本文選題：花崗巖石粉 + 加氣砌塊�。� 參考：《濟(jì)南大學(xué)》2017年碩士論文

【摘要】：本文采用高溫高壓蒸養(yǎng)工藝,以磨細(xì)花崗巖石粉為主要原材料,以石灰、石膏、水泥、引氣劑、發(fā)泡劑等為輔助原料,通過研究并調(diào)整工藝條件及原料配比,得到各原材料及實(shí)驗(yàn)條件對(duì)加氣砌塊性能的影響規(guī)律。制備出集輕質(zhì)、隔熱、抗收縮、防火、施工方便等優(yōu)點(diǎn)于一體并符合國(guó)家標(biāo)準(zhǔn)要求的保溫材料—蒸壓加氣混凝土保溫砌塊。蒸壓時(shí)間和蒸壓壓力對(duì)干密度和抗壓強(qiáng)度的影響較要大于石粉細(xì)度。隨著蒸壓時(shí)間的延長(zhǎng),砌塊的干密度和吸水率皆先增大后減小,抗壓強(qiáng)度逐漸增大。隨著蒸壓壓力的提高,干密度和吸水率皆先減小后增大,抗壓強(qiáng)度先增大后減小。最佳蒸壓時(shí)間為8h,蒸壓壓力為1.0MPa,石粉細(xì)度為523 m2/kg。隨著水料比和鋁粉膏摻量的增加,砌塊的干密度和抗壓強(qiáng)度均降低,吸水率增大。隨著水泥摻量的增加,抗壓強(qiáng)度增大,但摻量過多對(duì)強(qiáng)度的提高不明顯。得到較優(yōu)配比的加氣砌塊,其干密度622kg/m3,吸水率59.5%,抗壓強(qiáng)度4.2MPa,達(dá)到B06級(jí)砌塊的標(biāo)準(zhǔn)要求。調(diào)整水料比,鋁粉膏摻量和水泥摻量,得到優(yōu)化配比的加氣砌塊,其干密度684kg/m3,吸水率55.2%,抗壓強(qiáng)度5.4MPa,達(dá)到B07級(jí)加氣砌塊的標(biāo)準(zhǔn)要求。單因素實(shí)驗(yàn)得到引氣劑,生石灰和石膏摻量對(duì)砌塊性能的影響規(guī)律,并確定了最佳摻量,得到砌塊最優(yōu)配合比,即水料比0.475,鋁粉膏摻量0.1wt%,水泥摻量21wt%,花崗巖石粉摻量59wt%,引氣劑摻量0.1wt%,生石灰摻量12wt%,石膏摻量5wt%,砌塊干密度818 kg/m3,吸水率48.5%,抗壓強(qiáng)度8.6MPa,滿足B08級(jí)加氣砌塊的標(biāo)準(zhǔn)要求。通過導(dǎo)熱系數(shù)與干密度的線性擬合方程,得出較優(yōu)配比的B06、B07、B08級(jí)加氣砌塊的導(dǎo)熱系數(shù)分別為0.16、0.17、0.20 W/(m.K),均符合國(guó)家標(biāo)準(zhǔn)要求。采用XRD和SEM等技術(shù)手段研究了花崗巖石粉加氣砌塊水化產(chǎn)物的種類、結(jié)構(gòu)和形貌特征,水化產(chǎn)物主要是各種形式的托勃莫來石、C-S-H凝膠,水化硅酸鈣,以及未反應(yīng)的石英顆粒。砌塊中的宏觀孔是一些相互獨(dú)立、互不聯(lián)通的封閉孔,孔徑大約在1.5-3mm之間。微觀孔由各水化產(chǎn)物相互交叉連接而形成,孔徑大約在1μm~3μm之間。
[Abstract]:In this paper, high temperature and high pressure steaming technique is adopted, with fine granitic rock powder as main raw material, lime, gypsum, cement, air entraining agent, foaming agent and so on as auxiliary raw materials. The effects of raw materials and experimental conditions on the properties of aerated block are obtained. The insulation material, autoclaved aerated concrete insulation block, which has the advantages of light weight, heat insulation, anti-shrinkage, anti-fire and convenient construction, has been prepared. The effect of autoclaving time and pressure on dry density and compressive strength is larger than that of stone powder. With the increase of autoclaving time, the dry density and water absorption of block increase first and then decrease, and the compressive strength increases gradually. With the increase of autoclaved pressure, the dry density and water absorption decreased first and then increased, and the compressive strength first increased and then decreased. The optimum autoclaving time is 8 h, the autoclaved pressure is 1.0 MPA, the fineness of stone powder is 523 m2 / kg. With the increase of the ratio of water to material and the amount of aluminum powder paste, the dry density and compressive strength of block decreased, and the water absorption increased. The compressive strength increases with the increase of cement content, but the increase of strength is not obvious. The aerated block with a better proportion has a dry density of 622kg / m ~ (3), a water absorption of 59.5% and a compressive strength of 4.2 MPA, which meets the standard requirement of B06 grade block. By adjusting the ratio of water to material, the amount of aluminum powder paste and the content of cement, the aerated block with optimized mix ratio is obtained. The dry density is 684 kg / m ~ (3), the water absorption is 55.2% and the compressive strength is 5.4 MPA, which meets the standard requirement of B07 grade aerated block. The influence of air entraining agent, quicklime and gypsum on the properties of block is obtained by single factor experiment. The optimum blending ratio of block is obtained by determining the optimum amount of air entraining agent, quicklime and gypsum. That is, the ratio of water to material is 0.475, the amount of aluminum powder paste 0.1 wts, the cement content 21wtth, the granitic rock powder 59wtt, the air entraining agent 0.1wtand, the quicklime 12wtand the gypsum 5wt3wt, the dry density of block 818 / kgm3, the water absorption 48.5and the compressive strength 8.6MPa, meeting the standard requirements of B08 grade aerated block. Based on the linear fitting equation between thermal conductivity and dry density, it is obtained that the thermal conductivity of B06 / B07 / B08 aerated block is 0.16 / 0.17 / 0.20 W / L / K ~ (-1) respectively, which meets the requirements of the national standard. The types, structure and morphology of hydration products of granitic powder aerated blocks were studied by means of XRD and SEM. The hydration products were mainly composed of various forms of Tobromolite C-S-H gel, calcium silicate hydrate and unreacted quartz particles. The macro-holes in the block are mutually independent and disconnected, and the aperture is about between 1.5-3mm. The micropores are formed by the cross-linking of hydration products with pore size of about 1 渭 m ~ 3 渭 m.
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU522.3

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