Statistical Evaluation of Nuclear Density Gauges Under Field Conditions
Author | : Mary Stroup-Gardiner |
Publisher | : |
Total Pages | : 62 |
Release | : 1988 |
Genre | : Pavements, Asphalt |
ISBN | : |
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Author | : Mary Stroup-Gardiner |
Publisher | : |
Total Pages | : 62 |
Release | : 1988 |
Genre | : Pavements, Asphalt |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 98 |
Release | : 2007 |
Genre | : Asphalt |
ISBN | : |
Density is an important component of hot-mix asphalt (HMA) pavement quality and long-term performance. Insufficient density of an in-place HMA pavement is the most frequently cited construction-related performance problem. This study evaluated the use of electromagnetic gauges to nondestructively determine densities. Field and laboratory measurements were taken with two electromagnetic gauges-a PaveTracker and a Pavement Quality Indicator (PQ1). Test data were collected in the field during and after paving operations and also in laboratory on field mixes compacted in the lab. This study revealed that several mix-and project-specific factors affect electromagnetic gauge readings. Consequently, the implementation of these gauges will likely need to be done utilizing a test strip on a project- and mix-specific basis to appropriately identify an adjustment factor for the specific electromagnetic gauge being used for quality control and quality assurance (QC/QA) testing. The substantial reduction in testing time that results from employing electromagnetic gauges rather than coring makes it possible for more readings to be used in the QC/QA process with real-time information without increasing the testing costs.
Author | : Missouri. Highway and Transportation Department. Division of Materials and Research |
Publisher | : |
Total Pages | : 36 |
Release | : 1990 |
Genre | : Radioactive gages |
ISBN | : |
Author | : Stephen Michael Schoenfelder |
Publisher | : |
Total Pages | : 208 |
Release | : 2001 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 25 |
Release | : 1990 |
Genre | : Pavements, Asphalt |
ISBN | : |
This report describes the results of a research study to determine the effectiveness of the Troxler Model 4640 Thin Lift Nuclear Density Gauge. The densities obtained from cores and the nuclear density gauge from seven construction projects were compared. The projects were either newly constructed or under construction when the tests were performed. A linear regression technique was used to investigate how well the core densities could be predicted from nuclear densities. Correlation coefficients were determined to indicate the degree of correlation between the core and nuclear densities. Using a statistical analysis technique, the range of the mean difference between core and nuclear measurements was established for specified confidence levels for each project.
Author | : Missouri. State Highway Department |
Publisher | : |
Total Pages | : 36 |
Release | : 1975 |
Genre | : |
ISBN | : |
Author | : James P. Reidy |
Publisher | : |
Total Pages | : 26 |
Release | : 1989 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
Author | : National Research Council (U.S.). Transportation Research Board |
Publisher | : |
Total Pages | : 766 |
Release | : 1988 |
Genre | : Express highways |
ISBN | : 9780309047111 |