Tahar El-Korchi - Research

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Research

My research has currently focused on the following: Carbon and Oxynitride glass fiber reinforced cement composites, Development of high strength composites, Development of novel tensile testing techniques, Reliability of fiber reinforced cement composites, Freezing and thawing durability of concrete, Detection of pavement surface distress using image technology, The use of imaging technology for mechanical testing of materials. Fracture Mechanics Testing of Asphalt Concrete

Recent Supported Projects

In 1991, I was the recipient of the prestigious Presidential Young Investigator Award, supported by the National Science Foundation.

Selected Publications

  1. "The Influence of Silica Fume on the Compressive Strength of Cement Paste and Mortar", H. Toutanji, T El-Korchi, Cement and Concrete Research, Vol. 25 , No. 7, 1995, pp. 1591-1602.
  2. "Assessing the Freeze-Thaw Resistance of Concrete Using the Modified AASHTO T161 (ASTM C666) Procedure", T El-Korchi, M. Simon, S. Forster, Proc. Intl Conf on Concrete Under Severe Conditions, Sapporo, Japan, 1995.
  3. "Using Quasi-Elastic Neutron Scattering Techniques for Assessing Frost Resistance in Portaland Cement Paste", DL Gress, T El-Korchi, RA Livingston, DA Neumann, JJ Rush, Proc. Intl Conf on Concrete Under Severe Conditions, Sapporo, Japan, 1995.
  4. "The Use of Imaging Technology in Pavement Management and Rehabilitation" T El-Korchi, N Wittels, Proc. Conf.-Workshop on Repair and Rehabilitation of Infrastructure of the Americas, Mayaguez, P.R. Sept. 1994.
  5. "Quantifying Freezable Water in Portland Cement Paste Using Quasi-Elastic Neutron Scattering Techniques", DL Gress, T El-Korchi,RA Livingston, DA Neumann, JJ Rush, Proc. Matl. Res. Soc., Boston, Dec 1994.
  6. "Bond Strength and Durability of Oxynitride Glass Fiber Reinforced Cement Composites", CI Palencia, T El-Korchi, GL Leatherman, DR Messier, Proc. Matl. Res. Soc., Boston, Dec 1994. (presentation)
  7. "Detecting and Characterizing Small Voids in Mostly-Diffuse Materials", N Wittels, T El Korchi, Y Li, MA Gennert, SPIE Vol. 2348, 1994.
  8. "Uniaxial Tensile Strength of Cementitious Composites", HA Toutanji and T El-Korchi, ASTM Journal of Testing and Evaluation, Vol 22, No. 3, May 1994, pp 226-232.
  9. "Strength and Reliability of Carbon-Fiber Reinforced Cement Composites", H. Toutanji, T El-Korchi, RN Katz, Cement and Concrete Composites, Vol. 16 , 1994, pp. 15-21.
  10. "Room Temperature Tensile and Flexural Strength of Ceramics in the AlN-SiC System", H.A. Toutanji, D. Friel, T. El-Korchi, R.K. Katz, G. Wechsler and W. Rafaiollo, Journal of American Ceramic Society,1994 (submitted for publication).
  11. "Behavior of Carbon Fiber Reinforced Cement Composites in Direct Tension" by H. Toutanji, T. El-Korchi, G.L. Leatherman, R.N. Katz, Cement and Concrete Research Journal, Vol. 23, 1993, pp. 618-626.
  12. "Illuminiation and Imaging Design for a Machine Vision COD Gauge",Y Li, T El-Korchi, N Wittels, SPIE Vol. 2065, 1993, pp. 46-53.
  13. "Room Temperature Tensile Strength of AlN", R.N. Katz, G Wechsler, H.A. Toutanji, D. Friel, G.L. Leatherman, T. El-Korchi and W. Rafaniello, proceedings of Ceramic Engineering and Science, Vol. 14, No. 718, 1993,pp. 282-291
  14. "Micro-mechanical and Tensile Behaviour of Carbon Fiber Reinforced Cement Composites", H.A. Toutanji and T. El-Korchi, Proceedings of the Fifteenth International Conference of Cement Microscopy, Dallas, Texas, 1993.
  15. "Testing Pavement Image Processing Systems: An Engineering Approach" by M. O. Ward, T. El-Korchi, N. Wittels, M. A. Gennert,Proceedings of Road and Airport Response Monitoring Systems, Edited V.C. Janoo and R.A. Eaton, ASCE, N.Y.,1992, pp. 41-62.
  16. "The Effect of Nitrogen Incorporation on the Properties of Alkali-Resistant Oxynitride Glasses" by T.M. Holmes, G.L. Leatherman, T. El-Korchi, Proceedings 7th Intl Conf on the Physics of Noncrystalline Solids, Cambridge U.K. August 1991. (Published by Society for Glass Technology, London).
  17. "Microstructural Characterization of Cement Solidified Heavy Metal Wastes" by D.L. Gress and T. El-Korchi,Proceedings Chemistry and Microstructure of Solidified Waste Forms, American Chemical Society, NY, NY, August 1991.
  18. "Lighting Design for Automated Pavement Surface Distress Evaluation" by Tahar El Korchi, Michael A. Gennert, Matthew O. Ward and Norman Wittels, Transportation Research Record, Vol.1311, 1991, pp. 144-148.
  19. "Alkali Resistant Oxynitride Glasses" by Thomas Holmes, Gary Leatherman and Tahar El Korchi, Journal of Materials Research, Vol. 6, No.1, 1991, p.152-158.
  20. "Tensile Testing of Cementitious Composites" by T. El-Korchi, H. Toutanji, R. N. Katz, G.L. Leatherman, H. Lucas, and C. Demers, Proceedings of the Materials Research Society, Vol. 211,1991 pp. 221-228.
  21. "Oxynitride Glass Fiber Reinforced Cementitious Composites", by T. El-Korchi, G. L. Leatherman, T. Holmes, R.N. Katz, Proceedings of the Materials Research Society, Vol. 211, 1991, pp. 105-111.
  22. "The Visual Appearance of Surface Distress in PCC Pavements: I. Crack Luminance" by Tahar El-Korchi and Norman Wittels, Transportation Research Record, 1260, 1990, pp. 74 83.
  23. "The Visual Appearance of Surface Distress in PCC Pavements: II. Crack Modelling" by Norman Wittels and Tahar El-Korchi,Transportation Research Record , Vol. 1260, 1990, pp. 84-93.
  24. "An Engineering approach to Automated Surface Distress Evaluation" by Tahar El-Korchi ,Michael Gennert, Mathew Ward and Norman Wittels, invited paper, Proc. Automated Pavement Distress-Data Collection Equipment Seminar, Iowa State University, Ames, Iowa, June , 1990.
  25. "Images for Testing Automated Pavement Surface Distress Evaluation Systems"by Norman Wittels, Tahar El-Korchi, Michael Gennert,and Mathew Ward , invited paper, Proc. Automated Pavement Distress-Data Collection Equipment Seminar, Iowa State University, Ames, Iowa, June, 1990.
  26. "Numerical Modeling of the Freezing Front in Cementitious Matrix" by T. El-Korchi, J. Sullivan and A. Alexandrou., Proceedings of the Materials Research Society, Vol. 137, pp. 1990.
  27. "Seawater Leachability of Cement Solidified Heavy Metal Waste", T. El-Korchi, K. Campbell and D. Gress, Proceedings of the Materials Research Society, Volume 137. 1990.
  28. "Evaluation of the Freeze-Thaw Durability of Portland Cement Solidified Heavy Metal Waste Using Acoustic Measurements", by El-Korchi T., Gress D., Baldwin K.and Bishop P., Environmental Aspects of Stabilization/Solidification of Hazardous and Radioactive Wastes, ASTM STP 1033, P.L. Cote and T.M. Gilliam, Eds., Am Soc for Testing and Matl, Philadelphia, 1989, pp 184-191.
  29. "Stabilization of Cadmium and Lead in Portland Cement Paste Using a Synthetic Seawater Leachant", by Melchinger K., El-Korchi T., Gress D., Bishop P., Environmental Progress, Vol. 6, No. 2, 1987.
  30. "The Effect of Heavy Metals and Organic Solvents on the Microstructure of Portland Cement Solidified Waste",T. El-Korchi, K. Melchinger, B. Kolvites, and D. Gress, Proceedings of the 8th International Conference on Cement Microscopy, International Cement Microscopy Association, August, 1986, Orlando, FL.
  31. "Comparing Two Methods of Stopping the Early Hydration of Cement Paste", T. El-Korchi and D. Gress, Proceedings of the 8th International Conference on Cement Microscopy, International Cement Microscopy Association, August, 1986, Orlando, FL.
  32. "Determination of the Expansive Mechanism Operative in Portland Cement Stabilized Solidified Cadmium Waste Leached in Seawater", T. El-Korchi, K. Melchinger, B. Kolvites, and D. Gress, Proceedings of the 9th International Conference on Cement Microscopy, International Cement Microscopy Association, Reno, Nevada, 1987.
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