發(fā)布時間：2018-02-05 23:49

  本文關鍵詞： 玻化微珠 保溫砂漿 人工碳化 碳酸鈣　出處：《重慶大學》2014年碩士論文　論文類型：學位論文

【摘要】：�；⒅楸厣皾{的體積吸水率遠低于珍珠巖保溫砂漿，耐火性遠高于聚苯乙烯顆粒保溫砂漿，其產(chǎn)品的抗壓強度相對較高，導熱率也相對較低，因而迅速占領了市場。普通的�；⒅楸厣皾{在外墻外保溫的施工過程中，由于產(chǎn)品質(zhì)量的參差不齊，操作的不規(guī)范，現(xiàn)場難以監(jiān)管，導致新建建筑的節(jié)能效果不夠理想，因而在重慶、北京等城市已被禁止使用。鑒于此，我們在普通�；⒅楸厣皾{的基礎上摻入18～20%的石灰對其進行改性研究，并為制成水泥鈣基�；⒅楸厣皾{復合板制品提供參考。 通過成型養(yǎng)護試驗，確定了攪拌時間、用水量、養(yǎng)護條件對水泥鈣基�；⒅楸厣皾{性能的影響；通過正交試驗，確定初步的配合比，進一步通過單因素試驗優(yōu)化分析，確定120kg/m3�；⒅榈挠昧吭�44.8%，使用120kg/m3�；⒅榇_定水泥的最佳用量（不包括粉煤灰的用量）為30%～34%，，粉煤灰或漂珠等量取代水泥的最優(yōu)摻量為10%，憎水劑摻量可選用0.1%，乳膠粉的摻量為1.8～2.0%，羥丙基甲基纖維素醚的最佳摻量為0.2%，聚丙烯纖維的最佳用量為0.4%，聚苯顆粒取代�；⒅榈淖罴延昧繛�3%；最后以此優(yōu)化后的配合比成型水泥鈣基�；⒅楸厣皾{試塊，并對其進行干密度、抗壓強度、保溫隔熱性、收縮性、抗裂性、耐火性的試驗分析。 本文采用人工碳化試驗，分析摻入18～20%的石灰對水泥鈣基�；⒅楸厣皾{的特殊影響與作用。經(jīng)過初步碳化試驗后，采用掃描電子顯微鏡對試塊進行微觀形貌掃描，發(fā)現(xiàn)要利用氫氧化鈣的碳化生成碳酸鈣晶體來提高水泥鈣基�；⒅楸厣皾{的致密度和強度，必須控制二氧化碳的濃度；通過不斷改變試塊碳化時二氧化碳的濃度，發(fā)現(xiàn)低二氧化碳濃度有利于生長的碳酸鈣晶體被水泥水化產(chǎn)物包裹從而促使水泥鈣基�；⒅楸厣皾{結構致密化，最終確定有利的二氧化碳濃度為20000PPM；再通過XRD、EDS能譜分析，確定水泥鈣基�；⒅楸厣皾{碳化后生成了大量的碳酸鈣晶體，這些碳酸鈣晶體在水泥鈣基�；⒅楸厣皾{的毛細孔中沉積，使得毛細孔細化，有利于后期強度的顯著增長。
[Abstract]:The volume water absorption rate of glass microbead insulation mortar is far lower than that of perlite insulation mortar, and the fire resistance is much higher than that of polystyrene particle insulation mortar. The compressive strength of the product is relatively high and the thermal conductivity is relatively low. As a result, it quickly occupied the market. Ordinary glass microbead insulation mortar in the construction process of external insulation, because the product quality is uneven, the operation is not standard, the site is difficult to supervise. As a result, the energy efficiency of new buildings is not ideal, so cities such as Chongqing and Beijing have been banned from use. On the basis of ordinary vitrified microbead insulation mortar, 1820% lime was added to modify the mortar, and a reference was provided for the preparation of cement calcium based glass microbead thermal insulation mortar composite board. The effects of mixing time, water consumption and curing conditions on the properties of cement calcium based vitrified microbeads thermal insulation mortar were determined by forming and curing test. Through the orthogonal test, the initial mix ratio was determined, and the amount of vitrified beads of 120kg / m3 was determined to be 44.8% by further optimization analysis of single factor test. The optimum dosage of cement (excluding fly ash) was determined by using 120 kg / m ~ 3 glass microbeads. The optimum amount of cement replaced by fly ash or drifter was 10%. The dosage of hydrophobic agent is 0.1, the content of latex powder is 1.80.The optimum dosage of hydroxypropyl methyl cellulose ether is 0.2, and the optimum dosage of polypropylene fiber is 0.4%. The optimum dosage of polystyrene particles to replace glass beads is 3. Finally, the optimized mix ratio is used to form the cement calcium based vitrified microbead insulation mortar, and the dry density, compressive strength, thermal insulation, shrinkage, crack resistance and fire resistance of the mortar are analyzed. In this paper, artificial carbonization test was used to analyze the special effect and effect of 18 ~ 20% lime on cement calcium based vitrified microbead thermal insulation mortar. Scanning electron microscope (SEM) was used to scan the microstructure of the samples, and it was found that calcium carbonate crystals should be formed by carbonation of calcium hydroxide to improve the density and strength of cement calcium based vitrified microbeads thermal insulation mortar. The concentration of carbon dioxide must be controlled; By changing the concentration of carbon dioxide during carbonization, it was found that the calcium carbonate crystals with low carbon dioxide concentration were encapsulated by the hydration products of cement, thus promoting the structure densification of cement calcium based glass microbeads thermal insulation mortar. The beneficial carbon dioxide concentration was determined to be 20 000 PPMs; Through the energy spectrum analysis of XRDX EDS, it was determined that a large number of calcium carbonate crystals were formed after carbonization of cement calcium based glass bead heat preservation mortar. These calcium carbonate crystals are deposited in the capillary pores of the cement calcium based vitrified microbeads, which make the capillary pores fine, which is conducive to the significant increase of the later strength.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU551;TU578.1

【參考文獻】

相關期刊論文 前10條

1 林秀華;;粉煤灰對混凝土收縮性能的影響與控制研究[J];福建建筑;2009年05期

2 鄭群圣;;夏熱冬冷地區(qū)�；⒅楸厣皾{的試驗研究與工程應用[J];工程質(zhì)量;2011年07期

3 陳曉莉;呂淵;;玻化微珠保溫砂漿配合比的正交試驗研究[J];混凝土與水泥制品;2012年02期

4 方明暉;朱蓬萊;黃珍珍;錢曉倩;;無機輕集料保溫砂漿材料組成對性能影響的研究[J];化學建材;2008年06期

5 張澤平;王亞杰;李珠;樊麗軍;董彥莉;;�；⒅楸厣皾{保溫系統(tǒng)技術經(jīng)濟分析[J];建筑經(jīng)濟;2007年S1期

6 喬翼;李珠;郭彩紅;;淺談�；⒅楸厣皾{的性能特點[J];科學之友;2012年06期

7 李大和;粉煤灰水化機理淺析[J];礦業(yè)研究與開發(fā);1999年05期

8 曾亮;黃少文;胡欣;羅琦;;�；⒅楸厣皾{的性能優(yōu)化[J];南昌大學學報(工科版);2008年04期

9 楊毅;;闡述建筑設計與建筑節(jié)能[J];門窗;2013年02期

10 周曉龍;;夏熱冬冷地區(qū)�；⒅楸厣皾{的配制[J];墻材革新與建筑節(jié)能;2010年06期

本文編號：1493075