Advertisement

Fibers and Polymers

, Volume 7, Issue 3, pp 286–294 | Cite as

Flexural characteristics of coir fiber reinforced cementitious composites

  • Zhijian Li
  • Lijing Wang
  • Xungai Wang
Article

Abstract

This study has examined the flexural properties of natural and chemically modified coir fiber reinforced cementitious composites (CFRCC). Coir fibers of two different average lengths were used, and the longer coir fibers were also treated with a 1 % NaOH solution for comparison. The fibers were combined with cementitious materials and chemical agents (dispersant, defoamer or wetting agent) to form CFRCC. The flexural properties of the composites, including elastic stress, flexural strength, toughness and toughness index, were measured. The effects of fiber treatments, addition of chemical agents and accelerated ageing of composites on the composites’ flexural properties were examined. The results showed that the CFRCC samples were 5–12 % lighter than the conventional mortar, and that the addition of coir fibers improved the flexural strength of the CFRCC materials. Toughness and toughness index, which were associated with the work of fracture, were increased more than ten times. For the alkalized long coir fiber composites, a higher immediate and long-term toughness index was achieved. SEM microstructure images revealed improved physicochemical bonding in the treated CFRCC.

Keywords

Coir fibers Mechanical properties Fracture toughness Cement Surface treatments 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    B. Moir, “Proceeding of International Coir Convention”, pp.23–29, Colombo, Sri Lanka, 2002.Google Scholar
  2. 2.
    M. Abad, P. Noguera, P. Puchades, A. Maquieira, and V. noguera,Bioresource Technology,82, 241 (2002).CrossRefGoogle Scholar
  3. 3.
    L. K. Aggarwal,Cement and Concrete Composites,14, 63 (1992).CrossRefGoogle Scholar
  4. 4.
    G. Shimizu and P. Jorillo, Fibre Reinforced Cement and Concrete: The 4th International Symposium, RILEM, University of Sheffield, UK, Sheffield (1992).Google Scholar
  5. 5.
    R. Viswanathan and L. Gothandapani,Bioresource Technology,67, 93 (1999).CrossRefGoogle Scholar
  6. 6.
    A. Ramirez-Coretti, Fibre Reinforced Cement and Concrete: The 4th International Symposium, RILEM, University of Sheffield, UK, Sheffield (1992).Google Scholar
  7. 7.
    H. S. Ramaswamy, B. M. Ahuja, and S. Krishnamoorthy,The International Journal of Cement Composites and Lightweight Concrete,5(1), 3 (1983).CrossRefGoogle Scholar
  8. 8.
    N. C. D. Gupta, P. Paramasivam, and S. L. Lee,Housing Science,2(6), 391 (1978).Google Scholar
  9. 9.
    P. Jorillo and G. Shimizu, Fibre Reinforced Cement and Concrete: The 4th International Symposium, RILEM, University of Sheffield, UK, Sheffield (1992).Google Scholar
  10. 10.
    R. M. Rowell, “Proceeding of International Coir Convention”, pp.75–95, Colombo, Sri Lanka, 2002.Google Scholar
  11. 11.
    J. Rout, M. Misra, S. S. Tripathy, S. K. Nayak, and A. K. Mohanty,Composites Science and Technology,61, 1303 (2001).CrossRefGoogle Scholar
  12. 12.
    P.-W. Chen and D. D. L. Chung,Composites,24(1), 33 (1993).CrossRefGoogle Scholar
  13. 13.
    R. MacVicara, L. M. Matuanab, and J. J. Balatinecza,Cement and Concrete Composites,21(3), 189 (1999).CrossRefGoogle Scholar
  14. 14.
    S. H. Aziz and M. P. Ansell,Composites Science and Technology,64, 1219 (2004).CrossRefGoogle Scholar

Copyright information

© The Korean Fiber Society 2006

Authors and Affiliations

  1. 1.Centre for Material and Fibre InnovationDeakin UniversityGeelongAustralia

Personalised recommendations