Civil Engineering

Medhat Shehata,  PhD OFFICE:  MON216 TELEPHONE:  416-979-5000 ext 6457 EMAIL: mshehata@ryerson.ca   WEBSITE:

EDUCATION

Ph.D., Civil Engineering, University of Toronto, Canada

RESEARCH INTERESTS

Construction and repair materials; evaluation of deteriorated structures; alkali-aggregate reaction; sulphate attack; concrete at extreme environment; development of test methods; volume change of concrete; supplementary cementing materials; alternative supplementary cementing materials; use of reclaimed concrete aggregate in concrete and other construction materials; pervious concrete; pavement analysis and design; stabilization and enhancement of highway materials; performance and testing of asphalt concrete

RESEARCH PROJECTS

Alkali-aggregate reaction: mechanisms, effects, preventive measures and development of accelerated test methods
Use of sulphide-bearing aggregates in concrete: Testing, effects on concrete and role of mix design.
Sulphate attack in concrete: mechanisms of different forms of sulphate attack, testing and preventive measures
Durability of concrete: mass transport, shrinkage, and resistance to freezing and thawing and salt scaling
Use of supplementary cementing materials in concrete
Development of sustainable unshrinkable fill using construction by-products and aggregates of different qualities
Reactivity of recycled concrete aggregate: testing and preventive measures
Recycling of demolished concrete as aggregate in new structures and municipal works
Calibration of Mechanistic-Empirical Pavement Design Guide (M-E PDG) Distress Models
Pervious concrete: optimization of properties and long-term performance
Simple performance testing of asphalt concrete.

TEACHING FIELDS

CVL423  Geology for Engineers
CVL533  Concrete Materials
CVL633  Highway Materials
CV8405  Pavement Design and Management (graduate)
CV8106  Advances in Concrete Materials (graduate)
CV8100  Directed Studies in Civil Engineering (graduate)

TEACHING AWARDS

In his first year of employment with Ryerson, Dr. Shehata received the Teaching Excellence Award of the Faculty of Engineering and Applied Science for the academic year 2002/2003. In the second year, 2003/2004, Dr. Shehata received Ryerson's GREET Teaching Excellence Award from the Group to Renew and Enhance Effective Teaching (GREET), Ryerson University.

SELECTED PUBLICATIONS

Shehata, M.H., Christidis, C., Mikhaiel, W., Rogers, C. and Lachemi, M., "Reactivity of reclaimed concrete aggregate produced from concrete affected by alkali-silica reaction", Cement & Concrete Research Volume 40, Issue 4, April 2010, 575-582

Shehata, M.H. and Thomas, M.D.A., The role of alkali content of Portland cement on the expansion of concrete prisms containing reactive aggregates and supplementary cementing materials. Cement and Concrete Research, Volume 40, Issue 4, April 2010, 569-574

Lachemi, M., Sahmaran, M., Hossain, K.M.A., Lotfy, A., Shehata, M. "Properties of controlled low-strength materials incorporating cement kiln dust and slag". Cement and Concrete Composites, Volume 32, Issue 8, September 2010, Pages 623-629

Ahmed, A., Shehata, M and Easa, S. "Use of Factory-Waste Shingles and Cement Kiln Dust to Enhance the Performance of Soil Used in Road Works" Advances in Civil Engineering Vol. 2009 (2009), Article ID 143750, 9 p. doi:10.1155/2009/143750

Achtemichuk S, Hubbard J, Sluce R, Shehata M "The utilization of recycled concrete aggregate to produce controlled low-strength materials without using Portland cement" Cement and Concrete Composites, Volume 31, Issue 8, September 2009, 564-569

Shehata M, Adhikari G and Radomski S "Long-term durability of blended cement against Sulphate attack" ACI Material Journal, Vol. 105, No 6, 2008, pp. 594-602

Thomas, M., Fournier, B., Folliard, K., Shehata, M., Ideker, J and Rogers, C. "Performance Limits for Evaluating Supplementary Cementing Materials Using Accelerated Mortar Bar Test", ACI Materials Journal, March/April 2007, pp. 115-122

Shehata, M., Navarra, M. , Klement, T., Lachemi, M. and Schell, H. "Use of Wet Cellulose to Cure Shotcrete Repairs on Bridge Soffits, Part 1: Field Trial and Observations". Canadian Journal of Civil Engineering, Vol. 33:7, July 2006, pp 807-814.

Shehata, M., Navarra, M., Klement, T., Lachemi, M and Schell, H. "Use of Wet Cellulose to Cure Shotcrete Repairs on Bridge Soffits, Part 2: Laboratory Testing and Analysis". Canadian Journal of Civil Engineering, Vol. 33:7, July 2006, pp 815-826

Shehata, M. and Thomas M, "Alkali Release Characteristics of Blended Cement". Cement and Concrete Research, Vol. 36, June 2006, pp 1166-1175

Thomas, M. , Fournier B., Folliard K., Ideker, J. and Shehata, M. "Test Methods for Evaluating Preventive Measures for Controlling Expansion due to Alkali-Silica Reaction in Concrete". Cement and Concrete Research, Vol. 36, July 2006, pp 1842-1856.

Shehata, M.H. and Thomas, M.D.A. "Use of Ternary Blends Containing Silica Fume and Fly Ash to Suppress Alkali Silica Reaction in Concrete". Cement and Concrete Research Vol. 32, 2002, pp. 341-349

Shehata, M.H. and Thomas, M.D.A. "The Effects of Fly Ash Composition on the Expansion of Concrete Due to Alkali-Silica Reaction". Cement and Concrete Research Vol. 30, 2000, pp. 1063-1072.

Shehata, M.H., Thomas, M.D.A and Bleszynski, R.F. "The Effect of Fly Ash Composition on the Chemistry of Pore Solution." Cement and Concrete Research Vol. 29, 1999, pp. 1915-1920.

Thomas, M.D.A and Shehata, M.H. "Use of Multicomponent Cementitious Systems in High-Performance Concrete" ACI SP 189-17, January 2000, pp 295-309.

Thomas, M.D.A., Shehata, M.H., Shashiprakash, S.G., Hopkins, D.S. and Cail, K. "Use of Ternary Cementitious Systems Containing Silica Fume and Fly Ash in Concrete." Cement and Concrete Research, 1999, Vol. 29, 1999, pp. 1207-1214.

Thomas, M.D.A, Shehata, M.H. and Shashiprakash, S.G. "The Use of Fly Ash in Concrete: Classification by Composition." Cement, Concrete and Aggregate, CCAGDP, Vol. 21, No.2 Dec. 1999, pp. 105-110.

Kandasamy, S. and Shehata M. "Surface Testing to Evaluate Water-Cement Ratio in Hardened Concrete". 1st International/1st Engineering Mechanics and Materials Specialty Conference Proceedings of the Annual Conference of the Canadian Society for Civil Engineering, St. John's NL, May 26-30, 2009, IEMM-013-6 - IEMM-013-10.

Radwan, Ramy Z., Medhat H. Shehata, Gamal E. Abdelaziz, M. Osama R. El Hariri, Assem M.K. Abdelalim. "The Impact of Expansion due to Alkali-Carbonate Reaction on Engineering Properties of Concrete" 1st International/1st Engineering Mechanics and Materials Specialty Conference” Proceedings of the Annual Conference of the Canadian Society for Civil Engineering, St. John's NL, May 26-30, 2009, IEMM-011-6 - IEMM-011-10.

Fournier, B., Chevrier, R., de Grosbois, M., Lisella, R., Folliard, K., Ideker, J., Shehata, M., Thomas, M. and Baxter, S. "The accelerated concrete prism test (60oC): variability of the test method and proposed expansion limits." Proc. 12th Int. Conf. on Alkali-Aggregate Reaction in Concrete, Beijing, China, Vol. 1, 2004, pp. 314-323

Shehata, M.H. and Thomas, M.D.A. "The Effects of Silica Fume and Fly Ash Hydration Products on the Chemistry of the Pore Solution and Portlandite Consumption" Proceedings of the 11th International Conference on Alkali-Aggregate Reaction in Concrete, Quebec City, Canada, June 2000, pp. 753-762.

Shehata, M., S. Jagdat, M. Lachemi, and C. Rogers, Do supplementary cementing materials control alkali-carbonate reaction?, Proceedings 17th Annual Symposium, Ed. D. Fowler and J. Allen, International Centre for Aggregate Research, University of Texas, Austin, May, 2009.

Shrestha, N., Shehata, M., Easa, S, Senior, S., Rogers, C and Essex, R "Use of Processed Tear-off Roof Shingles to Improve Performance of Roadbase Materials" Proceedings of the of the 2008 Annual Conference of the Transportation Association of Canada (TAC), Toronto, Ontario, 21-24 September 2008

Shehata, M. and Nawaz, M "Use of Tear-Off Roof Shingles in Stone Mastic Asphalt Mixtures" Proceedings of the 33rd Annual Conference of the Canadian Society for Civil Engineering, GC-235-1 - GC-235-8, June 2005.

CURRICULUM VITAE