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Title: Cost-Effectiveness and Performance of Overlay Systems in Illinois Volume 1: Effectiveness Assessment of HMA Overlay Interlayer Systems Used to Retard Reflective Cracking
Author(s): Al-Qadi, Imad L.; Buttlar, William; Baek, Jongeun; Kim, Minkyum
Subject(s): reflective cracking
crack control
interlayer
HMA overlay
Abstract: This project evaluated the ability of interlayer systems used in HMA overlays to retard reflective cracking. Field crack surveys and forensic investigation, including video imaging and ground penetrating radar surveys as well as laboratory testing of cored specimens, were conducted to examine the behavior of reflective cracking and reflective cracking control systems applied in Illinois. Crack extent and severity were recorded at 24 locations across Illinois. The performance evaluation focused on five types of interlayer systems: area- and strip-type nonwoven fabric; two strip-type composite; and a fine, high polymer content HMA interlayer system. Two reflective cracking indices were developed to characterize the condition of HMA overlays regarding reflective cracking as well as transverse cracking. In addition, a performance benefit ratio parameter, PBR, was developed to assess the performance of treated pavements relative to control sections. The study provided a quantitative assessment for various types of reflective cracking interlayer systems. In addition, it provides a means to predict the performance of several interlayer systems under various vehicular and environmental loading conditions through a simple ESALs-TL chart. A companion report (volume 2) provides tools for the selection of appropriate reflective crack control treatments based upon traffic, climate, and life cycle costs using a user-friendly life cycle cost analysis program (CIND – Cost-effective INnterlayer system Decision program).
Issue Date: 2009-05
Publisher: Illinois Center for Transportation (ICT)
Series/Report: FHWA-ICT-09-044
Genre: Technical Report
Type: Text
Language: English
URI: http://hdl.handle.net/2142/14260
Publication Status: published or submitted for publication
Peer Reviewed: is peer reviewed
Sponsor: ICT-R58
Date Available in IDEALS: 2009-11-18


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