University of Illinois Urbana-Champaign

Assessment of the Impact of Unacceptable Hot-Mix Asphalt Test Parameters

Hajj, Ramez; Lu, Yuija

Content Files
FHWA-ICT-24-010.pdf

Permalink

https://hdl.handle.net/2142/122996

Description

Title
Assessment of the Impact of Unacceptable Hot-Mix Asphalt Test Parameters
Author(s)
  • Hajj, Ramez
  • Lu, Yuija
Issue Date
2024-05
Keyword(s)
  • Quality Assurance
  • Hot-Mix Asphalt
  • Construction
  • Pay Factors
Date of Ingest
2024-05-14T09:58:52-05:00
Abstract
According to the current standard specifications and special provisions within the Illinois Department of Transportation, four quality assurance (QA) parameters are used to assess acceptability to remain in place for hot-mix asphalt (HMA) construction projects. However, when these parameters fall outside acceptable limits, it is not clear what impact this has on the pavement service life. This report, therefore, conducted a thorough literature review of studies on QA parameters and their effects on pavement service life and studied the standard specifications of each state to determine what their current practice is in terms of percent within limits (PWL) specifications. The conclusions of this task indicated that most states use some combination of gradation, density, air voids, asphalt binder content, and volumetric asphalt film-related parameters to assess the performance of contractors. Furthermore, the research team conducted an initial review of 10 recent IDOT projects and examined pavement condition indices for three others to determine what impact, locally, unacceptable materials have on initial pavement performance. Low density showed a consistently substantial relationship to premature rutting and increased International Roughness Index. For other parameters, the findings were mixed based on data available, as some projects did show initial performance effects of unacceptable sublots while others did not show any relationship to initial performance. Finally, the research team presented recommendations for future studies considering that this research did not evaluate performance of outside acceptable limits cases over the entire life span of HMA construction projects.
Publisher
Illinois Center for Transportation/Illinois Department of Transportation
Has Part
  • https://doi.org/10.36501/0197-9191/24-012
  • ISSN: 0197-9191
Series/Report Name or Number
FHWA-ICT-24-010
Type of Resource
text
Genre of Resource
technical report
Language
eng
Sponsor(s)/Grant Number(s)
IDOT-R27-SP59
Copyright and License Information
No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161.

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Research and Publications - Illinois Center for Transportation PRIMARY