Article(id=1319222797067473439, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222668956643677, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20220777, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1663689600000, receivedDateStr=2022-09-21, revisedDate=1664812800000, revisedDateStr=2022-10-04, acceptedDate=null, acceptedDateStr=null, onlineDate=1792456824794, onlineDateStr=2026-10-20, pubDate=1684512000000, pubDateStr=2023-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792456824794, onlineIssueDateStr=2026-10-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792456824794, creator=13701087609, updateTime=1792456824794, updator=13701087609, issue=Issue{id=1319222668956643677, tenantId=1146029695717560320, journalId=1263187385517883426, year='2023', volume='51', issue='5', pageStart='1091', pageEnd='1372', issueExtLink='null', onlineDate='null', pubDate='1684512000000', pubDateStr='2023-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792456794251, creator='13701087609', updateTime=1792456976356, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319223432827490920, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222668956643677, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319223432827490921, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319222668956643677, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1302, endPage=1310, ext={EN=ArticleExt(id=1319222797260411424, articleId=1319222797067473439, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Water Absorption and Microstructure Deterioration of Cement Paste Under Freeze-Thaw Environment, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

The failure mechanism and damage form of unsaturated cement-based materials are rather different under freeze-thaw environment. In this paper, the water absorption characteristics of unsaturated cement paste at different freezing temperatures were investigated in four freeze-thaw cycle regimes, i.e. -10 ℃-4 ℃, -20 ℃-4 ℃, -30 ℃-4 ℃ and -40 ℃-4 ℃. The single surface immersed unsaturated cement paste was subjected to 23 freeze-thaw cycles at -40 ℃. The microstructures of the samples at different heights from the water surface were analyzed. The results show that the water absorption of unsaturated cement paste can increase with the increase of the number of freeze-thaw cycles. The lower the freezing temperature is, the greater the water absorption will be, indicating the greater cold absorption. After the same number of freeze-thaw cycles, the closer the site to the water surface is, the larger the porosity and the greater the volume fraction of microcracks will be. The smaller the content of small pores is, the larger the content of large pores will be, that is, the closer the site to the water surface is, the more serious the freeze-thaw damage will be.

, authors=Hongpan LI, Lin LIU, Yue WEI, authorsList=Hongpan LI, Lin LIU, Yue WEI, authorCompany=null, correspAuthors=Lin LIU, authorNote=

LI Hongpan (1999-), male, Master candidate. E-mail:

, correspAuthorsNote=
LIU Lin (1983-), female, Ph.D., Professor. E-mail:
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非饱和状态下混凝土的冻融破坏与饱和状态混凝土的破坏机理和损伤形态有着很大的不同。为了探究冻融环境下非饱和水泥基材料的吸水性能和微结构的劣化,设置了-10 ℃~4 ℃、-20 ℃~4 ℃、-30 ℃~4 ℃、-40 ℃~4 ℃ 4个冻融循环制度,探究非饱和水泥净浆在不同最低冰冻温度影响下的吸水特性,之后对单面浸水非饱和水泥净浆进行最低-40 ℃的冻融循环作用23次,并对距离水面不同高度处的试样进行微结构分析。结果表明:非饱和水泥净浆的吸水率随着冻融循环次数的增加而增大,冰冻温度越低,吸水率越大,表明冷吸作用越大;经历同样冻融循环次数后,距离水面越近的部位表现出孔隙率越大、微裂纹体积分数越大,其中小孔含量较少、大孔含量明显增大,即距离水面越近冻融损伤越严重。

, authors=李洪攀, 刘琳, 韦悦, authorsList=李洪攀, 刘琳, 韦悦, authorCompany=null, correspAuthors=刘琳, authorNote=

李洪攀(1999—),男,硕士研究生。

, correspAuthorsNote=
刘琳(1983—),女,博士,教授。
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李洪攀(1999—),男,硕士研究生。

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冻融环境下水泥净浆吸水性能和微结构劣化
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李洪攀 , 刘琳 , 韦悦
硅酸盐学报 | 研究论文 2023,51(5): 1302-1310
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硅酸盐学报 |研究论文 2023 , 51 (5) : 1302 -1310
冻融环境下水泥净浆吸水性能和微结构劣化
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李洪攀 , 刘琳 , 韦悦
作者信息
  • 河海大学土木与交通学院,南京 210098
通讯作者:
刘琳(1983—),女,博士,教授。
作者简介:

李洪攀(1999—),男,硕士研究生。

Water Absorption and Microstructure Deterioration of Cement Paste Under Freeze-Thaw Environment
Hongpan LI , Lin LIU , Yue WEI
Affiliations
  • College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
  • Corresponding Author:
    LIU Lin (1983-), female, Ph.D., Professor. E-mail:

    LI Hongpan (1999-), male, Master candidate. E-mail:

出版时间: 2023-05-20 doi: 10.14062/j.issn.0454-5648.20220777
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非饱和状态下混凝土的冻融破坏与饱和状态混凝土的破坏机理和损伤形态有着很大的不同。为了探究冻融环境下非饱和水泥基材料的吸水性能和微结构的劣化,设置了-10 ℃~4 ℃、-20 ℃~4 ℃、-30 ℃~4 ℃、-40 ℃~4 ℃ 4个冻融循环制度,探究非饱和水泥净浆在不同最低冰冻温度影响下的吸水特性,之后对单面浸水非饱和水泥净浆进行最低-40 ℃的冻融循环作用23次,并对距离水面不同高度处的试样进行微结构分析。结果表明:非饱和水泥净浆的吸水率随着冻融循环次数的增加而增大,冰冻温度越低,吸水率越大,表明冷吸作用越大;经历同样冻融循环次数后,距离水面越近的部位表现出孔隙率越大、微裂纹体积分数越大,其中小孔含量较少、大孔含量明显增大,即距离水面越近冻融损伤越严重。

非饱和水泥净浆  /  冻融循环  /  吸水性  /  微结构

The failure mechanism and damage form of unsaturated cement-based materials are rather different under freeze-thaw environment. In this paper, the water absorption characteristics of unsaturated cement paste at different freezing temperatures were investigated in four freeze-thaw cycle regimes, i.e. -10 ℃-4 ℃, -20 ℃-4 ℃, -30 ℃-4 ℃ and -40 ℃-4 ℃. The single surface immersed unsaturated cement paste was subjected to 23 freeze-thaw cycles at -40 ℃. The microstructures of the samples at different heights from the water surface were analyzed. The results show that the water absorption of unsaturated cement paste can increase with the increase of the number of freeze-thaw cycles. The lower the freezing temperature is, the greater the water absorption will be, indicating the greater cold absorption. After the same number of freeze-thaw cycles, the closer the site to the water surface is, the larger the porosity and the greater the volume fraction of microcracks will be. The smaller the content of small pores is, the larger the content of large pores will be, that is, the closer the site to the water surface is, the more serious the freeze-thaw damage will be.

unsaturated cement paste  /  freeze-thaw cycle  /  water absorption  /  microstructure
李洪攀, 刘琳, 韦悦. 冻融环境下水泥净浆吸水性能和微结构劣化. 硅酸盐学报, 2023 , 51 (5) : 1302 -1310 . DOI: 10.14062/j.issn.0454-5648.20220777
Hongpan LI, Lin LIU, Yue WEI. Water Absorption and Microstructure Deterioration of Cement Paste Under Freeze-Thaw Environment[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (5) : 1302 -1310 . DOI: 10.14062/j.issn.0454-5648.20220777
  • 国家自然科学基金项目(51978241)
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doi: 10.14062/j.issn.0454-5648.20220777
  • 接收时间:2022-09-21
  • 首发时间:2026-10-20
  • 出版时间:2023-05-20
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  • 收稿日期:2022-09-21
  • 修回日期:2022-10-04
基金
国家自然科学基金项目(51978241)
作者信息
    河海大学土木与交通学院,南京 210098

通讯作者:

刘琳(1983—),女,博士,教授。
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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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