[1] Guo Liping, Chen Bo, Wu Yue, et al. Effect of fiber type on the bending and uniaxial tensile propertiesof high-strength high-ductility cementitious composites [J]. Journal of Southeast University (English Edition), 2018, 34 (4): 495-499. [doi:10.3969/j.issn.1003-7985.2018.04.012]

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Effect of fiber type on the bending and uniaxial tensile propertiesof high-strength high-ductility cementitious composites()

纤维类型对高强高延性水泥基复合材料弯拉性能的影响

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

34

Issue:

2018 4

Page:

495-499

Research Field:

Materials Sciences and Engineering

Publishing date:

2018-12-20

Info

Title:

Effect of fiber type on the bending and uniaxial tensile propertiesof high-strength high-ductility cementitious composites

纤维类型对高强高延性水泥基复合材料弯拉性能的影响

Author(s):

Guo Liping¹;  2;  Chen Bo³;  Wu Yue¹;  2;  Lei Dongyi¹;  2

¹ School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
² Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing 211189, China
³ State Key Laboratory of H

郭丽萍¹;  2;  陈波³;  吴樾¹;  2;  雷东移¹;  2

¹东南大学材料科学与工程学院, 南京 211189; ²东南大学江苏省土木工程材料重点实验室, 南京 211189; ³南京水利科学研究院水文水资源与水利工程科学国家重点实验室, 南京 210029

Keywords:

fiber;  high ductility;  toughness;  uniaxial tensile

纤维;  高延性;  弯曲韧性;  单轴拉伸

PACS:

TU528

DOI:

10.3969/j.issn.1003-7985.2018.04.012

Abstract:

To investigate the effect of fiber types on bending and tensile properties of high-strength, high-ductility cementitious composites(HS-HDCCs), ultra-high-molecular-weight polyethylene(PE)fibers, polyvinyl alcohol(PVA)fibers, and copper-plated micro steel fibers were selected as the reinforcement materials. The bending and tensile properties of HS-HDCCs with different fibers with a volume fraction of 2% were studied. The results indicate that PE, PVA, micro steel, and PVA-PE hybrid fibers impart varying degrees of toughening and improve the tensile strength. During the tensile and bending processes, HS-HDCCs with micro steel fibers exhibit a strain-softening phenomenon. HS-HDCCs with PVA fibers or with PVA-PE hybrid fibers can achieve multiple cracking behaviors and strain hardening phenomenon to a certain extent and show slight high-ductility characteristics. HS-HDCCs with PE fibers exhibit multiple cracking behavior and strain hardening phenomenon and show significant high-ductility characteristics. The test results can provide a basis for selecting fibers suitable for HS-HDCCs reinforcement.

为了考察纤维类型对高强高延性水泥基复合材料(HS-HDCC)弯曲与拉伸性能的影响, 选取了超高分子量聚乙烯(PE)纤维、聚乙烯醇(PVA)纤维和镀铜微细钢纤维3种纤维在体积掺量为2%时, 研究不同类型纤维对HS-HDCC的弯曲与拉伸性能的影响.结果表明:PE, PVA和微细钢纤维单掺或PVA-PE混杂, 均对HS-HDCC 有增韧和提高抗拉强度的效果.在弯曲和拉伸过程中, HS-HDCC单掺微细钢纤维时呈应变软化破坏;单掺PVA纤维和PVA-PE混杂可在一定程度上实现多缝开裂和应变硬化, 有一定的高延性特性;单掺PE纤维可明显实现多缝开裂和应变硬化, 有显著的高延性特性.研究结果为HS-HDCC优选合适的纤维提供了依据.

References:

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Memo

Memo:

Biography: Guo Liping(1979—), female, doctor, associate professor, guoliping691@163.com.
Foundation items: The National Key Research and Development Program of China(No.2016YFC0401610), the National Natural Science Foundation of China(No.51778133, 51739008, 51438003).
Citation: Guo Liping, Chen Bo, Wu Yue, et al. Effect of fiber type on the bending and uniaxial tensile properties of high-strength high-ductility cementitious composites[J].Journal of Southeast University(English Edition), 2018, 34(4):495-499.DOI:10.3969/j.issn.1003-7985.2018.04.012.

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