DYNAMIC TESTING OF CONCRETE PAVEMENTS WITH THE SONISCOPE

THE SONISCOPE IS AN ELECTRONIC INSTRUMENT DEVELOPED TO MEASURE PULSE VELOCITY OF HIGH-FREQUENCY SOUND WAVES THROUGH CONCRETE. FROM THIS VELOCITY THE DYNAMIC MODULUS OF ELASTICITY CAN BE DETERMINED. SINCE THE SUMMER OF 1949, THE KANSAS HIGHWAY COMMISSION HAS BEEN CONDUCTING EXTENSIVE INVESTIGATIONS OF CONCRETE PAVEMENTS AND TEST SPECIMENS USING THE SONISCOPE. EIGHT EXPERIMENTAL PAVEMENTS HAVE BEEN CONSTRUCTED, EACH IS MADE UP OF A NUMBER OF TEST SECTIONS OF VARYING COMPOSITION. ONE SUCH PAVEMENT NEAR MCPHERSON, KANSAS, WHICH CONSISTS OF 60 SECTIONS CONTAINING SEVERAL POZZOLANIC ADDITIONS AND FIVE DIFFERENT BRANDS OF CEMENT, WAS CONSTRUCTED TO STUDY THE REACTIVE EXPANSION OF CONCRETE. THE SECTIONS OF THE OTHER TEST ROADS, SOME OF WHICH WERE AIR-ENTRAINED, CONTAIN COARSE AND FINELY GROUND CEMENT ALONG WITH SEVERAL TYPES OF AGGREGATE. THE PURPOSE WAS TO STUDY THE STRENGTH GAINING QUALITIES OF THE VARIOUS TYPES OF CONCRETE, AND AN EFFORT WAS MADE TO IMPROVE THESE QUALITIES. SOUND VELOCITY DETERMINATIONS HAVE BEEN MADE PERIODICALLY WITH THE SONISCOPE ON ALL TEST PROJECTS, AND A SOUND VELOCITY HISTORY IS BEING MAINTAINED FOR THE DIFFERENT SECTIONS. IT IS BELIEVED THAT CHANGES IN THE MODULUS OF ELASTICITY, AND HENCE IN THE SOUND VELOCITY, ARE INDICATIVE OF CHANGES IN QUALITY OF CONCRETE. SUCH A HISTORY COULD THEREFORE BE USED TO CHECK CONCRETE FOR PROGRESSIVE IMPROVEMENT OR DETERIORATION. A NUMBER OF OLD PAVEMENTS WERE INVESTIGATED WITH THE SONISCOPE AND AN EFFORT WAS MADE TO CORRELATE THE VELOCITY OF SOUND WITH THE DEGREE OF DETERIORATION OF THE CONCRETE. THIS REPORT IS A DESCRIPTION OF THESE INVESTIGATIONS AND OF THE EQUIPMENT USED, ALONG WITH THE RESULTS WHICH HAVE BEEN OBTAINED TO DATE. NO ATTEMPT HAS BEEN MADE TO DRAW CONCLUSIONS OR TO ESTABLISH VALUES FOR SUCH A METHOD OF CONCRETE TESTING AT THIS TIME. /AUTHOR/

  • Supplemental Notes:
    • Vol 31, pp 234-245, 6 FIG, 2 TAB, 2 PHOT, 6 REF
  • Authors:
    • Meyer, R C
  • Publication Date: 1952

Media Info

  • Monograph Title: Proceedings of the Thirty-First Annual Meeting of the Highway Research Board, Washington, D.C., January 15-18, 1952
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00213962
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 1 1971 12:00AM