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- 2009437541 abstract "This research project addresses the opportunity to contain the escalating costs of concrete materials in construction projects. Both statistical process control and rational acceptance criteria show that quality improvement and cost savings can be achieved. The report presents a comprehensive statistical evaluation of the compressive strength of concrete used in various sectors of the transportation infrastructure in Arizona. The proposed methodology is applicable to the concrete materials specified at other industrial sectors such as privately financed construction projects. Several case studies are conducted based on actual field data to show that performance based specification procedures can be used to improve the quality control process while decreasing the overall construction costs. Three sets of compressive data from various construction projects were selected. These data were evaluated by means of statistical process-control tools while state-of-the art procedures were utilized to evaluate the strength as a measure of quality. Several acceptance criteria based on the percent within limit (PWL) and operational-characteristic curves (OC) are proposed and evaluated. Various pay factor equations are considered and the historical records are evaluated based on hypothetical pay factor equations. The report furthermore addresses the strengths and weaknesses associated with the present acceptance criteria in comparison to a PWL based method. Opportunities in sampling, optimization, operational-characteristics curves, and quality specification are discussed in detail. It is shown that the cost savings associated with both performance based-specification and quality control, sufficiently justify the amount of effort needed in order to implement these methodologies in the development of specifications.".
- 2009437541 contributor B11610108.
- 2009437541 contributor B11610109.
- 2009437541 contributor B11610110.
- 2009437541 created "[2008].".
- 2009437541 date "2008".
- 2009437541 date "[2008].".
- 2009437541 dateCopyrighted "[2008].".
- 2009437541 description "Final report. Sept. 2006-Nov. 2007.".
- 2009437541 description "Includes bibliographical references (p. 91-92).".
- 2009437541 description "Sponsored by the Arizona Dept. of Transportation in cooperation with the Federal Highway Administration SPR-PL-1(69)608.".
- 2009437541 description "This research project addresses the opportunity to contain the escalating costs of concrete materials in construction projects. Both statistical process control and rational acceptance criteria show that quality improvement and cost savings can be achieved. The report presents a comprehensive statistical evaluation of the compressive strength of concrete used in various sectors of the transportation infrastructure in Arizona. The proposed methodology is applicable to the concrete materials specified at other industrial sectors such as privately financed construction projects. Several case studies are conducted based on actual field data to show that performance based specification procedures can be used to improve the quality control process while decreasing the overall construction costs. Three sets of compressive data from various construction projects were selected. These data were evaluated by means of statistical process-control tools while state-of-the art procedures were utilized to evaluate the strength as a measure of quality. Several acceptance criteria based on the percent within limit (PWL) and operational-characteristic curves (OC) are proposed and evaluated. Various pay factor equations are considered and the historical records are evaluated based on hypothetical pay factor equations. The report furthermore addresses the strengths and weaknesses associated with the present acceptance criteria in comparison to a PWL based method. Opportunities in sampling, optimization, operational-characteristics curves, and quality specification are discussed in detail. It is shown that the cost savings associated with both performance based-specification and quality control, sufficiently justify the amount of effort needed in order to implement these methodologies in the development of specifications.".
- 2009437541 extent "92 p. :".
- 2009437541 hasFormat "Also available online.".
- 2009437541 identifier AZ608.pdf.
- 2009437541 isFormatOf "Also available online.".
- 2009437541 isPartOf "Final report (Arizona. Department of Transportation) ; 608.".
- 2009437541 isPartOf "Final report ; 608".
- 2009437541 issued "2008".
- 2009437541 issued "[2008].".
- 2009437541 language "eng".
- 2009437541 publisher "Phoenix, Ariz. : Arizona Dept. of Transportation,".
- 2009437541 relation "Also available online.".
- 2009437541 subject "Asphalt concrete Specifications.".
- 2009437541 subject "Pavements, Asphalt concrete Design and construction.".
- 2009437541 subject "Pavements, Asphalt concrete Testing.".
- 2009437541 subject "Roads Design and construction Quality control.".
- 2009437541 subject "TE270 .L32 2008".
- 2009437541 title "Development of rational pay factors based on concrete compressive strength data / prepared by Busaba Laungrungrong, Barzin Mobasher, Douglas Montgomery.".
- 2009437541 type "text".