THE THERMAL ENVIRONMENT AND ITS EFFECTS ON ROAD PAVEMENTS
Some of the influences of the thermal environment of pavements and the factors that affect the establishment of a thermal regime in the layers of the pavement are discussed. Also discussed are the basic principles of heat transfer, and the thermal, thermophysical and thermostructural properties of the materials used. Methods of measuring pavement temperatures and the fundamental problems involved are described. Details are given of current methods used for simulating pavement temperatures and the methods used in South Africa for measuring temperature at the pavement surface and at depth. The engineering significance of environmental variables and the effects of environment on land-associated pavement response are outlined. Ways of modifying the thermal regime in pavements are discussed. A systems approach to environmental problems in pavement design is described in detail. Also a mathematical model is developed which can simulate, for South African conditions, the temperatures likely to be involved when designing a pavement. The model can be used to calculate thermal stress, viscelastic stiffness, Traffic-weighted mean stiffness and load-associated stress, strain and deflection. /Author/
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Corporate Authors:
National Institute for Transport & Rd Res, S Afr
P.O. Box 395
Pretoria, Transvaal, South Africa -
Authors:
- Williamson, R H
- Publication Date: 1976
Media Info
- Features: Figures; References; Tables;
- Pagination: 75 p.
Subject/Index Terms
- TRT Terms: Deflection; Heat; Heat transfer; Loads; Mathematical models; Pavement design; Pavement layers; Pavements; Simulation; Strain (Mechanics); Temperature; Thermal stresses; Viscoelasticity
- Old TRIS Terms: Highway pavement; Pavement deflection; Response; Strains; Thermal conditions
- Subject Areas: Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00165491
- Record Type: Publication
- Report/Paper Numbers: Bulletin 12
- Files: TRIS, ATRI
- Created Date: Dec 27 1977 12:00AM