Quality Assurance of Hot-Mix Asphalt: Comparison of Contractor Quality Control and Georgia Department of Transportation Data
Quality assurance is the process by which highway construction elements are sampled and tested to ensure compliance with specifications and other project requirements. The results of contractor-performed tests, originally performed for quality control purposes, are increasingly used in the acceptance decision in many states. The Georgia Department of Transportation (GDOT) uses contractor-performed tests in the acceptance decision on acceptable corroboration of GDOT-performed tests. Statistical analyses were performed to assess differences between tests conducted on hot-mix asphalt concrete by GDOT and its contractors during the 2003 construction season. Measurements of gradation and asphalt content taken by both parties were compared both across all projects and on a project-by-project basis for projects large enough to meet sample size requirements for this type of analysis. Both tabular and graphic representations of data are used to interpret the results. Statistically significant differences occur in some cases; these differences are much more common when comparing variability of these measurements than with the means. At the project level, on most projects in which statistically significant differences occur, the GDOT value typically is larger.
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/158001.aspx
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Authors:
- Turochy, Rod E
- Willis, James Richard
- Parker, Frazier
- Publication Date: 2006
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 47-54
- Monograph Title: Construction 2006
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 1946
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Acceptance tests; Aggregate gradation; Asphalt content; Contractors; Hot mix asphalt; Quality assurance; Quality control; Road construction; Statistical analysis
- Identifier Terms: Georgia Department of Transportation
- Uncontrolled Terms: Testing variability
- Subject Areas: Construction; Data and Information Technology; Highways; Materials; I31: Bituminous Binders and Materials; I50: Construction and Supervision of Construction;
Filing Info
- Accession Number: 01023488
- Record Type: Publication
- ISBN: 0309099544
- Files: TRIS, TRB, ATRI
- Created Date: Apr 28 2006 8:11AM