Article(id=1322608988978524938, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322608967147172356, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20190261, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1557331200000, receivedDateStr=2019-05-09, revisedDate=1560182400000, revisedDateStr=2019-06-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1793264155858, onlineDateStr=2026-10-29, pubDate=1582128000000, pubDateStr=2020-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793264155858, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793264155858, creator=13701087609, updateTime=1793264155858, updator=13701087609, issue=Issue{id=1322608967147172356, tenantId=1146029695717560320, journalId=1263187385517883426, year='2020', volume='48', issue='2', pageStart='147', pageEnd='324', issueExtLink='null', onlineDate='null', pubDate='1582128000000', pubDateStr='2020-02-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793264150653, creator='13701087609', updateTime=1793276939599, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322662607933255748, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322608967147172356, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322662607933255749, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322608967147172356, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=237, endPage=245, ext={EN=ArticleExt(id=1322608991012762380, articleId=1322608988978524938, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Properties of Concrete Modified by Nano-Metakaolin Under Coupled Effect of Salt Lake Brine and Dry-Wet Cycles, columnId=null, journalTitle=Journal of the Chinese Ceramic Society, columnName=null, runingTitle=null, highlight=null, articleAbstract=

The influence of nano-metakaolin on the compressive strength of concrete under the coupled effect of Salt Lake brine and dry-wet cycles was investigated, and the mechanism was analyzed by mercury intrusion analysis, X-ray diffraction, infrared spectroscopy, scanning electron microscopy and energy dispersive spectroscpy. The results show that the proportion of nano-metakaolin has a great effect on the compressive strength of concrete under dry-wet cycles, and more than 2% nano-metakaolin decreases the loss rate of compressive strength. The modification mechanism is since nano-metakaolin reduces the proportion of harmful holes in concrete, improves the pore size distribution and makes the microstructure of concrete more compact. The erosion depth and intrusion amount of Cl, Na, Mg and S ions in concrete are reduced due to the presence of nano-metakaolin, thus decreasing the content of NaCl in the corrosive layer of concrete and preventing the concentration of corrosion products such as Mg(OH)2, and CaSO4·2H2O. In consequence, the damage degree of concrete modified by nano-metakaolin with the coupled effect of brine and drying-wetting cycles decreases.

, authors=Huimei ZHU, Qiqng SONG, Jun ZHANG, authorsList=Huimei ZHU, Qiqng SONG, Jun ZHANG, authorCompany=null, correspAuthors=null, authorNote=

ZHU Huimei (1986-), female, Ph.D., Letcturer. E-mail:

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研究了盐湖卤水与干湿循环耦合作用下,纳米偏高岭土对混凝土抗压强度的影响,并利用X射线衍射、红外光谱、压汞实验和扫描电子显微镜-能谱分析对其影响机理进行分析。结果表明:纳米偏高岭土掺量对混凝土盐卤-干湿循环后的抗压强度演变规律影响很大,超过2%的纳米偏高岭土可显著降低混凝土经盐卤-干湿循环后的抗压强度损失率,改善混凝土应用于大温差盐湖地区时的性能。改性机理可归纳为纳米偏高岭土降低了混凝土中的有害孔比例,明显改善了孔径分布,使其原始微观结构更加密实;减小了混凝土中Cl、Na、Mg和S等离子的侵蚀深度和侵入量,进而减轻盐卤溶液中NaCl等盐在混凝土中结晶膨胀产生的物理破坏,减少Mg(OH)2和CaSO4·2H2O等化学腐蚀产物的富集;从而使得混凝土经盐卤-干湿循环后的结构破坏程度明显降低。

, authors=朱绘美, 宋强, 张军, authorsList=朱绘美, 宋强, 张军, authorCompany=null, correspAuthors=null, authorNote=

朱绘美(1986—),女,博士,讲师。

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ZHU Huimei (1986-), female, Ph.D., Letcturer. E-mail:

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朱绘美(1986—),女,博士,讲师。

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朱绘美(1986—),女,博士,讲师。

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盐卤-干湿循环耦合作用下纳米偏高岭土改性混凝土的性能
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朱绘美 , 宋强 , 张军
硅酸盐学报 | 2020,48(2): 237-245
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硅酸盐学报 | 2020 , 48 (2) : 237 -245
盐卤-干湿循环耦合作用下纳米偏高岭土改性混凝土的性能
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朱绘美 , 宋强, 张军
作者信息
  • 西安建筑科技大学材料科学与工程学院,西安 710055
作者简介:

朱绘美(1986—),女,博士,讲师。

Properties of Concrete Modified by Nano-Metakaolin Under Coupled Effect of Salt Lake Brine and Dry-Wet Cycles
Huimei ZHU , Qiqng SONG, Jun ZHANG
Affiliations
  • College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
  • ZHU Huimei (1986-), female, Ph.D., Letcturer. E-mail:

出版时间: 2020-02-20 doi: 10.14062/j.issn.0454-5648.20190261
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研究了盐湖卤水与干湿循环耦合作用下,纳米偏高岭土对混凝土抗压强度的影响,并利用X射线衍射、红外光谱、压汞实验和扫描电子显微镜-能谱分析对其影响机理进行分析。结果表明:纳米偏高岭土掺量对混凝土盐卤-干湿循环后的抗压强度演变规律影响很大,超过2%的纳米偏高岭土可显著降低混凝土经盐卤-干湿循环后的抗压强度损失率,改善混凝土应用于大温差盐湖地区时的性能。改性机理可归纳为纳米偏高岭土降低了混凝土中的有害孔比例,明显改善了孔径分布,使其原始微观结构更加密实;减小了混凝土中Cl、Na、Mg和S等离子的侵蚀深度和侵入量,进而减轻盐卤溶液中NaCl等盐在混凝土中结晶膨胀产生的物理破坏,减少Mg(OH)2和CaSO4·2H2O等化学腐蚀产物的富集;从而使得混凝土经盐卤-干湿循环后的结构破坏程度明显降低。

纳米偏高岭土  /  混凝土  /  盐卤-干湿循环  /  强度  /  结构  /  耐久性

The influence of nano-metakaolin on the compressive strength of concrete under the coupled effect of Salt Lake brine and dry-wet cycles was investigated, and the mechanism was analyzed by mercury intrusion analysis, X-ray diffraction, infrared spectroscopy, scanning electron microscopy and energy dispersive spectroscpy. The results show that the proportion of nano-metakaolin has a great effect on the compressive strength of concrete under dry-wet cycles, and more than 2% nano-metakaolin decreases the loss rate of compressive strength. The modification mechanism is since nano-metakaolin reduces the proportion of harmful holes in concrete, improves the pore size distribution and makes the microstructure of concrete more compact. The erosion depth and intrusion amount of Cl, Na, Mg and S ions in concrete are reduced due to the presence of nano-metakaolin, thus decreasing the content of NaCl in the corrosive layer of concrete and preventing the concentration of corrosion products such as Mg(OH)2, and CaSO4·2H2O. In consequence, the damage degree of concrete modified by nano-metakaolin with the coupled effect of brine and drying-wetting cycles decreases.

nano-metakaolin  /  concrete  /  Salt Lake brine and dry-wet cycles  /  strength  /  structure  /  durability
朱绘美, 宋强, 张军. 盐卤-干湿循环耦合作用下纳米偏高岭土改性混凝土的性能. 硅酸盐学报, 2020 , 48 (2) : 237 -245 . DOI: 10.14062/j.issn.0454-5648.20190261
Huimei ZHU, Qiqng SONG, Jun ZHANG. Properties of Concrete Modified by Nano-Metakaolin Under Coupled Effect of Salt Lake Brine and Dry-Wet Cycles[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (2) : 237 -245 . DOI: 10.14062/j.issn.0454-5648.20190261
  • “十三五”国家重点研发计划项目(2017YFB0309903)
  • 陕西省自然科学基础研究计划项目(2017JQ5109)
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doi: 10.14062/j.issn.0454-5648.20190261
  • 接收时间:2019-05-09
  • 首发时间:2026-10-29
  • 出版时间:2020-02-20
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  • 收稿日期:2019-05-09
  • 修回日期:2019-06-11
基金
“十三五”国家重点研发计划项目(2017YFB0309903)
陕西省自然科学基础研究计划项目(2017JQ5109)
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    西安建筑科技大学材料科学与工程学院,西安 710055
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2种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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