Journal of Materials Science

, Volume 43, Issue 12, pp 4107–4111 | Cite as

Effect of plant-derived organic binders on fracture toughness and fatigue of kaolin-based refractories

  • M. S. Njogu
  • F. W. Nyongesa
  • B. O. Aduda
Rees Rawlings Festschrift


The fracture properties of kaolin-based refractories prepared using plant-derived binders from okra and “mrenda” have been investigated and compared. It was observed that the MOR of fired samples improved from 37.5 ± 0.1 MPa (for binder-free samples) to 69.6 ± 0.1 MPa, and to 120.0 ± 0.1 MPa for okra- and ‘mrenda’-plasticized samples, respectively, while the fracture toughness increased from 3.9 ± 0.1 MPa (for binder-free samples) to 5.6 ± 0.1 and 5.7 ± 0.1 MPa for okra and ‘mrenda’-plasticized samples, respectively. It is concluded that the use of organic binders enhances the reliability and service life of kaolin refractories used in thermally fluctuating environments.


Fracture Toughness Kaolin Sintered Density Weibull Modulus Organic Binder 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of NairobiNairobiKenya

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