Title: Ranking System to Select Non-destructive Technologies for Asphalt Pavement Compaction
Abstract: The purpose of this paper is to provide guidance to state highway agencies (SHA) and contractors for selecting non-destructive testing (NDT) technologies to evaluate critical characteristics of asphalt pavements during compaction. With numerous NDT technologies now capable of measuring asphalt pavement characteristics during compaction, a systematic process is presented for defining critical characteristics, breaking down the attributes associated with NDT technologies, then ranking and selecting technologies. Critical characteristics during asphalt compaction are reported from a 12-state survey, in rank order, as mix segregation, in-place compaction, smoothness, temperature segregation, layer thickness, layer bond, and pavement modulus. Technologies available to measure one or more of these characteristics include deflectometers, ground penetration radar, impact echo, ultrasonic pulse velocity, infrared thermography, intelligent compactors, lasers, non-nuclear density gauges, permeameters, and ultrasonic seismic devices. Each technology is broken down for 12 unique attributes including operational principle, measures and indicators, test equipment, test portability, complexity of execution in the field, time to conduct each test, environmental limitations, reliability of collected data, committee-approved test protocols, degree of training required, and cost. A quantitative ranking system determines the most appropriate NDT technologies for field adoption using the ability to make real-time corrective actions and a weighting technique for scoring parameters. An NDT technology selection is demonstrated uniquely for one SHA to measure pre-defined critical characteristics of in-place compaction, thermal segregation, and modulus using three NDT technologies: infrared thermography, ground penetrating radar, and the portable seismic pavement analyzer.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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Cited By Count: 1
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