Advertisement

Journal of Central South University

, Volume 26, Issue 12, pp 3279–3294 | Cite as

Role of matrix structure and flaw size distribution modification on deflection hardening behavior of polyvinyl alcohol fiber reinforced engineered cementitious composites (PVA-ECC)

  • Kamile Tosun Felekoğlu
  • Eren GödekEmail author
Article
  • 3 Downloads

Abstract

The multiple cracking and deflection hardening performance of polyvinyl alcohol fiber reinforced engineered cementitious composites (PVA-ECC) under four-point flexural loading have been investigated. Matrices with different binder combinations and W/B ratios (from 0.44 to 0.78) providing satisfactory PVA fiber dispersion were specially designed. Effect of pre-existing flaw size distribution modification on deflection hardening behavior was comparatively studied by adding 3 mm diameter polyethylene beads into the mixtures (6% by total volume). Natural flaw size distributions of composites without beads were determined by cross sectional analysis. The crack number and crack width distributions of specimens after flexural loading were characterized and the possible causes of changes in multiple cracking and deflection hardening behavior by flaw size distribution modification were discussed. Promising results from the view point of deflection hardening behavior were obtained from metakaolin incorporated and flaw size distribution modified PVA-ECCs prepared with W/B=0.53. The dual roles of W/B ratio and superplasticizer content on flaw size distribution, cracking potential and fiber-matrix bond behavior were evaluated. Flaw size distribution modification is found beneficial in terms of ductility improvement at an optimized W/B ratio.

Key words

fiber reinforced cementitious composites metakaolin deflection hardening multiple cracking flaw size distribution 

基体结构和缺陷尺寸分布改性对聚乙烯醇纤维增强工程 水泥基复合材料(PVA-ECC)挠度硬化行为的影响

摘要

研究了聚乙烯醇纤维增强工程水泥基复合材料(PVA-ECC)在四点弯曲载荷作用下的多重开裂 和挠度硬化性能, 设计了不同粘结剂组合和水胶比(W/B)(0.44~0.78)的矩阵,使PVA 纤维得到了较 好的分散。通过在混合物中加入直径为3 mm 的聚乙烯微球(总体积为6%),比较研究了预先存在的 缺陷尺寸分布修正对挠度硬化行为的影响。通过横断面分析,确定了无珠复合材料的自然缺陷尺寸分 布。对弯曲加载后试件的裂纹数和裂纹宽度分布进行了表征,并讨论了缺陷尺寸分布改性引起多次裂 纹和挠度硬化行为变化的可能原因。在W/B=0.53 的条件下制备了含偏高岭土和缺陷尺寸分布改性的 PVA-ECC, 得到了较好的挠度硬化行为。分析了W/B 比和超增塑剂含量对缺陷尺寸分布、潜在开裂、 和纤维-基体粘结行为的双重作用。在优化的W/B 比下,发现了有利于改善延展性的尺寸分布修正。

关键词

纤维增强胶凝复合材料 偏高岭土 挠度硬化 多重开裂 缺陷尺寸分布 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

Acknowledgments

The authors would like to gratefully acknowledge the cooperation of Civil Engineers; Emin Demirkaya, Gülizar Sönmez, Selim Aykal Akıl and Sabri Kökmen for specimen preparation and testing are greatly appreciated. The authors are also thankful to Çimentas Group (Cementir Holding), Powerpozz-USA and Kuraray Co. Ltd. for supplying the materials used in this research.

References

  1. [1]
    BENTUR A, MINDESS S. Fibre reinforced cementitious composites [M]. London: CRC Press, Technology & Engineering, 1990.Google Scholar
  2. [2]
    LI J, ZHANG Y X. Evaluation of constitutive models of hybrid-fibre engineered cementitious composites under dynamic loadings [J]. Construction and Building Materials, 2012, 30: 149–160. DOI:  https://doi.org/10.1016/j.conbuildmat.2011.11.031.CrossRefGoogle Scholar
  3. [3]
    NAAMAN A E, REINHARDT H W. Proposed classification of HPFRC composites based on their tensile response [J]. Materials and Structures, 2006, 39(5): 547–555. DOI:  https://doi.org/10.1617/s11527-006-9103-2.CrossRefGoogle Scholar
  4. [4]
    LI V C, WU H C. Conditions for pseudo strain-hardening in fiber reinforced brittle matrix composites [J]. Journal of Applied Mechanics Review, 1992, 45(8): 390–398. DOI:  https://doi.org/10.1115/1.3119767.CrossRefGoogle Scholar
  5. [5]
    KIM J D, NAAMAN A E, EL-TAWIL S. Comparative flexural behavior of four fiber reinforced cementitious composites [J]. Cement and Concrete Composites, 2008, 30(10): 917–928. DOI:  https://doi.org/10.1016/j.cemconcomp.2008.08.002.CrossRefGoogle Scholar
  6. [6]
    KESKİNATEŞ M, FELEKOĞLU B. The influence of mineral additive type and water/binder ratio on matrix phase rheology and multiple cracking potential of HTPP-ECC [J]. Construction and Building Materials, 2018, 173: 508–519. DOI:  https://doi.org/10.1016/j.conbuildmat.2018.04.038.CrossRefGoogle Scholar
  7. [7]
    SHAIKH F U A. Deflection hardening behavior of short fibre reinforced fly ash based geo-polymer composites [J]. Materials and Design, 2013, 50: 674–682. DOI:  https://doi.org/10.1016/j.matdes.2013.03.063.CrossRefGoogle Scholar
  8. [8]
    WILLE K, EL-TAWIL S, NAAMAN A E. Properties of strain hardening ultra-high performance fiber reinforced concrete (UHP-FRC) under direct tensile loading [J]. Cement and Concrete Composites, 2014, 48: 53–66. DOI:  https://doi.org/10.1016/j.cemconcomp.2013.12.015.CrossRefGoogle Scholar
  9. [9]
    LI V C. On engineered cementitious composites (ECC)—A review of the material and its applications [J]. Journal of Advanced Concrete Technology, 2003, 1(3): 215–230. DOI:  https://doi.org/10.3151/jact.1.215.CrossRefGoogle Scholar
  10. [10]
  11. [11]
    RANADE R, ZHANG J, LYNCH J P, LI V C. Influence of micro-cracking on the composite resistivity of engineered cementitious composites [J]. Cement and Concrete Research, 2014, 58: 1–12. DOI:  https://doi.org/10.1016/j.cemconres.2014.01.002.CrossRefGoogle Scholar
  12. [12]
    WANG S. Micromechanics based matrix design for engineered cementitious composites [D]. USA: The University of Michigan, 2005. https://deepblue.lib.umich.edu/handle/2027.42/125251.Google Scholar
  13. [13]
    KANDA T, LI V C. Effect of fiber strength and fiber-matrix interface on crack bridging in cement composites [J]. Journal of Engineering Mechanics, 1999, 125(3): 290–299. DOI:  https://doi.org/10.1061/(ASCE)0733-9399(1999)125:3(290).CrossRefGoogle Scholar
  14. [14]
  15. [15]
    LI V C. Tailoring ECC for special attributes: A review [J]. International Journal of Concrete Structures and Materials, 2012b, 6(3): 135–144. DOI:  https://doi.org/10.1007/s40069-012-0018-8.MathSciNetCrossRefGoogle Scholar
  16. [16]
    LI V C, MISHRA D K, WU H C. Matrix design for pseudo-strain-hardening fibre reinforced cementitious composites [J]. Materials and Structures, 1995, 28(10): 586–595. DOI:  https://doi.org/10.1007/BF02473191.CrossRefGoogle Scholar
  17. [17]
    LU C, LI V C, LEUNG C K. Flaw characterization and correlation with cracking strength in engineered cementitious composites (ECC) [J]. Cement and Concrete Research, 2018, 107: 64–74. DOI:  https://doi.org/10.1016/j.cemconres.2018.02.024.CrossRefGoogle Scholar
  18. [18]
    WANG S, LI V C. Tailoring of pre-existing flaws in ECC matrix for saturated strain hardening [C]// Proceedings of FRAMCOS-5. Vail, Colorado, 2004: 1005–1012. https://deepblue.lib.umich.edu/bitstream/handle/2027.42/84774/WangFramcos5.pdf?sequence=1&isAllowed=y.
  19. [19]
    LI V C, WANG S. Microstructure variability and macroscopic composite properties of high performance fiber reinforced cementitious composites [J]. Probabilistic Engineering Mechanics, 2006, 21(3): 201–206. DOI:  https://doi.org/10.1016/j.probengmech.2005.10.008.CrossRefGoogle Scholar
  20. [20]
    ASTM C1437. Standard test method for flow of hydraulic cement mortar [S]. ASTM International.Google Scholar
  21. [21]
    ASTM C349. Standard test method for compressive strength of hydraulic-cement mortars (Using portions of prisms broken in flexure) [S]. ASTM International. DOI: 10.1520/C0349-18.Google Scholar
  22. [22]
    LI M, LI V C. Rheology, fiber dispersion, and robust properties of engineered cementitious composites [J]. Materials and Structures, 2013, 46(3): 405–420. DOI:  https://doi.org/10.1617/s11527-012-9909-z.CrossRefGoogle Scholar
  23. [23]
    KANDA T, LI V C. Practical design criteria for saturated pseudo strain hardening behavior in ECC [J]. Journal of Advanced Concrete Technology, 2006, 4(1): 59–72. DOI:  https://doi.org/10.3151/jact.4.59.CrossRefGoogle Scholar
  24. [24]
    ASTM C1609/C1609M. Standard test method for flexural performance of fiber-reinforced concrete (Using beam with third-point loading) [S]. ASTM International. DOI:  https://doi.org/10.1520/C1609_C1609M-12.
  25. [25]
    TONOLI G H D, RODRIGUES FILHO U P, SAVASTANO H Jr, BRAS J, BELGACEM M N, LAHR F R. Cellulose modified fibres in cement based composites [J]. Composites Part A: Applied Science and Manufacturing, 2009, 40(12): 2046–2053. DOI:  https://doi.org/10.1016/j.compositesa.2009.09.016.CrossRefGoogle Scholar
  26. [26]
    ZHOU J, PAN J, LEUNG C. Mechanical behavior of fiber-reinforced engineered cementitious composites in uniaxial compression [J]. Journal of Materials in Civil Engineering, 2015, 27(1): 04014111. DOI:  https://doi.org/10.1061/(ASCE)MT.1943-5533.0001034.CrossRefGoogle Scholar
  27. [27]
    KANDA T, LI V C. Interface property and apparent strength of high-strength hydrophilic fiber in cement matrix [J]. Journal of Materials in Civil Engineering, 1998, 10(1): 5–13. DOI:  https://doi.org/10.1061/(ASCE)0899-1561(1998)10:1(5).CrossRefGoogle Scholar
  28. [28]
    LI V C, WU C, WANG S, OGAWA A, SAITO T. Interface tailoring for strain-hardening polyvinyl alcohol-engineered cementitious composite (PVA-ECC) [J]. Materials Journal, 2002, 99(5): 463–472. https://www.researchgate.net/profile/Victor_Li23/publication/280224066_Interface_Tailoring_for_Strain-hardening_PVA-ECC/links/58c6f9afa6fdccde55e4134d/Interface-Tailoring-for-Strain-hardening-PVA-ECC.pdf.Google Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringDokuz Eylül UniversityİzmirTurkey
  2. 2.Department of Construction TechnologyHitit UniversityÇorumTurkey

Personalised recommendations