本文選題：納米粘土 + 粘結性能��； 參考：《大連海事大學》2015年碩士論文

【摘要】：氯鹽環(huán)境中富含氯離子,氯離子滲入混凝土內部,造成鋼筋銹蝕,導致鋼筋與混凝土間的粘結性能退化,致使鋼筋混凝土結構損傷、破壞,影響其承載力及耐久性,甚至引發(fā)工程事故。如何防止氯鹽環(huán)境下混凝土中鋼筋銹蝕,提高鋼筋混凝土結構耐久性及使用壽命,已成為當今世界關注的焦點問題。納米粘土材料能夠改變水泥基材料的物理力學性能,為研制新型高耐久性混凝土材料開辟了新思路�？v觀國內外有關氯鹽環(huán)境下鋼筋與混凝土粘結性能的研究現(xiàn)狀,在國家自然科學基金(項目編號：51178069)和教育部新世紀優(yōu)秀人才基金(項目編號：NCET-11-0860)的資助下,本文對納米粘土混凝土與銹蝕鋼筋間的粘結性能開展了試驗研究。主要研究內容如下：(1) 納米粘土混凝土氯離子滲透性能研究。利用恒電壓下電化學加速腐蝕試驗,在實驗室內完成了四種納米粘土摻量下60個試件的滲透試驗。研究了不同摻量納米粘土對混凝土滲透深度及混凝土內部氯離子濃度的影響規(guī)律。(2)納米粘土混凝土內部鋼筋銹蝕長期監(jiān)測研究。采用實驗室自然浸泡法,對不同摻量下納米粘土鋼筋混凝土試件進行長期浸泡,監(jiān)測試件內鋼筋銹蝕的變化情況。(3) 鋼筋與納米粘土混凝土粘結性能研究。完成了96個標準圓柱體試件的拉拔試驗,探討了納米粘土摻量及腐蝕時間對鋼筋與納米粘土混凝土粘結性能及混凝土內部鋼筋銹蝕情況的影響,得到了不同摻量下鋼筋與納米粘土混凝土的粘結-滑移曲線、極限粘結強度。(4) 納米粘土混凝土與鋼筋粘結性能的數(shù)值模擬分析。對拉拔試驗結果進行數(shù)值模擬,探討了不同摻量納米粘土對鋼筋混凝土構件粘結性能的影響,給出了有限元分析時需考慮鋼筋與混凝土之間粘結滑移的建議。
[Abstract]:Chloride salt environment is rich in chloride ions. Chloride ions infiltrate into the concrete, causing corrosion of steel bar, degradation of bond property between reinforcement and concrete, damage and damage of reinforced concrete structure, affecting its bearing capacity and durability. Even caused engineering accidents. How to prevent the corrosion of steel bars in concrete under chloride environment and improve the durability and service life of reinforced concrete structures have become the focus of attention in the world. Nano-clay materials can change the physical and mechanical properties of cement-based materials and open a new way for the development of new high durability concrete materials. The present situation of research on bond properties of reinforcement and concrete in chloride environment at home and abroad is reviewed. Supported by the National Natural Science Foundation (project No.: 51178069) and the Ministry of Education New Century Talent Fund (Project No.: NCET-11-0860), In this paper, the bond behavior between nano clay concrete and corroded steel bar is studied experimentally. The main research contents are as follows: 1) the chloride ion permeability of nano-clay concrete. By means of electrochemical accelerated corrosion test at constant voltage, the permeation tests of 60 specimens with four kinds of nano-clay were carried out in the laboratory. The effect of different amount of nano-clay on the penetration depth of concrete and the concentration of chloride ions in concrete is studied. The long-term monitoring of steel bar corrosion in nanocrystalline clay concrete is studied. By using the natural immersion method in laboratory, the specimens of nano-clay reinforced concrete with different contents were soaking for a long time, and the change of corrosion of steel bars in the specimens was monitored. 3) the bond property between steel bar and nano-clay concrete was studied. The drawing tests of 96 standard cylindrical specimens were completed, and the effects of nano-clay content and corrosion time on the bond properties of steel bar and nano-clay concrete and the corrosion of steel bar inside concrete were discussed. The bond-slip curve and ultimate bond strength of reinforced and nano-clay concrete with different contents are obtained. The numerical simulation of bond behavior between nano-clay concrete and steel bar is obtained. In this paper, the numerical simulation of the results of drawing test is carried out, and the influence of different amount of nano-clay on the bond behavior of reinforced concrete members is discussed, and the suggestion that the bond-slip between steel bar and concrete should be considered in finite element analysis is given.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU528

【參考文獻】

相關期刊論文 前6條

1 孟濤;錢匡亮;錢曉倩;詹樹林;;納米碳酸鈣顆粒對水泥水化性能和界面性質的影響[J];稀有金屬材料與工程;2008年S2期

2 胡秉偃;邢鋒;趙羽習;金偉良;;銹蝕鋼筋與混凝土的環(huán)向粘結試驗研究[J];工業(yè)建筑;2011年05期

3 李梅;溫勇;張廣泰;唐巍;董海蛟;;礦物摻合料對混凝土抗氯離子滲透性的影響綜述[J];材料導報;2013年11期

4 李九蘇;;除冰鹽破壞的水泥混凝土路面再生利用研究綜述[J];混凝土;2009年06期

5 趙羽習,金偉良;鋼筋與混凝土粘結本構關系的試驗研究[J];建筑結構學報;2002年01期

6 王依群;王福智;;鋼筋與混凝土間的黏結滑移在ANSYS中的模擬[J];天津大學學報;2006年02期

相關碩士學位論文 前1條

1 胡文斌;鈷納米磁性材料的合成及性能研究[D];合肥工業(yè)大學;2009年

，

本文編號：1842812