Article(id=1322636285345383415, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20200234, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1585584000000, receivedDateStr=2020-03-31, revisedDate=1587830400000, revisedDateStr=2020-04-26, acceptedDate=null, acceptedDateStr=null, onlineDate=1793270663820, onlineDateStr=2026-10-29, pubDate=1605801600000, pubDateStr=2020-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1793270663820, onlineIssueDateStr=2026-10-29, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1793270663820, creator=13701087609, updateTime=1793270663820, updator=13701087609, issue=Issue{id=1322636274364698818, tenantId=1146029695717560320, journalId=1263187385517883426, year='2020', volume='48', issue='11', pageStart='1689', pageEnd='1864', issueExtLink='null', onlineDate='null', pubDate='1605801600000', pubDateStr='2020-11-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1793270661202, creator='13701087609', updateTime=1793277186220, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1322663642319930111, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1322663642319930112, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1322636274364698818, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1689, endPage=1699, ext={EN=ArticleExt(id=1322636285576070136, articleId=1322636285345383415, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Influence of Silica Fume on Performance of High-Strength Geopolymer, columnId=1322636275505549507, journalTitle=Journal of the Chinese Ceramic Society, columnName=Special Issue for Ultra-high Performance Concrete Ⅱ, runingTitle=null, highlight=null, articleAbstract=

Slag, fly ash and silica fume were used as reactive aluminosilicate materials to prepare high-strength geopolymer. The influence of silica fume on the setting and hardening of geopolymer was particularly investigated based on the optimization of solid raw materials and activator compositions by a simplex centroid design method. The results show that silica fume can be used as a filler in the packing void between slag and fly ash particles, thus increasing the liquid film thickness due to the release of activator from the voids. This reduces the thixotropy of the paste as well as yield stress and plastic viscosity, thereby improving the flowability of geopolymer. A rapid dissolution of silica fume in a highly-alkaline activator increases the concentration of silicates and decreases alkalinity, leading to deceleration of the reactions of slag and fly ash and the formation of C-A-S-H gels with the prolongation of setting, the retardation of acceleration period, and the decrease of peak reaction heat rate and cumulative reaction heat. This affects the early reaction products and compressive strength development of geopolymer. The compressive strength of the resultant geopolymer reaches higher than 100 MPa with a good workability and reasonable setting time when slag content is more than 50%, fly ash is less than 30% and silica fume is less than 30%, indicating a possibility of producing geopolymer-based UHPC.

, authors=Yiwei LIU, Zuhua ZHANG, Caijun SHI, Ning LI, Long LEl, authorsList=Yiwei LIU, Zuhua ZHANG, Caijun SHI, Ning LI, Long LEl, authorCompany=null, correspAuthors=Zuhua ZHANG, authorNote=

LIU Yiwei (1993-), male, Doctorial candidate. E-mail:

, correspAuthorsNote=
ZHANG Zuhua (1983-), male, Ph.D., Professor. E-mail:
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以矿渣、粉煤灰和硅灰为原材料制备高强地聚物,利用单一质心设计法对原材料组成进行设计优化,研究了硅灰对凝结硬化过程以及对硬化浆体抗压强度的影响。结果表明:硅灰充分发挥了细颗粒作用,充填在矿渣和粉煤灰堆积空隙中,由此释放的激发剂提高了固体颗粒表面的液膜厚度,从而改善地聚物的流动性,降低浆体的触变性、屈服应力和塑性黏度;由于高活性,部分硅灰在强碱性溶液中快速溶解,使得激发剂中硅酸根离子浓度提高,碱度降低,从而使矿渣和粉煤灰的反应速率降低,减缓C—A—S—H凝胶形成,宏观上表现为凝结时间延长,加速期迟滞,反应热峰值和累计放热量降低,硬化体早期强度发展受到影响。当矿渣含量>50%、粉煤灰含量<30%且硅灰含量<30%时,地聚物砂浆强度超过100 MPa,满足新拌性能要求,具有制备超高性能混凝土的可行性。

, authors=刘翼玮, 张祖华, 史才军, 李宁, 雷龙, authorsList=刘翼玮, 张祖华, 史才军, 李宁, 雷龙, authorCompany=null, correspAuthors=张祖华, authorNote=

刘翼玮(1993—),男,博士研究生。

, correspAuthorsNote=
张祖华(1983—),男,博士,教授,博士研究生导师。
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硅灰对高强地聚物胶凝材料性能的影响
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刘翼玮 , 张祖华 , 史才军 , 李宁 , 雷龙
硅酸盐学报 | 超高性能混凝土专题Ⅱ 2020,48(11): 1689-1699
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硅酸盐学报 |超高性能混凝土专题Ⅱ 2020 , 48 (11) : 1689 -1699
硅灰对高强地聚物胶凝材料性能的影响
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刘翼玮 , 张祖华 , 史才军, 李宁, 雷龙
作者信息
  • 湖南大学土木工程学院,绿色先进土木工程材料及应用技术湖南省重点实验室,长沙 410082
通讯作者:
张祖华(1983—),男,博士,教授,博士研究生导师。
作者简介:

刘翼玮(1993—),男,博士研究生。

Influence of Silica Fume on Performance of High-Strength Geopolymer
Yiwei LIU , Zuhua ZHANG , Caijun SHI, Ning LI, Long LEl
Affiliations
  • Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China
  • Corresponding Author:
    ZHANG Zuhua (1983-), male, Ph.D., Professor. E-mail:

    LIU Yiwei (1993-), male, Doctorial candidate. E-mail:

出版时间: 2020-11-20 doi: 10.14062/j.issn.0454-5648.20200234
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以矿渣、粉煤灰和硅灰为原材料制备高强地聚物,利用单一质心设计法对原材料组成进行设计优化,研究了硅灰对凝结硬化过程以及对硬化浆体抗压强度的影响。结果表明:硅灰充分发挥了细颗粒作用,充填在矿渣和粉煤灰堆积空隙中,由此释放的激发剂提高了固体颗粒表面的液膜厚度,从而改善地聚物的流动性,降低浆体的触变性、屈服应力和塑性黏度;由于高活性,部分硅灰在强碱性溶液中快速溶解,使得激发剂中硅酸根离子浓度提高,碱度降低,从而使矿渣和粉煤灰的反应速率降低,减缓C—A—S—H凝胶形成,宏观上表现为凝结时间延长,加速期迟滞,反应热峰值和累计放热量降低,硬化体早期强度发展受到影响。当矿渣含量>50%、粉煤灰含量<30%且硅灰含量<30%时,地聚物砂浆强度超过100 MPa,满足新拌性能要求,具有制备超高性能混凝土的可行性。

超高性能混凝土  /  高强地聚物  /  硅灰  /  新拌性能  /  抗压强度  /  单一质心设计

Slag, fly ash and silica fume were used as reactive aluminosilicate materials to prepare high-strength geopolymer. The influence of silica fume on the setting and hardening of geopolymer was particularly investigated based on the optimization of solid raw materials and activator compositions by a simplex centroid design method. The results show that silica fume can be used as a filler in the packing void between slag and fly ash particles, thus increasing the liquid film thickness due to the release of activator from the voids. This reduces the thixotropy of the paste as well as yield stress and plastic viscosity, thereby improving the flowability of geopolymer. A rapid dissolution of silica fume in a highly-alkaline activator increases the concentration of silicates and decreases alkalinity, leading to deceleration of the reactions of slag and fly ash and the formation of C-A-S-H gels with the prolongation of setting, the retardation of acceleration period, and the decrease of peak reaction heat rate and cumulative reaction heat. This affects the early reaction products and compressive strength development of geopolymer. The compressive strength of the resultant geopolymer reaches higher than 100 MPa with a good workability and reasonable setting time when slag content is more than 50%, fly ash is less than 30% and silica fume is less than 30%, indicating a possibility of producing geopolymer-based UHPC.

ultra-high performance concrete  /  high strength geopolymer  /  silica fume  /  fresh properties  /  hardened properties  /  simplex centroid design
刘翼玮, 张祖华, 史才军, 李宁, 雷龙. 硅灰对高强地聚物胶凝材料性能的影响. 硅酸盐学报, 2020 , 48 (11) : 1689 -1699 . DOI: 10.14062/j.issn.0454-5648.20200234
Yiwei LIU, Zuhua ZHANG, Caijun SHI, Ning LI, Long LEl. Influence of Silica Fume on Performance of High-Strength Geopolymer[J]. Journal of the Chinese Ceramic Society, 2020 , 48 (11) : 1689 -1699 . DOI: 10.14062/j.issn.0454-5648.20200234
  • 国家重点研发计划(2018YFC0705400)
  • 国家自然科学基金面上项目(51878263)
  • 湖南省研究生科研创新项目(CX20190291)
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2020年第48卷第11期
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doi: 10.14062/j.issn.0454-5648.20200234
  • 接收时间:2020-03-31
  • 首发时间:2026-10-29
  • 出版时间:2020-11-20
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  • 收稿日期:2020-03-31
  • 修回日期:2020-04-26
基金
国家重点研发计划(2018YFC0705400)
国家自然科学基金面上项目(51878263)
湖南省研究生科研创新项目(CX20190291)
作者信息
    湖南大学土木工程学院,绿色先进土木工程材料及应用技术湖南省重点实验室,长沙 410082

通讯作者:

张祖华(1983—),男,博士,教授,博士研究生导师。
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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20200234
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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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