00739781

Component

https://doi.org/10.3141/1568-14

http://scholar.google.com...+Kim&publication_year=1997

Surface deflection measurements and backcalculation of layer moduli in flexible pavements are significantly affected by the temperature of the asphalt concrete (AC) layer. Correction of deflections or backcalculated moduli to a reference temperature requires determination of an effective temperature of the AC layer. For routine deflection testing and analysis in state highway agencies, it is preferable, from a practical point of view, to use a nondestructive prediction method for determining the effective AC layer temperature instead of measuring the temperature directly from a small hole drilled into the AC layer. A simplified procedure to predict asphalt pavement subsurface temperatures is presented. The procedure is based on fundamental principles of heat transfer and uses the surface temperature history since yesterday morning to predict the AC layer mid-depth temperature at the time of falling weight deflectometer (FWD) testing today. The surface temperature history is determined using yesterday's maximum air temperature and cloud condition, the minimum air temperature of today's morning, and surface temperatures measured during FWD tests. FWD tests and temperature measurements have been conducted on seven pavement sections with varying structural designs located in three different climatic regions of North Carolina. The field temperature records from these pavements have provided values of pavement thermal parameters and coefficients in temperature functions that are needed in the prediction procedure. A set of verification results are presented using examples with different climatic regions, changing AC layer thicknesses, and varying weather patterns in different seasons.

This paper appears in Transportation Research Record No. 1568, Pavement Rehabilitation and Design.

English

p. 114-123

1997

Transportation Research Record

0309059747

Figures (8) ; References (7) ; Tables (2)

Asphalt pavements; Climate; Deflection tests; Falling weight deflectometers; Field studies; Forecasting; Heat transfer; Theory; Thickness; Validation; Weather conditions

Subsurface temperature

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

TRIS, TRB

Aug 27 1997 12:00AM

• COMPATIBLE APPROACH TO CONCRETE STRENGTH CHARACTERIZATION IN THE DESIGN AND CONSTRUCTION OF CONCRETE PAVEMENTS
• DETECTING STRIPPING IN ASPHALT CONCRETE LAYERS USING GROUND PENETRATING RADAR
• DEVELOPMENT OF A ROLLER-COMPACTED CONCRETE PAVEMENT CRACK AND JOINT SPACING MODEL
• EARLY AGE PERFORMANCE OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENT WITH DIFFERENT TYPES OF AGGREGATE
• EFFECT OF NONLINEAR TEMPERATURE GRADIENT ON CURLING STRESS IN CONCRETE PAVEMENTS
• ELASTIC PAVEMENT ANALYSIS USING INFINITE ELEMENTS
• FINITE-ELEMENT ANALYSIS OF PORTLAND CEMENT CONCRETE PAVEMENTS WITH CRACKS
• FLEXIBLE PAVEMENT OVERLAYS: THE STATE EXPERIENCE
• FRACTURE MECHANICS IN PAVEMENT ENGINEERING: THE SPECIMEN-SIZE EFFECT
• IMPLEMENTATION FEASIBILITY OF ASPHALT CONCRETE-OVERLAID PORTLAND CEMENT CONCRETE PAVEMENT REHABILITATION GUIDELINES
• IMPROVED METHODOLOGY FOR DEVELOPING A LONG-RANGE PAVEMENT REHABILITATION PROGRAM
• IN SITU EVALUATION OF FATIGUE DAMAGE GROWTH AND HEALING OF ASPHALT CONCRETE PAVEMENTS USING STRESS WAVE METHOD
• INNOVATIVE APPROACH TO FATIGUE CRACK PROPAGATION IN CONCRETE PAVEMENTS
• LABORATORY AND FIELD MOISTURE CONDITIONS FOR FLEXIBLE PAVEMENT
• MODIFIED PORTLAND CEMENT ASSOCIATION STRESS ANALYSIS AND THICKNESS DESIGN PROCEDURES
• NEURAL NETWORK ALGORITHMS FOR THE CORRECTION OF CONCRETE SLAB STRESSES FROM LINEAR ELASTIC LAYERED PROGRAMS
• PERFORMANCE OF A REHABILITATED D-CRACKED JOINTED PLAIN CONCRETE AIRFIELD PAVEMENT
• RELIABILITY DESIGN OF FLEXIBLE AIRFIELD PAVEMENTS: ELASTIC LAYERED METHOD
• STRUCTURAL EVALUATION AND ANALYSIS OF INSTRUMENTED IN-SERVICE CONCRETE PAVEMENTS SUBJECTED TO HEAVY DYNAMIC LOADS
• TECHNIQUES FOR SELECTING PAVEMENT REHABILITATION STRATEGIES: PENNSYLVANIA CASE STUDIES