AN EVALUATION OF THE MOISTURE AND DENSITY ROAD LOGGER UNIT

THE CONSTRUCTION CONTROL CAPABILITIES OF THE ROAD LOGGER AND THE FEASIBILITY OF USING THIS EQUIPMENT TO FIELD CALIBRATE THE SMALLER, PORTABLE TYPE NUCLEAR DENSITY GAGES BEING USED ON A LIMITED BASIS BY THE TEXAS HIGHWAY DEPARTMENT ARE BEING STUDIED. THE RESULTS OF THE CORRELATION STUDY INDICATED REASONABLY GOOD CORRELATION BETWEEN THE ROAD LOGGER AND CONVENTIONAL MEASUREMENTS OF MOISTURE CONTENT AND WET DENSITY, HOWEVER, IN MOST CASES, THE ROAD LOGGER VALUES EXCEEDED THOSE OF THE CONVENTIONAL TESTS. IN THE MORE UNIFORM BASE MATERIALS THAT WERE TESTED, SUBSTANTIAL AGREEMENT OF DRY DENSITY VALUES COULD BE OBTAINED BY APPLYING A CORRECTION FACTOR TO THE ROAD LOGGER MEASUREMENTS OF MOISTURE CONTENT. EVEN THOUGH CORRELATION TO SOME EXTENT WAS OBTAINED BETWEEN COUNT-RATIO OF THE PORTABLE NUCLEAR GAGE AND ROAD LOGGER WET DENSITY, THIS METHOD OF CALIBRATION WAS ONLY PARTIALLY SUCCESSFUL. DIFFERENCES IN SAMPLE SIZE ACTUALLY INVESTIGATED AND VARIATIONS OF WET DENSITY IN THE COMPACTED MATERIALS APPARENTLY CONTRIBUTED TO THE OBSERVED SPREAD IN TEST RESULTS. THIS SPREAD IN TEST RESULTS MADE IT DIFFICULT TO ESTABLISH ACCURATE REFERENCE CURVES FOR USE WITH THE SMALLER GAGES.

• Supplemental Notes:
  • Research RePORT 37-1,31 PP
• Corporate Authors:

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701
• Authors:
  • Bingham, J M
  • White, J R
• Publication Date: 1965-10

Subject/Index Terms

• TRT Terms: Calibration; Construction management; Correlation analysis; Curves (Geometry); Field tests; Moisture content; Nuclear tests; Recording instruments; Statistical sampling; Swelling index; Values in measurement; Wet density
• Uncontrolled Terms: Correction (Mathematics); Sample size
• Old TRIS Terms: Construction control; Field check; Nuclear moisture-density determinations
• Subject Areas: Construction; Data and Information Technology; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216231
• Record Type: Publication
• Files: TRIS, STATEDOT
• Created Date: Jan 16 1994 12:00AM