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Aussi disponible en français: Une solution simple et novatrice au problème du soulèvement des chaussées en hiver

Canadian Society for Civil Engineering 1998 CSCE Annual Conference: 10 June 1998, Halifax, Nova Scotia

1st World Conference on Highway Surfacing: 11 May 1998, Budapest, Hungary

Roadware 97 4th International Road Conference: 10 June 1997, Prague, Czech Republic

The paper presents the development of a computer program VIEM for the elastic analysis ofmultilayered elastic pavements under the action of arbitrary tire-pavement contact pressuredistributions. The techniques adapted in VIEM primarily involves the use of a two-dimensional numerical integration to integrate point load solutions over the distributed pressure after discretizing the contact area into a finite number of triangular or quadrilateral elements. Values of contact pressure are inputted at the node points of discretized area. Numerical verification of VIEM indicates that numerical solution of high accuracy caD be efficiently calculated for the elastic response of multilayered asphalt pavements. As a result, the determination of displacements and stresses (strains) can be achieved using a personal computer. With the use of VIEM, a theoretical investigation is further performed to illustrate the effects of tire-pavement contact pressure distributions on the response of asphalt concrete pavements. An in situ measured tire - pavement contact pressure distribution is utilized in the investigation. Theresponse of asphalt concrete pavements due to the action of this measured contact pressure distribution is examined and compared with that due to the action of a uniform and circular contact pressure distribution by taking into account the influences of moduli and thicknesses of structural layers. The results of this investigation confirm theoretically a general consensus that details of the contact pressure distribution affect stresses and strains near the surface of the pavement, whereas the response in the lower layers depends mainly on the overall load. In particular, the contact pressure distributions have a significant effect on the horizontal tensile strains at the bottom of thin asphalt concrete layer which control the fatigue failure of asphalt pavements.

Dynamic Interaction of Vehicles and the Infrastructure - Proceedings of DIVINE Special Session, 17th ARRB Conference: 1994

Translated English title: Ground Source Heat Pump System with Horizontal Spiral Heat Exchangers Serving an Elementary School, Erdgekoppelte Wärmepumpen Symposium: 17 October 1994, Justus-Leibig, Universität Giessen

CSCE Environmental Engineering Conference: 14 June 1994, Winnipeg, Manitoba

International Road Federation Conference and Exposition: 03 July 1994, Calgary, Alberta

Proceedings - Localized Damage: 01 June 1994, Udine, Italy

12th International Road Federation World Meeting: 1993, Madrid, Spain

Fifth Eurobitume Congress: 16 June 1993, Stockholm, Sweden

VI International Conference on Permafrost: 1993, Beijing, China

PICA - Paving in Cold Areas: 1993, Kananaskis, Alberta

CSCE Annual Conference: 08 June 1993, Fredericton, N.B., Canada

This report presents an assessment of the adequacy and suitability of existing technology, from the point of view of construction industry activity, in the repair and renovation of infrastructure facilities. Some technologies offer promising benefits but are not sufficiently well proven for general adoption by the industry, and some technologies are available in other countries but not well known in Canada. The final section of the report is a brief discussion of some related non-technical issues that impede the development and introduction of new technologies.

Canadian Society of Mechanical Engineers Conference: 01 June 1992, Montreal, Quebec, Canada

Proceedings of the 7th International Conference on Asphalt Pavements: 17 August 1992, Nottingham, U.K.

Present stripping mechanisms fail to specify the source of water necessary for stripping to start and progress with time. Finding the water source and route to the pavement interior is of great significance to efforts seeking a preventive measure against stripping. Investigation of the influence of construction-induced cracks, referred to as checking, on pavement resistance to stripping is reported. A new field-compaction technique was used to produce a crack-free, asphalt concrete surface that offered a much higher resistance to stripping than conventionally compacted surfaces. Cores recovered from field-compacted pavements were used throughout the investigation. The results of the experimental investigation indicated that compaction technique has a significant influence on the mix resistance to stripping. Vacuum saturation, used as part of the moisture conditioning procedure, has in the past obscured the influence of construction induced cracks on stripping susceptibility.

Al-Azhar Engineering Second International Conference: 21 December 1991, Cairo, Egypt

Annual Conference of the Canadian Society for Civil Engineering, 2nd Bi-annual Environmental Specialty Conference Engineering Materials Symposium Proceedings: 27 May 1992, Quebec City, Que., Canada

Proceedings of the Second International Conference on Computer-Aided Assessment and Localized Damage : Vol 1 : Fatigue and Fracture Mechanics: 01 July 1992, Southampton, U.K.

1992 Annual Conference of the Canadian Society for Civil Engineering, 2nd Bi-annual Environmental Specialty Conference Engineering Materials Symposium Proceedings: 27 May 1992, Quebec City, Quebec, Canada

Preview 2000 : Sixth Canadian Construction Congress: 05 December 1990, Toronto, Ont. Canada

Thermastock '91, 5th International Conference on Thermal Energy Storage, May 13, 1991, Scheveningen, The Netherlands

1991 Annual Conference of the Canadian Society for Civil Engineering: 29 May 1991, Vancouver, British Columbia

Proceedings on Ground-source Heat Pumps - Advancements Towards Cost Reduction: 1991-08, Montreal, Quebec, Canada

4th International Conference on Geotextiles, Geomembranes and Related Products, May 28, 1990, The Hague, Netherlands

Proceedings of the Thirty-Fifth Annual Conference of Canadian Asphalt Technical Association: 1990-11

Preview 2000, 6th Canadian Construction Congress: 05 December 1990

Mechanical Tests for Butuminous Mixes : Characterization, Design and Quality Control : Proceedings of the Fourth International Symposium: 23 October 1990, Budapest, Hungary

The heat and moisture transfer characteristics of a silt from the Mackenzie River Valley have been determined in a laboratory investigation. A dual gamma-ray scanner was used to measure the changes in density and volumetric moisture content along the soil samples. The coefficients of soil- water diffusivity under isothermal conditions and under temperature gradients have been obtained. The development of a calibration curve for the analysis of gamma-ray readings has been described. The shortcomings of the procedures used for the measurement of transport coefficients have been discussed.

International Symposium on Environmental Geotechnology: 1986-04, Allentown, PA

Proceedings of the Workshop on Ground Source Heat Pumps: 1986-10, Albany, NY

Jigastock 88 : Proceedings, 4th International Conference on Energy Storage for Building Heating and Cooling: 1988-10, Versailles, France