CONCRETE VIBRATION, SEGREGATION, AND SUSCEPTIBILITY TO SEGREGATION /IN FRENCH/

PROBLEMS ENCOUNTERED DURING THE VIBRATION OF CONCRETE, ESPECIALLY THE COMPACTION OF CONCRETE USED FOR CONTROL SAMPLES ARE DISCUSSED. A LARGE NUMBER OF TESTS WERE CARRIED OUT IN CONJUCTION WITH THE AFNOR COMMITTEE. RESULTS LED TO THE ESTABLISHMENT OF AN EXPERIMENTAL RULE FOR CALCULATING SAMPLE VIBRATION TIME. BY EXTRAPOLATION, THIS RULE WAS ADAPTED TO NORMAL VIBRATION TIME FOR CONCRETE STRUCTURES. NOMOGRAPHS ARE PRESENTED FOR EACH TYPE OF SAMPLE, ON WHICH WILL BE BASES THE SPECIFICATION NFP 18 422 "PLACING OF CONCRETE BY MEANS OF A VIBRATING NEEDLE." THE SECOND PART IS CONCERNED WITH SEGREGATION AND SUSCEPTIBILITY TO SEGREGATION. A SEGREGATION INDEX FOR MEASURING CONCRETE SEGREGATION ENABLES THE EXPERIMENTAL STUDY OF SEGREGATIONS TO BE CONDUCTED AS A FUNCTION OF MIX- DESIGN, WATER PROPORTIONING, MIXING, TRANSPORT, VIBRATION, ETC. DETAILS ARE GIVEN OF AN APPARATUS DEVELOPED FOR TESTING CONCRETE BY MEASURING ITS SEGREGATION UNDER STANDARDIZED AND REPETITIVE CONDITIONS. /LCPC(A)RRL/

  • Supplemental Notes:
    • No 265, pp 37-86, FIGS, TABS, PHOTS, 15 REF
  • Authors:
    • Dreux, G
    • Gorisse, F
  • Publication Date: 1970-1

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  • Accession Number: 00215075
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 29 2004 5:52PM