RELATION BETWEEN THE STRENGTH AND THE ELASTICITY MODULUS OF CONCRETE /CZECH/

INVESTIGATIONS CARRIED OUT USING ULTRASONIC EQUIPMENT (RECO, FIRM WOLFGANG RENSCH, DDR; TRANSMITTING FREQUENCY 43 HERTZ) ON CONCRETE TEST CUBES VARYING IN COMPOSITION AND STRENGTH SHOWED THAT THERE IS A DIRECT RELATION BETWEEN CONCRETE STRENGTH AND ELASTICITY MODULUS. FROM THE FACT THAT THE ULTRASONIC CONDUCTIVITY OF THE CONCRETE BLOCK IS THE PRODUCT OF THE AMOUNT AND CONDUCTIVITY OF THE INDIVIDUAL COMPONENTS (WHILE ITS STRENGTH DEPENDS ON THAT OF THE CEMENT) FOR WHICH REASON ULTRASONIC STRENGTH TESTS ARE SUBJECT TO LIMITATIONS - THE FOLLOWING KNOWLEDGE CAN BE DERIVED (BY MEANS OF A DIMENSION "K") = HIGH-STRENGTH CONCRETE WITH A RELATIVELY SMALL MAXIMUM GRAIN SIZE, I.E. A HIGH-GRADE CEMENT-WATER MIXTURE IS SUITABLE FOR CONCRETE ROADS; FOR TUNNEL CONSTRUCTION HIGH-STRENGTH PURE CEMENT OR FINE-GRAINED CONCRETE IS CORRECT, AND A HIGH-STRENGTH CONCRETE WITH A LOW WATER-CEMENT FACTOR AND A STIFF CONSISTENCY IS RIGHT FOR PRESTRESSED CONCRETE. CONCRETE FOR RADIATION PROTECTIVE SCREENS SHOULD CONSIST OF HEAVY AGGREGATE AND DENSE CEMENT. /FG/RRL/

  • Supplemental Notes:
    • Vol 15, No 12, PP 508-512, 5 TAB, 4 PHOT, 4 REF
  • Authors:
    • Marko, P
  • Publication Date: 1967

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00212833
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: May 19 1970 12:00AM