Article(id=1319973167947436889, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319973069423231598, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20230539, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1690300800000, receivedDateStr=2023-07-26, revisedDate=1697299200000, revisedDateStr=2023-10-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1792635727153, onlineDateStr=2026-10-22, pubDate=1716134400000, pubDateStr=2024-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792635727153, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792635727153, creator=13701087609, updateTime=1792635727153, updator=13701087609, issue=Issue{id=1319973069423231598, tenantId=1146029695717560320, journalId=1263187385517883426, year='2024', volume='52', issue='5', pageStart='1477', pageEnd='1788', issueExtLink='null', onlineDate='null', pubDate='1716134400000', pubDateStr='2024-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792635703664, creator='13701087609', updateTime=1792641791199, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319998602462741464, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319973069423231598, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319998602462741465, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319973069423231598, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1710, endPage=1721, ext={EN=ArticleExt(id=1319973168341701466, articleId=1319973167947436889, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Calcium Silicate Hydrate Gels - A Short Review, columnId=1263922772401635899, journalTitle=Journal of the Chinese Ceramic Society, columnName=Review, runingTitle=null, highlight=null, articleAbstract=

Portland cement is one of the basic building materials for economic development, with high frequency of use, large quantity and wide application range. Calcium silicate hydrate (C-S-H) gel is a main hydration product that affects the macroscopic properties of Portland cement-based materials, and it is important to clarify the relationship between its structure and performance for the improvement of cement industry. However, the C-S-H gel produced by hydration of cement-based materials is difficult to extract, and its composition, morphology and structure are affected by different factors, which further affects its application performance. Therefore, this review analyzed the relationship between the microstructure and performance of C-S-H gel, discussed its mechanism of action on cement hydration, and provided a reference for its large-scale preparation and application.

C-S-H gel is an amorphous substance, its structure and composition are generally complex and variable. The structure of C-S-H gel has a certain regularity. Some work proposed three related theoretical models. The first model is an atomic structure model, which can provide a theoretical basis for the differences in phase composition and tetrahedral structure, and lay a reference for the mechanism of adsorption performance. The second model is a nanostructure model, which can make a reasonable explanation for the morphological changes of C-S-H gel and provide a theoretical support for improving the seed effect. The third model is an intermediary structure model, which can provide a more profound and comprehensive understanding of its internal microstructure. These models are an important basis for understanding the characteristics of cement as well as a key to analyzing the microstructure of C-S-H gel and applying its characteristics.

The proposal and verification of the three models above usually rely on the research of single-phase C-S-H gel, and the hydration products of cement affect each other, so it is difficult to extract C-S-H gel from the hardened matrix alone. Therefore, some researchers usually use artificial methods to prepare and control the composition and structure of C-S-H gels, especially hydrothermal synthesis. Firstly, keeping the reaction temperature and time (i.e., 70 ℃ and 7 h), choosing a low Ca/Si ratio and adding Al3+ or Na+ can reduce the generation of impurities. Secondly, increasing the reaction temperature and time improves the degree of polymerization of hydration products, and changing the Ca/Si ratio and ion species within a certain range also affects the chain length. In addition, the temperature increases, the reaction time prolongs, and the C-S-H surface gradually changes from the loose state to the dense state as the Ca/Si ratio decreases in the presence of Mg2+. Therefore, the precise control of C-S-H gel structure and characteristics can be achieved via a reasonable selection of technical parameters and applied to improve cement strength, thus avoiding ion penetration and other fields.

More importantly, the effective regulation of C-S-H gel can further improve the performance in different fields. The fiber-like morphology can be synthesized by properly reducing the Ca/Si ratio, adding Mg2+, increasing the temperature and extending the time, and the seeding effect of C-S-H gel can be improved to the greatest extent. Meanwhile, increasing Ca/Si ratio, mixing K+ and Na+, reducing reaction temperature, and shortening reaction time can increase the adsorption on the surface and accelerate the curing effect of C-S-H gel.

Summary and prospects

As an important source of strength in cement-based materials, the structural characteristics of C-S-H gel in microscale can determine its macroscopic applications in different fields. This review represented the typical structures of C-S-H gel at different stages and introduced the inherent connection between structure and performance. The precise control of different C-S-H structure using hydrothermal synthesis was introduced, and the influence of synthesis factors on its composition, morphology, and structure was described. The basic research on the synthesis of C-S-H gel in relevant fields was summarized. This review summarized the relationship between the structure and performance of C-S-H gel as well as the exploration of the prospects for the engineering application of C-S-H gel. This review provided a theoretical reference for fully understanding the hydration mechanism of cement and developing high-performance, environmentally friendly building materials. At present, the research on the essence and mechanism of C-S-H gel is still relatively weak, and there are still many problems to be solved and further explored:

1. This review mainly summarized the influence of synthetic C-S-H gel doped with cement-based materials on the overall performance, but could not realize an integrated study of "structure-performance-application" of C-S-H gel. It is necessary to deeply analyze the influence of the structure and performance of cement hydrated C-S-H gel on the matrix, and further improve the growth regulation and performance application of C-S-H gel in cement concrete.

2. In the process of hydrothermal synthesis of C-S-H gel, the influence and law of key variables such as Ca/Si ratio, alkali ion, reaction time and temperature on the particle size are not determined yet. In the future, it is necessary to continuously debug the experimental environment and parameters to explore a relationship between the particle size and properties.

, authors=Piqi ZHAO, Qian SUN, Xinyue YANG, Lingchao LU, Xin CHENG, authorsList=Piqi ZHAO, Qian SUN, Xinyue YANG, Lingchao LU, Xin CHENG, authorCompany=null, correspAuthors=Piqi ZHAO, authorNote=

ZHAO Piqi (1987-), male, Ph.D., Professor. E-mail:

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ZHAO Piqi (1987-), male, Ph.D., Professor. E-mail:
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水化硅酸钙(C-S-H)凝胶是影响水泥基胶凝材料宏观力学性能与长期耐久性的核心组分,阐明结构和性能间的关联关系有利于实现C-S-H凝胶的合成及推广应用。本文首先对C-S-H凝胶不同阶段的典型结构进行了综述,并引出结构与性能间的内在联系;随后,介绍水热合成法对不同结构C-S-H凝胶的精确调控,并详细阐述了合成要素对其组成、形貌以及结构的影响规律;最后,综述了合成C-S-H凝胶在相关应用领域的基础研究。本文聚焦于C-S-H凝胶构效关系的梳理总结以及C-S-H凝胶工程应用的前景探索,可为充分完善水泥水化机理、开发高性能绿色化建材提供理论参考。

, authors=赵丕琪, 孙乾, 杨新月, 芦令超, 程新, authorsList=赵丕琪, 孙乾, 杨新月, 芦令超, 程新, authorCompany=null, correspAuthors=赵丕琪, authorNote=

赵丕琪(1987—),男,博士,教授。

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赵丕琪(1987—),男,博士,教授。
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水化硅酸钙凝胶的研究进展
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赵丕琪 , 孙乾 , 杨新月 , 芦令超 , 程新
硅酸盐学报 | 综合评述 2024,52(5): 1710-1721
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硅酸盐学报 |综合评述 2024 , 52 (5) : 1710 -1721
水化硅酸钙凝胶的研究进展
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赵丕琪 , 孙乾, 杨新月, 芦令超, 程新
作者信息
  • 济南大学材料科学与工程学院,山东省建筑材料制备与测试技术重点实验室,济南 250022
通讯作者:
赵丕琪(1987—),男,博士,教授。
作者简介:

赵丕琪(1987—),男,博士,教授。

Calcium Silicate Hydrate Gels - A Short Review
Piqi ZHAO , Qian SUN, Xinyue YANG, Lingchao LU, Xin CHENG
Affiliations
  • Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, College of Materials Science and Engineering, University of Jinan, Jinan 250024, China
  • Corresponding Author:
    ZHAO Piqi (1987-), male, Ph.D., Professor. E-mail:

    ZHAO Piqi (1987-), male, Ph.D., Professor. E-mail:

出版时间: 2024-05-20 doi: 10.14062/j.issn.0454-5648.20230539
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水化硅酸钙(C-S-H)凝胶是影响水泥基胶凝材料宏观力学性能与长期耐久性的核心组分,阐明结构和性能间的关联关系有利于实现C-S-H凝胶的合成及推广应用。本文首先对C-S-H凝胶不同阶段的典型结构进行了综述,并引出结构与性能间的内在联系;随后,介绍水热合成法对不同结构C-S-H凝胶的精确调控,并详细阐述了合成要素对其组成、形貌以及结构的影响规律;最后,综述了合成C-S-H凝胶在相关应用领域的基础研究。本文聚焦于C-S-H凝胶构效关系的梳理总结以及C-S-H凝胶工程应用的前景探索,可为充分完善水泥水化机理、开发高性能绿色化建材提供理论参考。

水化硅酸钙  /  水热合成法  /  绿色建材  /  凝胶材料

Portland cement is one of the basic building materials for economic development, with high frequency of use, large quantity and wide application range. Calcium silicate hydrate (C-S-H) gel is a main hydration product that affects the macroscopic properties of Portland cement-based materials, and it is important to clarify the relationship between its structure and performance for the improvement of cement industry. However, the C-S-H gel produced by hydration of cement-based materials is difficult to extract, and its composition, morphology and structure are affected by different factors, which further affects its application performance. Therefore, this review analyzed the relationship between the microstructure and performance of C-S-H gel, discussed its mechanism of action on cement hydration, and provided a reference for its large-scale preparation and application.

C-S-H gel is an amorphous substance, its structure and composition are generally complex and variable. The structure of C-S-H gel has a certain regularity. Some work proposed three related theoretical models. The first model is an atomic structure model, which can provide a theoretical basis for the differences in phase composition and tetrahedral structure, and lay a reference for the mechanism of adsorption performance. The second model is a nanostructure model, which can make a reasonable explanation for the morphological changes of C-S-H gel and provide a theoretical support for improving the seed effect. The third model is an intermediary structure model, which can provide a more profound and comprehensive understanding of its internal microstructure. These models are an important basis for understanding the characteristics of cement as well as a key to analyzing the microstructure of C-S-H gel and applying its characteristics.

The proposal and verification of the three models above usually rely on the research of single-phase C-S-H gel, and the hydration products of cement affect each other, so it is difficult to extract C-S-H gel from the hardened matrix alone. Therefore, some researchers usually use artificial methods to prepare and control the composition and structure of C-S-H gels, especially hydrothermal synthesis. Firstly, keeping the reaction temperature and time (i.e., 70 ℃ and 7 h), choosing a low Ca/Si ratio and adding Al3+ or Na+ can reduce the generation of impurities. Secondly, increasing the reaction temperature and time improves the degree of polymerization of hydration products, and changing the Ca/Si ratio and ion species within a certain range also affects the chain length. In addition, the temperature increases, the reaction time prolongs, and the C-S-H surface gradually changes from the loose state to the dense state as the Ca/Si ratio decreases in the presence of Mg2+. Therefore, the precise control of C-S-H gel structure and characteristics can be achieved via a reasonable selection of technical parameters and applied to improve cement strength, thus avoiding ion penetration and other fields.

More importantly, the effective regulation of C-S-H gel can further improve the performance in different fields. The fiber-like morphology can be synthesized by properly reducing the Ca/Si ratio, adding Mg2+, increasing the temperature and extending the time, and the seeding effect of C-S-H gel can be improved to the greatest extent. Meanwhile, increasing Ca/Si ratio, mixing K+ and Na+, reducing reaction temperature, and shortening reaction time can increase the adsorption on the surface and accelerate the curing effect of C-S-H gel.

Summary and prospects

As an important source of strength in cement-based materials, the structural characteristics of C-S-H gel in microscale can determine its macroscopic applications in different fields. This review represented the typical structures of C-S-H gel at different stages and introduced the inherent connection between structure and performance. The precise control of different C-S-H structure using hydrothermal synthesis was introduced, and the influence of synthesis factors on its composition, morphology, and structure was described. The basic research on the synthesis of C-S-H gel in relevant fields was summarized. This review summarized the relationship between the structure and performance of C-S-H gel as well as the exploration of the prospects for the engineering application of C-S-H gel. This review provided a theoretical reference for fully understanding the hydration mechanism of cement and developing high-performance, environmentally friendly building materials. At present, the research on the essence and mechanism of C-S-H gel is still relatively weak, and there are still many problems to be solved and further explored:

1. This review mainly summarized the influence of synthetic C-S-H gel doped with cement-based materials on the overall performance, but could not realize an integrated study of "structure-performance-application" of C-S-H gel. It is necessary to deeply analyze the influence of the structure and performance of cement hydrated C-S-H gel on the matrix, and further improve the growth regulation and performance application of C-S-H gel in cement concrete.

2. In the process of hydrothermal synthesis of C-S-H gel, the influence and law of key variables such as Ca/Si ratio, alkali ion, reaction time and temperature on the particle size are not determined yet. In the future, it is necessary to continuously debug the experimental environment and parameters to explore a relationship between the particle size and properties.

hydrated calcium silicate  /  hydrothermal synthesis  /  environmentally friendly building materials  /  gel material
赵丕琪, 孙乾, 杨新月, 芦令超, 程新. 水化硅酸钙凝胶的研究进展. 硅酸盐学报, 2024 , 52 (5) : 1710 -1721 . DOI: 10.14062/j.issn.0454-5648.20230539
Piqi ZHAO, Qian SUN, Xinyue YANG, Lingchao LU, Xin CHENG. Calcium Silicate Hydrate Gels - A Short Review[J]. Journal of the Chinese Ceramic Society, 2024 , 52 (5) : 1710 -1721 . DOI: 10.14062/j.issn.0454-5648.20230539
  • 国家自然科学基金(52172021; U22A20126; 71874069)
  • 国家重点研发计划(2021YFB3802002)
  • 山东省优秀青年基金(ZR2023YQ041)
  • 山东省自然科学基金(ZR2021ME123)
  • 泰山学者青年专家计划
  • 济南市“一事一议”顶尖人才项目
  • 山东省高校青年创新支持计划(2019KJA017)
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doi: 10.14062/j.issn.0454-5648.20230539
  • 接收时间:2023-07-26
  • 首发时间:2026-10-22
  • 出版时间:2024-05-20
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  • 收稿日期:2023-07-26
  • 修回日期:2023-10-15
基金
国家自然科学基金(52172021; U22A20126; 71874069)
国家重点研发计划(2021YFB3802002)
山东省优秀青年基金(ZR2023YQ041)
山东省自然科学基金(ZR2021ME123)
泰山学者青年专家计划
济南市“一事一议”顶尖人才项目
山东省高校青年创新支持计划(2019KJA017)
作者信息
    济南大学材料科学与工程学院,山东省建筑材料制备与测试技术重点实验室,济南 250022

通讯作者:

赵丕琪(1987—),男,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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