【摘要】：隨著我國對能源需求的不斷增長，能源問題已經(jīng)成為我國所面臨的重大考驗之一。為了保護(hù)有限的能源資源，我國的能源建設(shè)已逐漸從開發(fā)向節(jié)約的發(fā)展方向轉(zhuǎn)移。建筑節(jié)能作為能源節(jié)約的重點領(lǐng)域，已成為各國研究者們的研究重點。為響應(yīng)國家能源節(jié)約建設(shè)的號召，長沙理工大學(xué)提出了一種鋼筋混凝土剪力墻復(fù)合加氣混凝土砌塊自保溫體系，本文主要負(fù)責(zé)該體系的抗凍性研究。 對加氣混凝土復(fù)合墻體的抗凍性研究必須以加氣混凝土的抗凍性研究為基礎(chǔ)。目前，國內(nèi)外對蒸壓加氣混凝土抗凍性能的研究還較少。因此，本文對完善加氣混凝土抗凍性研究和推廣加氣混凝土復(fù)合墻體保溫體系具有重要意義。 研究和分析表明，孔結(jié)構(gòu)是影響材料抗凍性能的主要因素，而材料的吸水特性可以粗略的反應(yīng)其孔結(jié)構(gòu)。本文在研究加氣混凝土材料吸水特性與孔結(jié)構(gòu)的關(guān)系時引用了吸水動力學(xué)的基本原理，并通過3組15塊試件的吸水試驗后得到的吸水曲線圖總結(jié)了孔結(jié)構(gòu)與吸水特性的關(guān)系。 在研究孔結(jié)構(gòu)與抗凍性能的關(guān)系時通過對參考文獻(xiàn)的總結(jié)和分析，，將加氣混凝土內(nèi)的孔隙按照孔徑和對抗凍性能的影響的不同劃分為有害孔與無害孔，并與材料的吸水特性相結(jié)合，通過4組60塊加氣混凝土試件的凍融循環(huán)試驗提出了以加氣混凝土的吸水特性來表征其抗凍性能的方法，同時，基于這一方法提出了加氣混凝土抗凍性指標(biāo)，并根據(jù)不同地區(qū)抗凍等級的要求，得到不同地區(qū)的抗凍性指標(biāo)和強(qiáng)度的限值。 對復(fù)合墻體粘結(jié)面抗凍性能的研究采用了雙剪試驗法和劈拉試驗法。通過40塊雙剪及劈拉試件的凍融循環(huán)試驗結(jié)果表明，雙剪試驗無法較好的反應(yīng)粘結(jié)性能；而在劈拉試驗中發(fā)現(xiàn)，凍融作用會使粘結(jié)面的抗拉強(qiáng)度大幅下降。
[Abstract]:With the increasing demand for energy in China, energy problem has become one of the major challenges facing our country. In order to protect the limited energy resources, the energy construction in our country has gradually transferred from development to saving. As a key area of energy conservation, building energy conservation has become the research focus of researchers all over the world. In order to respond to the call of national energy conservation construction, a reinforced concrete shear wall composite aerated concrete block self-insulation system is proposed in Changsha University of Technology. This paper is mainly responsible for the study of the frost resistance of the system. The study of frost resistance of aerated concrete composite wall must be based on the study of frost resistance of aerated concrete. At present, there are few researches on frost resistance of autoclaved aerated concrete at home and abroad. Therefore, this paper is of great significance to improve the frost resistance of aerated concrete and popularize the insulation system of aerated concrete composite wall. The research and analysis show that the pore structure is the main factor affecting the material's antifreeze property, and the water absorption property of the material can roughly reflect its pore structure. In this paper, the basic principle of water absorption dynamics is used in the study of the relationship between the water absorption characteristics and pore structure of aerated concrete materials, and the relationship between the pore structure and the water absorption characteristics is summarized through the water absorption curves obtained from the water absorption tests of 3 groups of 15 specimens. By summarizing and analyzing the relationship between pore structure and frost resistance, the pores in aerated concrete are divided into harmful pore and harmless pore according to the pore size and the influence on freezing resistance. Combined with the water absorption characteristics of the material, through the freeze-thaw cycle test of 60 pieces of aerated concrete, a method to characterize the frost resistance of the aerated concrete by its water absorption property is put forward, at the same time, the freezing resistance of the aerated concrete is characterized by the freezing and thawing cycle test of the aerated concrete. Based on this method, the frost resistance index of aerated concrete is put forward, and according to the requirements of frost resistance grade in different regions, the freezing resistance index and the limit value of strength are obtained in different areas. Double shear test method and split tensile test method are used to study the frost resistance of the bonding surface of composite wall. The results of freezing and thawing cycles of 40 double shear and split tensile specimens show that the double shear test is not able to improve the reaction bond performance, but in the split tensile test, the freezing and thawing effect can greatly decrease the tensile strength of the bonding surface.
【學(xué)位授予單位】：長沙理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU528

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李玉;何平;謝喜山;;后澆混凝土與磚砌體粘結(jié)面抗剪強(qiáng)度的試驗研究[J];四川建筑科學(xué)研究;2006年02期

2 陳樹人,柳梭哲,王久良;混凝土孔結(jié)構(gòu)對冰點的影響[J];低溫建筑技術(shù);2000年01期

3 顧天舒;謝連玉;陳革;;建筑節(jié)能與墻體保溫[J];工程力學(xué);2006年S2期

4 謝慧才,李庚英,熊光晶;新老混凝土界面粘結(jié)力形成機(jī)理[J];硅酸鹽通報;2003年03期

5 陳立軍,王永平,尹新生,張丹;混凝土孔徑尺寸對其抗?jié)B性的影響[J];硅酸鹽學(xué)報;2005年04期

6 郭凱;胡曙光;丁慶軍;;加氣混凝土宏觀孔分析簡化方法及驗證[J];功能材料;2012年20期

7 段紀(jì)成,趙霄龍;高性能混凝土凍融耐久性與孔結(jié)構(gòu)變化的關(guān)系[J];湖北工學(xué)院學(xué)報;2004年02期

8 吳中偉;;混凝土科學(xué)技術(shù)的反思[J];混凝土及加筋混凝土;1988年06期

9 劉軍;邢鋒;董必欽;馬紅巖;;混凝土的微觀孔結(jié)構(gòu)及對滲透性能的影響[J];混凝土;2009年02期

10 程紅強(qiáng),李平先,張雷順;新老混凝土粘結(jié)面抗凍性能試驗研究[J];河南科學(xué);2003年06期

相關(guān)博士學(xué)位論文 前1條

1 彭軍芝;蒸壓加氣混凝土中孔的形成、特征及對性能的影響研究[D];重慶大學(xué);2011年

相關(guān)碩士學(xué)位論文 前1條

1 劉瑋輝;再生混凝土多孔磚耐久性與磚的抗凍指標(biāo)試驗研究[D];長沙理工大學(xué);2012年

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