DEVELOPMENT OF INSTRUMENTATION FOR MEASURING LENGTH OF CONCRETE CORES

SEVERAL DESIGNS, ELECTRICAL, MECHANICAL, AND HYDRAULIC WERE CONSIDERED. THE MOST PRACTICAL APPROACH APPEARED TO BE A COMBINATION INVOLVING A MECHANICAL HYDRAULIC SYSTEM USING NINE HYDRAULIC CYLINDERS AS MEASUREMENT PROBES. THE NINE PROBES DISPLACE HYDRAULIC FLUID INTO A CALIBRATED READOUT CYLINDER WHOSE MOVEMENT IS READ AS THE AVERAGE CORE LENGTH DEVIATION PLUS OR MINUS FROM THE NOMINAL LENGTH SETTING OF A MOVABLE SPECIMEN SUPPORT. TWO ADDITIONAL HYDRAULIC SYSTEMS ARE USED TO ACTUATE THE SYSTEM. A PROTOTYPE MODEL WAS CONSTRUCTED TO VERIFY OPERATION OF THE BASIC CONCEPT. AFTER CONCLUDING THAT THE APPROACH WAS SOUND, PLANS WERE DRAWN AND COMPONENTS OBTAINED FOR CONSTRUCTION OF THE FULL SIZE INSTRUMENT. THE INSTRUMENT HAS PROVED TO BE ACCURATE, RUGGED, AND SIMPLE TO USE. IN OCTOBER 1970, IT WAS INSTALLED IN THE MAIN CORE DRILL TRUCK OF THE MATERIALS AND TESTS DIVISION WHERE IT HAS PROVEN VERY SATISFACTORY IN OPERATION. /AUTHOR/

• Supplemental Notes:
  • 3-20-69-016
• Corporate Authors:

  Texas State Department of Highways & Public Transp

  11th and Brazos Streets
  Austin, TX  United States  78701
• Authors:
  • Canfield, J R
• Publication Date: 1971-7

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Core samples; Hydraulic equipment; Hydraulic fluids; Length; Measuring instruments; Prototypes
• Old TRIS Terms: Cores; Hydraulic systems
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 00215519
• Record Type: Publication
• Files: TRIS, STATEDOT
• Created Date: Jun 28 1972 12:00AM