01598252

Monograph

http://www.trb.org/Main/Blurbs/173642.aspx

This project involved the development of an acoustic emission-based Asphalt Embrittlement Analyzer (AEA) device as an advanced diagnostic tool to assess the degree of aging, crack resistance, and resiliency of near-surface properties in asphalt pavements. A sophisticated computer code was developed to analyze acoustic emission (AE) signals, to identify microcrack presence and location, and to produce a diagnostic schematic illustrating embrittlement temperature versus location (depth from surface of pavement). The AEA test offers: simplicity and portability; the ability to characterize the continuous and rapid change in surface properties as a function of depth from the surface; suitability for characterization of both binders and mixtures; relative insensitivity to sample size and fracture size effect; relative insensitivity to sample geometry; and suitability for determining the optimum timing and method(s) for preventive maintenance and rehabilitation. In addition, as a design tool, the AEA can be used to assess the effectiveness and proper use of rejuvenators in achieving the goal of restoring the pavement surface to a crack-resistant state.

This NCHRP-IDEA investigation was conducted by the University of Illinois at Urban-Champaign.

NCHRP IDEA Project 170

English

35p

2015-7

NCHRP-IDEA Program Project Final Report

Final Report

Print

Figures; Photos; References; Tables

Acoustic emission tests; Aging (Materials); Asphalt pavements; Cracking; Embrittlement; Implementation; Product development; Resilience (Materials); Testing equipment

Highways; Materials; Pavements

TRIS, TRB, ATRI

Apr 29 2016 10:32AM