NON-DESTRUCTIVE TESTING OF CONCRETE

THE INITIAL PHASE INVOLVED LABORATORY PREPARATION OF CONCRETE CYLINDERS USING VARIOUS WATER CEMENT RATIOS. THESE WERE TESTED USING ULTRASONIC EQUIPMENT AND THE RESULTS WERE TO BE USED IN DEVELOPING STANDARD CURVES FOR PREDICTING COMPRESSIVE STRENGTHS OF FRESH CONCRETE. HAD THE LABORATORY RESULTS PROVED SATISFACTORY, THE NEXT PHASE WAS TO CORRELATE THE ULTRASONIC RESULTS PROVED SATISFACTORY, THE NEXT PHASE WAS TO CORRELATE THE ULTRASONIC RESULTS TAKEN IN THE FIELD ON ACTUAL CONSTRUCTION SITES WITH THE COMPRESSIVE STRENGTHS OF THE ROADWAY CYLINDERS. RESULTS OF THE LABORATORY PHASE WERE NOT ENCOURAGING. VERY LITTLE PREDICTABILITY OF COMPRESSIVE STRENGTH ON SAND AND GRAVEL MIXES WAS POSSIBLE UNTIL SERVERAL HOURS AFTER ADDITION OF WATER TO THE MIXES. EXPERIMENTATION WITH MORE HOMOGENEOUS SAND MIXES YIELDED NO BETTER RESULTS. FURTHER INVESTIGATION WITH THE PRESENT AVAILABLE EQUIPMENT SEEMS UNWARRANTED. /AUTHOR/

• Record URL:
  • http://www.fhwa.dot.gov/pavement/pub_details.cfm?id=161
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Louisiana Department of Highways

  P.O. Box 44245, Capitol Station
  Baton Rouge, LA  United States  70804
• Authors:
  • Rushing, H B
  • Burt, J O
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Compressive strength; Concrete; Forecasting; Nondestructive tests; Polymer concrete; Water cement ratio
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00215967
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: Study No 69-1c
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jan 12 1972 12:00AM