Article(id=1319987065681458012, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319987055371858691, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20210342, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1619539200000, receivedDateStr=2021-04-28, revisedDate=1625673600000, revisedDateStr=2021-07-08, acceptedDate=null, acceptedDateStr=null, onlineDate=1792639040631, onlineDateStr=2026-10-22, pubDate=1645286400000, pubDateStr=2022-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792639040631, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792639040631, creator=13701087609, updateTime=1792639040631, updator=13701087609, issue=Issue{id=1319987055371858691, tenantId=1146029695717560320, journalId=1263187385517883426, year='2022', volume='50', issue='2', pageStart='277', pageEnd='554', issueExtLink='null', onlineDate='null', pubDate='1645286400000', pubDateStr='2022-02-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1792639038174, creator='13701087609', updateTime=1792639254308, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1319987961958089069, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319987055371858691, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1319987961958089070, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1319987055371858691, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=429, endPage=437, ext={EN=ArticleExt(id=1319987065920533341, articleId=1319987065681458012, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=Mechanical Properties and Cracking Characteristics of UHPC with Hybrid Steel Fibers at Early Age under Different Curing Conditions, columnId=1263922769897599102, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Articles, runingTitle=null, highlight=null, articleAbstract=

The hydration degree and mechanical properties of ultra-high performance concrete (UHPC) specimens with hybrid steel fibers cured in air and hot water (1 d, 60℃ hot water + 2 d air), respectively, were investigated via ignition loss tests and uniaxial tensile and compressive tests. Also, the surface cracking characteristics of tensile specimens were characterized by digital image correlation technique and optical microscopy, and the microstructures were analyzed by scanning electron microscopy. The results show that compared with the results obtained in air curing, hot water curing accelerates the hydration reaction progress of the UHPC matrix, and an increase in temperature mainly contributes to the promotion of hydration reaction, thus improving the initial cracking, tensile and compressive strength of the UHPC specimens in hot water curing. However, the tensile strain capacity changes slightly. In general, the maximum crack width of the specimen decreases, the matrix becomes denser, and the interface bonding between the fibers and the matrix is stronger. The tensile strain of UHPC increases with the increase of fiber content, in which the tensile strains of the specimens with 2.5% (volume fraction) of fibers (a ratio of long fibers to short fibers is 1.25∶1.25 and 1.5∶1.0, respectively) are more than 2 ×10-3, the specimen with 1.5% long fibers and 1.0% short fibers produces more tensile cracks with the width of < 50 μm in hot water curing. The uniaxial tensile strains predicted by DIC are in reasonable agreement with the strains measured.

, authors=Lili KAN1, Fei WANG1, Haijiang WU1, Xinzhi DUAN2, 3, authorsList=Lili KAN, Fei WANG, Haijiang WU, Xinzhi DUAN, authorCompany=null, correspAuthors=null, authorNote=

KAN Lili(1980-), female, Associate Professor. E-mail:

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结合烧失量与单轴拉、压实验,研究了空气及热水(1 d,60 ℃热水+2 d空气)养护条件下混杂钢纤维超高性能混凝土(UHPC)试件的3 d龄期水化程度与力学性能,同时利用数字图像相关技术与光学显微镜对拉伸试件表面的开裂特性进行了表征,并通过扫描电子显微镜对其微观结构进行了分析。结果表明:与空气养护相比,热水养护加快了UHPC基体的水化反应进程,温度的升高是促进水化反应的主要因素;热水养护UHPC试件的初裂、抗拉及抗压强度明显提高,但其拉伸应变性能的变化并不明显;试件的最大裂缝宽度总体上有所降低;基体变得更加致密,纤维与基体的界面粘结也更强。随着纤维掺量的增加,UHPC的拉伸应变有所提高,总体积掺量为2.5%(长、短纤维比例分别为1.25∶1.25,1.5∶1.0)试件的拉伸应变均超过了2×10-3;混掺1.5%(体积分数)长纤维与1.0%短纤维试件在热水养护下产生了较多宽度小于50 μm的微裂缝。DIC技术获得的理论应变与单轴拉伸实测应变之间具有较好的吻合度。

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阚黎黎(1980—),女,博士,副教授。

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阚黎黎(1980—),女,博士,副教授。

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不同养护条件下混杂钢纤维超高性能混凝土的早龄期力学性能及开裂特性
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阚黎黎 1 , 王飞 1 , 邬海江 1 , 段昕智 2, 3
硅酸盐学报 | 研究论文 2022,50(2): 429-437
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硅酸盐学报 |研究论文 2022 , 50 (2) : 429 -437
不同养护条件下混杂钢纤维超高性能混凝土的早龄期力学性能及开裂特性
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阚黎黎1 , 王飞1, 邬海江1, 段昕智2, 3
作者信息
  • 1.上海理工大学环境与建筑学院,上海 200093
  • 2.上海市市政规划设计研究院有限公司,上海 200031
  • 3.上海城市路域生态工程技术研究中心,上海 201418
作者简介:

阚黎黎(1980—),女,博士,副教授。

Mechanical Properties and Cracking Characteristics of UHPC with Hybrid Steel Fibers at Early Age under Different Curing Conditions
Lili KAN1 , Fei WANG1, Haijiang WU1, Xinzhi DUAN2, 3
Affiliations
  • 1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2.Shanghai Municipal Planning & Design Institute Co. Ltd., Shanghai 200031, China
  • 3.Shanghai Engineering Research Center of Urban Road Ecological Technology, Shanghai 201418, China
  • KAN Lili(1980-), female, Associate Professor. E-mail:

出版时间: 2022-02-20 doi: 10.14062/j.issn.0454-5648.20210342
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结合烧失量与单轴拉、压实验,研究了空气及热水(1 d,60 ℃热水+2 d空气)养护条件下混杂钢纤维超高性能混凝土(UHPC)试件的3 d龄期水化程度与力学性能,同时利用数字图像相关技术与光学显微镜对拉伸试件表面的开裂特性进行了表征,并通过扫描电子显微镜对其微观结构进行了分析。结果表明:与空气养护相比,热水养护加快了UHPC基体的水化反应进程,温度的升高是促进水化反应的主要因素;热水养护UHPC试件的初裂、抗拉及抗压强度明显提高,但其拉伸应变性能的变化并不明显;试件的最大裂缝宽度总体上有所降低;基体变得更加致密,纤维与基体的界面粘结也更强。随着纤维掺量的增加,UHPC的拉伸应变有所提高,总体积掺量为2.5%(长、短纤维比例分别为1.25∶1.25,1.5∶1.0)试件的拉伸应变均超过了2×10-3;混掺1.5%(体积分数)长纤维与1.0%短纤维试件在热水养护下产生了较多宽度小于50 μm的微裂缝。DIC技术获得的理论应变与单轴拉伸实测应变之间具有较好的吻合度。

超高性能混凝土  /  混杂钢纤维  /  养护条件  /  早龄期  /  力学性能  /  开裂特性

The hydration degree and mechanical properties of ultra-high performance concrete (UHPC) specimens with hybrid steel fibers cured in air and hot water (1 d, 60℃ hot water + 2 d air), respectively, were investigated via ignition loss tests and uniaxial tensile and compressive tests. Also, the surface cracking characteristics of tensile specimens were characterized by digital image correlation technique and optical microscopy, and the microstructures were analyzed by scanning electron microscopy. The results show that compared with the results obtained in air curing, hot water curing accelerates the hydration reaction progress of the UHPC matrix, and an increase in temperature mainly contributes to the promotion of hydration reaction, thus improving the initial cracking, tensile and compressive strength of the UHPC specimens in hot water curing. However, the tensile strain capacity changes slightly. In general, the maximum crack width of the specimen decreases, the matrix becomes denser, and the interface bonding between the fibers and the matrix is stronger. The tensile strain of UHPC increases with the increase of fiber content, in which the tensile strains of the specimens with 2.5% (volume fraction) of fibers (a ratio of long fibers to short fibers is 1.25∶1.25 and 1.5∶1.0, respectively) are more than 2 ×10-3, the specimen with 1.5% long fibers and 1.0% short fibers produces more tensile cracks with the width of < 50 μm in hot water curing. The uniaxial tensile strains predicted by DIC are in reasonable agreement with the strains measured.

ultra-high performance concrete  /  hybrid steel fibers  /  curing conditions  /  early age  /  mechanical properties  /  cracking characteristics
阚黎黎, 王飞, 邬海江, 段昕智. 不同养护条件下混杂钢纤维超高性能混凝土的早龄期力学性能及开裂特性. 硅酸盐学报, 2022 , 50 (2) : 429 -437 . DOI: 10.14062/j.issn.0454-5648.20210342
Lili KAN, Fei WANG, Haijiang WU, Xinzhi DUAN. Mechanical Properties and Cracking Characteristics of UHPC with Hybrid Steel Fibers at Early Age under Different Curing Conditions[J]. Journal of the Chinese Ceramic Society, 2022 , 50 (2) : 429 -437 . DOI: 10.14062/j.issn.0454-5648.20210342
  • 国家自然科学基金项目(51508329)
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doi: 10.14062/j.issn.0454-5648.20210342
  • 接收时间:2021-04-28
  • 首发时间:2026-10-22
  • 出版时间:2022-02-20
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  • 收稿日期:2021-04-28
  • 修回日期:2021-07-08
基金
国家自然科学基金项目(51508329)
作者信息
    1.上海理工大学环境与建筑学院,上海 200093
    2.上海市市政规划设计研究院有限公司,上海 200031
    3.上海城市路域生态工程技术研究中心,上海 201418
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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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