EVALUATION OF A THIN-LIFT NUCLEAR DENSITY GAUGE

This paper describes the results of a research study to determine the effectiveness of the Troxler Model 4640 thin-lift nuclear density gauge in estimating core densities. The study consisted of obtaining density measurements using cores and the nuclear gauge on seven construction projects and comparing the nuclear to core density readings. The projects were either newly constructed or under construction when the tests were performed. Correlation coefficients were determined to indicate the degree of correlation between core and nuclear densities. Linear regression was used to investigate how well the core densities could be predicted from nuclear densities. Using statistical analysis, the ranges of differences between core and nuclear measurements were established for specified confidence levels. Analysis of the data shows that the accuracy of the nuclear gauge is highly material-dependent: The gauge produced acceptable results with limestone mixtures, but it did not perform satisfactorily with mixtures containing siliceous aggregate. The data presented in this paper indicate that the gauge could be used as a quality control tool, provided calibration lines are developed for each project; calibration lines can be developed using simple linear regression.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1989/1217/1217-002.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=EVALUATION+OF+A+THIN-LIFT+NUCLEAR+DENSITY+GAUGE&author=T.+Kennedy&author=M.+Tahmoressi&author=M.+Solaimanian&publication_year=1989
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  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309048117
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1217, Asphalt Construction, Premature Rutting, and Surface Friction Courses. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Kennedy, Thomas W
  • Tahmoressi, Maghsoud
  • Solaimanian, Mansour
• Publication Date: 1989

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 9-19
• Monograph Title: Asphalt construction, premature rutting, and surface friction courses
• Serial:
  • Transportation Research Record
  • Issue Number: 1217
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Aggregates; Core samples; Correlation analysis; Density; Estimating; Limestone aggregates; Linear regression analysis; Measurement; Nuclear gauges; Quality control; Silica stone; Statistical analysis
• Uncontrolled Terms: Siliceous aggregates
• Old TRIS Terms: Core density; Density measurement
• Subject Areas: Construction; Data and Information Technology; Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00492069
• Record Type: Publication
• ISBN: 0309048117
• Files: TRIS, TRB, ATRI
• Created Date: Mar 31 1990 12:00AM