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• 2008377802 abstract "The Quality Management Earthwork (QM-E) special provision was implemented on a pilot project to evaluate quality control (QC) and quality assurance (QA) testing in predominately unsuitable soils. Control limits implemented on this pilot project included the following: 95% relative compaction, moisture content not exceeding +/- 2% of optimum moisture content, soil strength not exceeding a dynamic cone penetrometer (DCP) index of 70 mm/blow, vertical uniformity not exceeding a variation in DCP index of 40 mm/blow, and lift thickness not exceeding depth determined through construction of control strips. Four-point moving averages were used to allow for some variability in the measured parameter values. Management of the QC/QA data proved to be one of the most challenging aspects of the pilot project. Implementing use of the G-RAD data collection system has considerable potential to reduce the time required to develop and maintain QC/QA records for projects using the QM-E special provision. In many cases, results of a single Proctor test were used to establish control limits that were used for several months without retesting. While the data collected for the pilot project indicated that the DCP index control limits could be set more tightly, there is not enough evidence to support making a change. In situ borings, sampling, and testing in natural unsuitable cut material and compacted fill material revealed that the compacted fill had similar strength characteristics to that of the natural cut material after less than three months from the start of construction.".
• 2008377802 contributor B11225486.
• 2008377802 contributor B11225487.
• 2008377802 contributor B11225488.
• 2008377802 created "2007.".
• 2008377802 date "2007".
• 2008377802 date "2007.".
• 2008377802 dateCopyrighted "2007.".
• 2008377802 description "Final report.".
• 2008377802 description "Includes bibliographical references (p. 78).".
• 2008377802 description "Performed by Iowa State University, Dept. of Civil, Construction and Environmental Engineering and sponsored by the Iowa Department of Transportation and the Iowa Highway Research Board. Iowa DOT project TR-492. CTRE project 03-136.".
• 2008377802 description "The Quality Management Earthwork (QM-E) special provision was implemented on a pilot project to evaluate quality control (QC) and quality assurance (QA) testing in predominately unsuitable soils. Control limits implemented on this pilot project included the following: 95% relative compaction, moisture content not exceeding +/- 2% of optimum moisture content, soil strength not exceeding a dynamic cone penetrometer (DCP) index of 70 mm/blow, vertical uniformity not exceeding a variation in DCP index of 40 mm/blow, and lift thickness not exceeding depth determined through construction of control strips. Four-point moving averages were used to allow for some variability in the measured parameter values. Management of the QC/QA data proved to be one of the most challenging aspects of the pilot project. Implementing use of the G-RAD data collection system has considerable potential to reduce the time required to develop and maintain QC/QA records for projects using the QM-E special provision. In many cases, results of a single Proctor test were used to establish control limits that were used for several months without retesting. While the data collected for the pilot project indicated that the DCP index control limits could be set more tightly, there is not enough evidence to support making a change. In situ borings, sampling, and testing in natural unsuitable cut material and compacted fill material revealed that the compacted fill had similar strength characteristics to that of the natural cut material after less than three months from the start of construction.".
• 2008377802 extent "164 p. . in various pagings :".
• 2008377802 hasFormat "Also available via the Internet.".
• 2008377802 identifier tr492%20Final.pdf.
• 2008377802 isFormatOf "Also available via the Internet.".
• 2008377802 issued "2007".
• 2008377802 issued "2007.".
• 2008377802 language "eng".
• 2008377802 publisher "Ames, Iowa : Center for Transportation Research and Education, Iowa State University,".
• 2008377802 relation "Also available via the Internet.".
• 2008377802 spatial "Iowa".
• 2008377802 subject "625.7/32 22".
• 2008377802 subject "Earthwork. trt".
• 2008377802 subject "Embankments Iowa Design and construction Quality control.".
• 2008377802 subject "Quality control. trt".
• 2008377802 subject "Roads Iowa Embankments Quality control.".
• 2008377802 subject "Soil test. trt".
• 2008377802 subject "Soils Testing.".
• 2008377802 subject "TE210.8 .W493 2007".
• 2008377802 title "Embankment quality phase IV : application to unsuitable soils / David J. White ... [et al.].".
• 2008377802 type "text".