本文主要研究内容
作者谭弘俊（2019）在《镁镍铝水滑石对水泥基材料固化氯离子性能影响》一文中研究指出：氯盐侵蚀环境下的钢筋混凝土耐久性问题一直得到广泛关注,外界环境的氯离子浸入是导致混凝土钢筋锈蚀的主要原因。本项目制备并研究一种新型水滑石类层状化合物用以吸附氯离子,应用于水泥基材料中提高其抗氯离子侵蚀性。本研究采用水热法制备了棒状MgNiAl-LDHs和MgAl-LDHs,比较了MgNiAl-LDHs和MgAl-LDHs的结构形貌、MgNiAl-LDHs和MgAl-LDHs及焙烧产物MgNiAl-LDOs和MgAl-LDOs在水溶液中对氯离子的吸附性能,探讨了不同的pH值、焙烧温度、吸附剂的用量、吸附温度、氯离子溶液浓度条件下MgNiAl-LDOs吸附氯离子的影响,通过氯离子外渗法研究了MgNiAl-LDOs在水泥基材料中固化氯离子能力,分析MgNiAl-LDOs在水泥基材料中固化氯离子的性能。实验结果表明:(1)采用水热法可制备棒状MgNiAl-LDHs和MgAl-LDHs。(2)MgNiAl-LDHs焙烧之后失去层间水和阴离子,层状结构被破坏,在水溶液中重新吸收阴离子之后经过结构重组可以恢复其层状结构,但重建后的结构完整性下降。(3)经过500℃焙烧的MgNiAl-LDHs在投加量为2.0g/L,pH值为8,吸附温度50℃条件下吸附性能最优,最大的平衡吸附量为130.02mg/g。(4)吸附动力学模型表明,MgNiAl-LDOs吸附氯离子过程符合准二级动力学方程;吸附等温线模型表明,吸附氯离子过程符合Langmuir吸附等温模型,理论最大吸附量为130.79mg/g。(5)氯离子浓度为1mol/L、氯盐侵蚀28d条件下,MgNiAl-LDOs替代40%水泥掺入到混凝土中的固化氯离子量为54.1mg/g。MgNiAl-LDOs在水泥基材料中固化氯离子量与侵蚀时间、氯离子浓度、MgNiAl-LDOs的替代量呈正相关。(6)掺入到水泥基材料中的MgNiAl-LDOs重建了水滑石的层状结构,并且形成了不规则的形状。以此研究为基础,推动更多更优新型水滑石类化合物的制备用于改善混凝土抗氯离子渗透性能。
Abstract
lv yan qin shi huan jing xia de gang jin hun ning tu nai jiu xing wen ti yi zhi de dao an fan guan zhu ,wai jie huan jing de lv li zi jin ru shi dao zhi hun ning tu gang jin xiu shi de zhu yao yuan yin 。ben xiang mu zhi bei bing yan jiu yi chong xin xing shui hua dan lei ceng zhuang hua ge wu yong yi xi fu lv li zi ,ying yong yu shui ni ji cai liao zhong di gao ji kang lv li zi qin shi xing 。ben yan jiu cai yong shui re fa zhi bei le bang zhuang MgNiAl-LDHshe MgAl-LDHs,bi jiao le MgNiAl-LDHshe MgAl-LDHsde jie gou xing mao 、MgNiAl-LDHshe MgAl-LDHsji bei shao chan wu MgNiAl-LDOshe MgAl-LDOszai shui rong ye zhong dui lv li zi de xi fu xing neng ,tan tao le bu tong de pHzhi 、bei shao wen du 、xi fu ji de yong liang 、xi fu wen du 、lv li zi rong ye nong du tiao jian xia MgNiAl-LDOsxi fu lv li zi de ying xiang ,tong guo lv li zi wai shen fa yan jiu le MgNiAl-LDOszai shui ni ji cai liao zhong gu hua lv li zi neng li ,fen xi MgNiAl-LDOszai shui ni ji cai liao zhong gu hua lv li zi de xing neng 。shi yan jie guo biao ming :(1)cai yong shui re fa ke zhi bei bang zhuang MgNiAl-LDHshe MgAl-LDHs。(2)MgNiAl-LDHsbei shao zhi hou shi qu ceng jian shui he yin li zi ,ceng zhuang jie gou bei po huai ,zai shui rong ye zhong chong xin xi shou yin li zi zhi hou jing guo jie gou chong zu ke yi hui fu ji ceng zhuang jie gou ,dan chong jian hou de jie gou wan zheng xing xia jiang 。(3)jing guo 500℃bei shao de MgNiAl-LDHszai tou jia liang wei 2.0g/L,pHzhi wei 8,xi fu wen du 50℃tiao jian xia xi fu xing neng zui you ,zui da de ping heng xi fu liang wei 130.02mg/g。(4)xi fu dong li xue mo xing biao ming ,MgNiAl-LDOsxi fu lv li zi guo cheng fu ge zhun er ji dong li xue fang cheng ;xi fu deng wen xian mo xing biao ming ,xi fu lv li zi guo cheng fu ge Langmuirxi fu deng wen mo xing ,li lun zui da xi fu liang wei 130.79mg/g。(5)lv li zi nong du wei 1mol/L、lv yan qin shi 28dtiao jian xia ,MgNiAl-LDOsti dai 40%shui ni can ru dao hun ning tu zhong de gu hua lv li zi liang wei 54.1mg/g。MgNiAl-LDOszai shui ni ji cai liao zhong gu hua lv li zi liang yu qin shi shi jian 、lv li zi nong du 、MgNiAl-LDOsde ti dai liang cheng zheng xiang guan 。(6)can ru dao shui ni ji cai liao zhong de MgNiAl-LDOschong jian le shui hua dan de ceng zhuang jie gou ,bing ju xing cheng le bu gui ze de xing zhuang 。yi ci yan jiu wei ji chu ,tui dong geng duo geng you xin xing shui hua dan lei hua ge wu de zhi bei yong yu gai shan hun ning tu kang lv li zi shen tou xing neng 。
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论文详细介绍
论文作者分别是来自南华大学的谭弘俊，发表于刊物南华大学2019-10-28论文，是一篇关于镁镍铝水滑石论文,固化论文,水泥基材料论文,氯离子论文,南华大学2019-10-28论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自南华大学2019-10-28论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：镁镍铝水滑石论文; 固化论文; 水泥基材料论文; 氯离子论文; 南华大学2019-10-28论文;