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This was achieved by the use of Nondestructive Testing Methods (NDT) and backcalculation techniques. This study involved the determination of the structural layer properties of aggregate and asphalt surfaced pavements for use in the evaluation of pavement load carrying capacity and the seasonal effects of moisture. Categories: Pavements Nondestructive Testing of Pavements and Backcalculation of Moduli These technologies are also reviewed in this report. New technologies (e.g., ground-penetrating radar, infrared thermography) are developing which have potential for use in pavement evaluation. The recommended evaluation procedure relies on conventional testing and evaluation methods (visual surveying, deflection testing, coring, materials testing, etc.). A procedure was developed for backcalculation of AC/PCC pavement layer elastic moduli from deflection measurements, and guidelines were developed for practical interpretation of the backcalculation results. The project-level evaluation procedure includes guidelines for field and laboratory data collection and analysis for structural evaluation, functional evaluation, drainage evaluation, and AC surface material evaluation.
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Critical levels for these indicators were identified, and available prediction models were investigated for use in rehabilitation programming. Key condition indicators (distress, rutting, roughness, serviceability, and CRS) were examined to address their usefulness in AC/PCC rehabilitation project selection. This report presents guidelines for selection of asphalt-overlaid concrete (AC/PCC) pavements for rehabilitation, collection of distress data, recognition of AC/PCC pavement distress modes, nondestructive deflection testing, materials sampling, and overall project-level evaluation. This report presents guidelines for selection of asphalt-overlaid concrete (AC/PCC) pavements for rehabilitation, collection of distress data, recognition of AC/PCC pavement distress modes, nondestructive deflection testing, materials. Annotation copyright by Book News, Inc., Portland, OR Categories: Electronic book Guidelines for Evaluation of Asphalt overlaid Concrete Pavements Also includes a history of the quest for a standard and the status of that effort. The 29 papers discuss analytical models and techniques, measurement and calculation techniques in the field and laboratory, problems and errors associated with backcalculation methods and design parameters, and testing for other pavement uses. The proceedings of June 1993 international symposium held in Atlanta, Georgia, called specifically to develop and standardized evaluation procedures for non-destructive methods of testing pavements. Subcommittee D-4 on Road and Paving Materials
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Most existing methods predict only elastic layer moduli, but quite often the layer Associate Professor, .Īuthor: ASTM Committee D-18 on Soil and Rock. KEYWORDS: backcalculation, pavement evaluation, elastic layer, Newton method, gradient method, stiff layer, MICHBACK, EVERCALC.