00798886

Component

https://doi.org/10.3141/1699-19

http://scholar.google.com...sson&publication_year=2000

A simulation model has been developed to calculate the temperatures of asphalt concrete during summer. Input data to the simulation model are hourly values for solar radiation, air temperature, and wind velocity. Longwave radiation incident to and outgoing from the pavement surface is calculated from the air and pavement surface temperatures, respectively. The portion of the incident shortwave radiation absorbed by the pavement surface is calculated from the albedo of the surface. By means of a finite difference approximation of the heat transfer equation, the temperatures are calculated under the surface. Apart from radiation and heat transfer, convection losses from the pavement surface are also calculated depending on wind velocity, air temperature, and surface temperature. The formulas used for the calculation of radiation and the simulation model as a whole are validated by comparison with measurements, showing good agreement. A method for the calculation of direct solar radiation from a clear sky, at an arbitrary location and time, is used to create input data to the simulation model in order to calculate maximum pavement temperatures. The formulas used with Superpave to calculate maximum pavement temperatures are based on the assumption that there is an equilibrium when a maximum temperature is reached. Such an equilibrium assumption can be strongly questioned, and its consequences are discussed.

This paper appears in Transportation Research Record No. 1699, Pavement Management and Monitoring.

English

p. 134-141

2000

Transportation Research Record

0309066778

Figures (9) ; References (9) ; Tables (2)

Approximation (Mathematics); Asphalt concrete pavements; Atmospheric temperature; Calculation; Equations; Finite differences; Heat transfer; Measurement; Simulation; Solar radiation; Summer; Temperature; Validation; Velocity; Wind

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Sep 8 2000 12:00AM

• ACCURACY OF WEATHER DATA IN LONG-TERM PAVEMENT PERFORMANCE PROGRAM DATABASE
• APPLYING ECONOMIC CONCEPTS FROM LIFE-CYCLE COST ANALYSIS TO PAVEMENT MANAGEMENT ANALYSIS
• ARTIFICIAL NEURAL NETWORK FOR ENHANCING SELECTION OF PAVEMENT MAINTENANCE STRATEGY
• DEVELOPING A QUANTITATIVE RATING SYSTEM FOR CONTINUOUSLY REINFORCED CONCRETE PAVEMENT
• DEVELOPMENT OF PAVEMENT TYPE EVALUATION PROCEDURE FOR TEXAS DEPARTMENT OF TRANSPORTATION
• EARLY EVALUATION OF LONG-TERM PAVEMENT PERFORMANCE SPECIFIC PAVEMENT STUDIES-2, COLORADO
• EVALUATION OF ACCURACY OF SURFACE PROFILERS
• EVALUATION OF RELATIONSHIP BETWEEN PROFILOGRAPH AND PROFILE-BASED ROUGHNESS INDEXES
• FORECASTING OF PAVEMENT CRACK PERFORMANCE WITH ADAPTIVE FILTER MODEL
• INCORPORATING ROAD SAFETY INTO PAVEMENT MANAGEMENT
• INVESTIGATION OF RELATIONSHIP BETWEEN ROUGHNESS AND PAVEMENT SURFACE DISTRESS BASED ON WESTRACK PROJECT
• LABORATORY CALIBRATION AND IN SITU MEASUREMENTS OF MOISTURE BY USING TIME-DOMAIN REFLECTOMETRY PROBES
• MECHANISTIC ROUGHNESS MODEL BASED ON VEHICLE-PAVEMENT INTERACTION
• PLANNING AND IMPLEMENTATION OF A MANAGEMENT SYSTEM FOR UTILITY CUTS
• PROPOSED PAVEMENT PERFORMANCE MODELS FOR LOCAL GOVERNMENT AGENCIES IN MICHIGAN
• PUBLIC PERCEPTIONS OF WISCONSIN PAVEMENTS AND TRADE-OFFS IN PAVEMENT IMPROVEMENT
• ROAD USER COST MODELS FOR NETWORK-LEVEL PAVEMENT MANAGEMENT
• SOLUTION OF PAVEMENT DETERIORATION EQUATIONS BY GENETIC ALGORITHMS
• STRUCTURED APPROACH TO MANAGING QUALITY OF PAVEMENT DISTRESS DATA: VIRGINIA DEPARTMENT OF TRANSPORTATION EXPERIENCE
• USING DURATION MODELS TO ANALYZE EXPERIMENTAL PAVEMENT FAILURE DATA
• USING PAVEMENT MANAGEMENT SYSTEM CONCEPTS TO DETERMINE THE COST AND IMPACT OF UTILITY TRENCHING ON AN URBAN ROAD NETWORK