Article(id=1318974627863450145, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1318974603884606018, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20221098, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1671897600000, receivedDateStr=2022-12-25, revisedDate=1675094400000, revisedDateStr=2023-01-31, acceptedDate=null, acceptedDateStr=null, onlineDate=1792397656646, onlineDateStr=2026-10-19, pubDate=1682611200000, pubDateStr=2023-04-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792397656646, onlineIssueDateStr=2026-10-19, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792397656646, creator=13701087609, updateTime=1792397656646, updator=13701087609, issue=Issue{id=1318974603884606018, tenantId=1146029695717560320, journalId=1263187385517883426, year='2023', volume='51', issue='8', pageStart='1883', pageEnd='2118', issueExtLink='null', onlineDate='null', pubDate='1692460800000', pubDateStr='2023-08-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792397650929, creator='13701087609', updateTime=1792399225992, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1318981210261541260, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1318974603884606018, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1318981210261541261, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1318974603884606018, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1950, endPage=1961, ext={EN=ArticleExt(id=1318974628064776738, articleId=1318974627863450145, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Prediction Model for Diffusivity of Unsaturated Concrete by Considering Time-Varying Pore Structure, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

As a typical porous media material, the diffusivities of concrete are closely related to its pore structure. It is necessary to propose a model for predicting the diffusivities based on the time-varying pore structure since the pore structure can continuously change with the hydration process. In this work, the parameters of the pore structure, the moisture distribution in the unsaturated state, and the prediction and validation of the relative diffusion coefficients of cement paste at different saturation levels were analyzed based on the reconstructed cement paste microstructure. It is indicated that the predicted relative diffusion coefficients are related to the extracted pore parameters (i.e., hydration degree α, porosity ρ and dimensionless peak pore size B*), and the relationships between α and time t, ρ and α, and B* and ρ were systematically analyzed, and a diffusivity prediction model containing the time-varying parameters f (α(t), ρ(t), B*(t)) was proposed. The proposed model can fully consider the time-varying process of concrete pore structure affected at different water-cement ratios and hydration time, thus providing a microscopic perspective approach for analyzing the diffusivities of unsaturated concrete from the perspective of time-varying pore structure.

, authors=Liangyu TONG1, Qingfeng LIU1, 2, authorsList=Liangyu TONG, Qingfeng LIU, authorCompany=null, correspAuthors=Qingfeng LIU, authorNote=

TONG Liangyu (1999-), female, Doctoral candidate. E-mail:

, correspAuthorsNote=
LIU Qingfeng (1986-), male, Ph.D., Professor. E-mail:
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混凝土作为典型的多孔介质材料,其扩散性能与内部孔隙结构密切相关。考虑到孔隙结构会随水泥水化过程不断变化,因此有必要提出一种基于时变孔隙结构的扩散性能预测模型。基于重构的水泥浆体微观结构,本研究开展了孔隙结构的参数化分析、非饱和状态水分分布模拟以及不同饱和度下浆体组分相对扩散系数的预测和验证。综合预测的相对扩散系数和提取的孔隙参数(水化程度α、孔隙率ρ和无量纲的峰值孔径B*),进一步系统分析了α与时间t、ρ与α以及B*与ρ相互间的关系,并最终建立了包含时变参数f(α(t), ρ(t), B*(t))的非饱和混凝土扩散性能预测模型。此模型可以充分考虑混凝土孔隙结构受不同水灰比和水化时间影响的时变过程,为从变化的孔隙结构角度研究非饱和混凝土的扩散性能提供了一个新的微观视角。

, authors=童良玉1, 刘清风1, 2, authorsList=童良玉, 刘清风, authorCompany=null, correspAuthors=刘清风, authorNote=

童良玉(1999—),女,博士研究生。

, correspAuthorsNote=
刘清风(1986—),博士,教授。
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TONG Liangyu (1999-), female, Doctoral candidate. E-mail:

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考虑时变孔隙结构的非饱和混凝土扩散性能预测模型
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童良玉 1 , 刘清风 1, 2
硅酸盐学报 | 研究论文 2023,51(8): 1950-1961
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硅酸盐学报 |研究论文 2023 , 51 (8) : 1950 -1961
考虑时变孔隙结构的非饱和混凝土扩散性能预测模型
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童良玉1 , 刘清风1, 2
作者信息
  • 1.上海交通大学海洋工程国家重点实验室,上海 200240
  • 2.上海市公共建筑和基础设施数字化运维重点实验室,上海 200240
通讯作者:
刘清风(1986—),博士,教授。
作者简介:

童良玉(1999—),女,博士研究生。

Prediction Model for Diffusivity of Unsaturated Concrete by Considering Time-Varying Pore Structure
Liangyu TONG1 , Qingfeng LIU1, 2
Affiliations
  • 1.State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 2.Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure, Shanghai 200240, China
  • Corresponding Author:
    LIU Qingfeng (1986-), male, Ph.D., Professor. E-mail:

    TONG Liangyu (1999-), female, Doctoral candidate. E-mail:

出版时间: 2023-04-28 doi: 10.14062/j.issn.0454-5648.20221098
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混凝土作为典型的多孔介质材料,其扩散性能与内部孔隙结构密切相关。考虑到孔隙结构会随水泥水化过程不断变化,因此有必要提出一种基于时变孔隙结构的扩散性能预测模型。基于重构的水泥浆体微观结构,本研究开展了孔隙结构的参数化分析、非饱和状态水分分布模拟以及不同饱和度下浆体组分相对扩散系数的预测和验证。综合预测的相对扩散系数和提取的孔隙参数(水化程度α、孔隙率ρ和无量纲的峰值孔径B*),进一步系统分析了α与时间t、ρ与α以及B*与ρ相互间的关系,并最终建立了包含时变参数f(α(t), ρ(t), B*(t))的非饱和混凝土扩散性能预测模型。此模型可以充分考虑混凝土孔隙结构受不同水灰比和水化时间影响的时变过程,为从变化的孔隙结构角度研究非饱和混凝土的扩散性能提供了一个新的微观视角。

混凝土  /  扩散性能  /  时变模型  /  孔隙结构  /  非饱和

As a typical porous media material, the diffusivities of concrete are closely related to its pore structure. It is necessary to propose a model for predicting the diffusivities based on the time-varying pore structure since the pore structure can continuously change with the hydration process. In this work, the parameters of the pore structure, the moisture distribution in the unsaturated state, and the prediction and validation of the relative diffusion coefficients of cement paste at different saturation levels were analyzed based on the reconstructed cement paste microstructure. It is indicated that the predicted relative diffusion coefficients are related to the extracted pore parameters (i.e., hydration degree α, porosity ρ and dimensionless peak pore size B*), and the relationships between α and time t, ρ and α, and B* and ρ were systematically analyzed, and a diffusivity prediction model containing the time-varying parameters f (α(t), ρ(t), B*(t)) was proposed. The proposed model can fully consider the time-varying process of concrete pore structure affected at different water-cement ratios and hydration time, thus providing a microscopic perspective approach for analyzing the diffusivities of unsaturated concrete from the perspective of time-varying pore structure.

concrete  /  diffusivity  /  time-varying model  /  pore structure  /  unsaturated
童良玉, 刘清风. 考虑时变孔隙结构的非饱和混凝土扩散性能预测模型. 硅酸盐学报, 2023 , 51 (8) : 1950 -1961 . DOI: 10.14062/j.issn.0454-5648.20221098
Liangyu TONG, Qingfeng LIU. Prediction Model for Diffusivity of Unsaturated Concrete by Considering Time-Varying Pore Structure[J]. Journal of the Chinese Ceramic Society, 2023 , 51 (8) : 1950 -1961 . DOI: 10.14062/j.issn.0454-5648.20221098
  • 国家优秀青年科学基金(52222805)
  • 重庆市自然科学基金资助项目(cstc2021jcyj-msxmX1103)
  • 上海交通大学深蓝计划
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2023年第51卷第8期
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doi: 10.14062/j.issn.0454-5648.20221098
  • 接收时间:2022-12-25
  • 首发时间:2026-10-19
  • 出版时间:2023-04-28
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  • 收稿日期:2022-12-25
  • 修回日期:2023-01-31
基金
国家优秀青年科学基金(52222805)
重庆市自然科学基金资助项目(cstc2021jcyj-msxmX1103)
上海交通大学深蓝计划
作者信息
    1.上海交通大学海洋工程国家重点实验室,上海 200240
    2.上海市公共建筑和基础设施数字化运维重点实验室,上海 200240

通讯作者:

刘清风(1986—),博士,教授。
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2种不同金属材料的力学参数
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Family
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Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
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种数
Number of
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Percentage of total
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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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