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

Hajj, Ramez; Lu, Yuija

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

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

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

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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