SYMPOSIUM SUMMARY

THE MEASUREMENT OF PULSE VELOCITIES DISCUSSED IN THIS SYMPOSIUM WERE MADE WITH THE SONISCOPE. IT IS, HOWEVER, ACKNOWLEDGED THAT OTHER DEVICES ARE BEING USED FOR MEASURING PULSE VELOCITY THROUGH CONCRETE AND THAT THE USERS OF THESE DEVICES DO NOT ALWAYS AGREE WITH THE SONISCOPE USERS IN THE INTERPRETATION OF TEST RESULTS. SEVERAL ROUTINE USES WERE REPEATEDLY DETAILED IN THE PAPERS PRESENTED DURING THE SYMPOSIUM. FOREMOST AMONG THESE IS THE EVALUATION OF UNIFORMITY IN STRUCTURE. OTHER ROUTINE USES OF THE SONISCOPE ARE: (1) THE DETERMINATION OF A TREND IN THE PERFORMANCE OF CONCRETE OVER A PERIOD OF TIME, AND (2) THE DETERMINATION OF A GENERAL LEVEL OF CONCRETE QUALITY. ONE RESEARCH APPLICATION OF THE SONISCOPE REPORTED, IS THE DETERMINATION OF THE EXACT LOCATION AND EXTENT OF CRACKS IN CONCRETE. SEVERAL AUTHORS COMMENTED UPON THE USEFULNESS OF SONISCOPE TESTS IN EVALUATING THE SETTING OF HARDENING OF CONCRETE. UNANIMITY OF OPINION AMONG THE AUTHORS WAS INDICATED IN THE FOLLOWING AREAS: (1) NO FURTHER DEVELOPMENTAL WORK IS NEEDED ON THE SONISCOPE ITSELF, (2) THE SONISCOPE DOES NOT REPLACE OTHER TESTING TECHNIQUES BUT RATHER SUPPLEMENTS THEM, (3) LITTLE IS TO BE GAINED BY COMPUTING ANYTHING EXCEPT PULSE VELOCITY FROM SONISCOPE TESTS, (4) AWARENESS WAS EVIDENT OF THE GRAVE DIFFICULTIES ASSOCIATED WITH PREDICTING EITHER FLEXURAL OR COMPRESSIVE STRENGTH ON THE BASIS OF PULSE VELOCITY TESTS, AND (5) PAVEMENT SLABS REPRESENT THE MOST CHALLENGING STRUCTURAL FORM FOR EVALUATION THROUGH PULSE VELOCITY TESTS. ATTENTION WAS CALLED TO THE NEED FOR AN OPERATING MANUAL OR SOME OTHER FORM OF PUBLICATION WHICH WOULD CLEARLY DESCRIBE APPROPRIATE TECHNIQUES IN OPERATING THE SONISCOPE, COLLECTING INFORMATION WITH IT, AND INTERPRETING OF RESULTS THEREOF.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrbbulletin/206/206-011.pdf
• Supplemental Notes:
  • No 206, pp 72-74 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:
  • Whitehurst, E A
  • Oleson, C C
  • Valore, R C
• Publication Date: 1959

Media Info

• Monograph Title: Effects of concrete characteristics on the pulse velocity
• Serial:
  • Highway Research Board Bulletin
  • Issue Number: 206
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Compressive strength; Concrete; Concrete hardening; Concrete tests; Conferences; Cracking; Durability; Flexural strength; Hardness; Pulses; Soil structure; Velocity
• Uncontrolled Terms: Concrete cracking; Pulse velocity
• Old TRIS Terms: Soniscope
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213713
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jul 27 1970 12:00AM