composition. The microcosmic action mechanism of hollow glass bead and the microcosmic action mechanism of surface sprayed silicate. The conclusions obtained from the above study will be of great significance for the development and production of ultra-light aerated concrete composite slabs with thermal insulation and decoration and the improvement of building energy conservation.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU528.2

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本文編號(hào)：1570992