INVESTIGATIONS OF INTERNAL VIBRATION OF CONCRETE

A TESTING METHOD HAS BEEN DEVISED FOR DETERMINING THE RADIUS OF ACTION OF INTERNAL VIBRATORS IN FRESH CONCRETE. TESTS HAVE BEEN MADE WITH INTERNAL VIBRATORS WITH VARYING FREQUENCIES, AMPLITUDES, TUBE DIAMETERS, ETC. THE LARGEST RADIUS OF ACTION WAS OBTAINED AT AN OPTIMUM FREQUENCY ABOUT 12000 VIBR.PER MIN. THE RADIUS OF ACTION OF AN INTERNAL VIBRATOR WAS TO A HIGH DEGREE INFLUENCED BY THE CONSISTENCE AND THE COMPOSITION OF THE CONCRETE, THE DIMENSION AND DESIGN OF THE FORM, AND THE REINFORCEMENT. A NUMBER OF TEST SPECIMENS WERE COMPACTED WITH INTERNAL VIBRATORS, WORKING WITH DIFFERENT FREQUENCIES AND AMPLITUDES. AFTER HARDENING 15 CM CUBES WERE SAWED FROM THE TEST SPECIMENS. THE VARIATIONS IN THE COMPRESSIVE STRENGTH AND IN THE UNIT WEIGHT OF THE CUBES WERE FOUND TO BE SMALL. /RRL/A/

  • Supplemental Notes:
    • 32 Pp, 4 PhOT, 19 FIG, 3 TAB, 19 REF
  • Authors:
    • Forssblad, L
  • Publication Date: 1965

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Filing Info

  • Accession Number: 00212246
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Feb 20 1994 12:00AM