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Unsaturated Soil Technologies was formed by Prof. Delwyn G. Fredlund, P. Eng.

He has spent more than 35 years conducting research into the behavior of unsaturated and expansive soils. Most of his career was spent at the University of Saskatchewan, Saskatoon, where he organized the Unsaturated Soils Group for research into all aspects of unsaturated soils behavior. His research studies have involved all areas of unsaturated soil behavior; ranging from flow through unsaturated soils to the shear strength and volume change of unsaturated soils.

Del Fredlund is a native of Saskatchewan, having grown up in the town of Norquay, Sask., near to the Manitoba border. In 1962 he obtained his B.Sc. degree from the University of Saskatchewan, Saskatoon. Immediately following his B.Sc. degree he went to work for the Division of Building Research of the National Research Council in Saskatoon, Sask. He then went on to obtain his M.Sc. degree in 1964 from the University of Alberta, Edmonton. Following his M.Sc. degree, he worked as a geotechnical consulting engineer for R.M. Hardy and Associates, Edmonton, Alberta.

In 1966 Del Fredlund accepted a position in the Department of Civil Engineering at the University of Saskatchewan, Saskatoon. In 1973 he obtained his Ph.D. after returning to the University of Alberta for his studies. Returning to the University of Saskatchewan, he developed a research program focused around the behaviour of unsaturated soils and the numerical modeling of unsaturated soils problems. During his career he supervised over 65 M.Sc. and Ph.D. graduate students. He became the Head of the Department of Civil Engineering at the University of Saskatchewan from 1989 to 1994. He has also been appointed as an Adjunct Professor at Nanyang Technological University, Singapore and the Hong Kong University of Science and Technology, Hong Kong as well as at the University of Alberta, Edmonton. In addition, he is an Honorary Professor at the University of British Columbia, Vancouver, B.C. and a Research Professor at Arizona State University, Tempe, Arizona.

Throughout his career, Dr. Fredlund’s research studies have focused on unsaturated soil mechanics and the behaviour of unsaturated soils. The emphasis has been upon the fundamental physical behaviour of unsaturated soils as well as the numerical modelling of saturated-unsaturated soil systems. Significant contributions has been made in all the classic areas of unsaturated soil systems; including the stability of slopes, flow through saturated-unsaturated soil systems, and the prediction of heave in expansive soils.

Dr. Fredllund is the author, along with Dr. Harianto Rahardjo, of the book Soil Mechanics for Unsaturated Soils, published by John Wiley & Sons in 1993. This book still remains the single key reference on unsaturated soil mechanics.

Dr. Fredlund published over 300 journal and conference research papers and has delivered many keynote lectures at conferences. He is the founder of the software company, Geo-Slope International Ltd., Calgary, Canada, as well as the founder of Unsaturated Soil Technologies Ltd, Saskatoon. Canada, and an equipment designer of unsaturated soil testing equipment for GCTS in Tempe, Arizona.

Dr. Fredlund has been the recipient of numerous awards such as the:

  • Legget Award from the Canadian Geotechnical Society.

  • Award from the Brazilian Geotechnical Society for “His great contribution to the technical, scientific and educational development of unsaturated soil mechanics”

  • Award from the Ministry of Science and Technology, MOSTE, Vietnam, for his contribution to scientific development in Vietnam.

  • Kassiff Award from Israel

  • Spencer Buchanan Award from Texas A & M, College Station, Texas.

  • Stermac Award from Canadian Geotechnical Society.

  • Canadian Colloquium Award from Canadian Geotechnical Society.

Dr. Fredlund served as the Chairman of TC6 committee on Unsaturated Soils, of the ISSMGE for 12 years. He took early retirement from the University of Saskatchewan in 2000 in order to be able to fully devote his time to research into unsaturated soil behaviour and the solution of practical geotechnical engineering problems in various parts of the world. His work on unsaturated soil mechanics has taken him to many countries of the world as a lecturer, a teacher and a consultant. He has undertaken international programs of collaboration with countries such as China, Africa and Vietnam.

At present, the primary focus of Dr. Fredlund’s work involves bringing unsaturated soil mechanics into routine geotechnical engineering practice.

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For a complete listing of items click the "News / Events" title above to be taken to our news listings page.

 SEPTEMBER 8-10 / 2009

International Symposium on Geoenvironmental Engineering, ISGE 2009, Hangzhou, China

 SEPTEMBER 19-26 / 2009

Canadian Geotechnical Conference, Halifax, Canada

 OCTOBER 5-10 / 2009

17th International Conference on Soil Mechanics and Geotechnical Engineering (ISSMGE) Alexandria, Egypt

 OCTOBER 26 / 2009

Lovell Lecture, Purdue University, Lafayette, Indianna

 NOVEMBER 23-25 / 2009

4th Asia-Pacific Conference on Unsaturated Soils Newcastle, Australia

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