IMPACT AND PENETRATION TESTS OF PORTLAND CEMENT CONCRETE

TESTS USING THE SWISS REBOUND HAMMER AND WINDSOR PROBE TEST SYSTEM WERE MADE ON CONCRETE SLABS AND CYLINDERS MADE WITH THREE COARSE AGGREGATES, ONE MORTAR, TWO MAXIMUM SIZES OF AGGREGATE, AND AT FOUR AGES, AND WERE COMPARED WITH COMPRESSIVE STRENGTH TESTS ON THE CYLINDERS. THE GENERAL CONCLUSIONS WERE THAT, ALTHOUGH BOTH REBOUND AND PROBE MEASUREMENTS SHOW A CORRELATION WITH COMPRESSIVE STRENGTH, NEITHER TEST PROVIDES A PRECISE DETERMINATION OF STRENGTH. EITHER ONE CAN BE USED TO ASSESS RELATIVE QUALITY IN DIFFERENT CONCRETES OR DIFFERENT AREAS OF THE SAME CONCRETE, TO SURVEY A CONCRETE SURFACE TO FIND AREAS OF POOR QUALITY OR OF DETERIORATED CONCRETE, AND TO DETERMINE WHEN IT IS SAFE TO REMOVE FORMS. FOR ANY OF THE USES TO WHICH BOTH CAN BE PUT, THE SWISS HAMMER HAS AN ADVANTAGE BECAUSE OF THE LARGER NUMBER OF TESTS THAT CAN BE MADE ON A GIVEN AREA, LOWER COST PER TEST, AND NONDESTRUCTIVENESS. /FHWA/

  • Corporate Authors:

    Federal Highway Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Arni, H T
  • Publication Date: 1972-2

Media Info

  • Pagination: 50 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00212140
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-73- 5 Final Rpt., FCP 2723 514
  • Files: TRIS, USDOT
  • Created Date: Jul 16 1976 12:00AM