IN-PLACE STRENGTH OF CONCRETE: A COMPARISON OF TWO TEST SYSTEMS

DETAILS ARE GIVEN OF TESTS CARRIED OUT ON CONCRETE USING THE REBOUND OR SWISS HAMMER AND A NEW "PROBE" SYSTEM, WHICH HAS BEEN SUGGESTED AS AN ECONOMICAL REPLACEMENT FOR CORE AND CYLINDER TESTS, AND DEPENDS UPON THE PENETRATION OF A STEEL ROD FIRED FROM A STUD GUN AS AN INDEX OF STRENGTH. IT WAS FOUND THAT THE PENETRATION OF THE ROD INTO THE CONCRETE IS AFFECTED BY THE STRENGTH OF THE CONCRETE AND OTHER PROPERTIES SUCH AS AGGREGATE STRENGTH, ELASTICITY OR POROSITY. THIS TENDS TO LIMIT THE ACCURACY OF THE SYSTEM, AND FOR THIS REASON IS NOT RECOMMENDED AS A REPLACEMENT FOR CONVENTIONAL CORE TESTS. /RRL/

• Supplemental Notes:
  • Vol 45, No 3, PP 55-60, 9 FIG, 4 TAB
• Corporate Authors:

  Quarry Managers Journal Limited

  62-64 Baker Street
  London W1M 2BN,   England 
• Authors:
  • Gaynor, R D
• Publication Date: 1970-3

Media Info

• Serial:
  • Cement, Lime and Gravel

Subject/Index Terms

• TRT Terms: Boring; Concrete; Core samples; Hammers; Measuring probes; Pendulum tests; Strength of materials; Test procedures
• Old TRIS Terms: Probing
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213113
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: May 26 1971 12:00AM