DISCUSSION ON CALCIUM CHLORIDE IN CONCRETE

THE USE OF CALCIUM CHLORIDE AS AN ACCELERATOR IN THE HARDENING OF CONCRETE IS DISCUSSED. AN INVESTIGATION IS REPORTED CONCERNING THE ACTION OF CALCIUM CHLORIDE ON SEVERAL DIFFERENT BRANDS OF CEMENT. THE EFFECTS OF CALCIUM CHLORIDE UNDER DIFFERENT TEMPERATURE CONDITIONS WERE TESTED BY EXPOSING 2-IN. MORTAR CUBES TO NORMAL INDOOR TEMPERATURES, WHILE OTHERS WERE STORED OUTDOORS. THE INCREASE IN STRENGTH OF OUT-DOOR SPECIMENS CONTAINING CALCIUM CHLORIDE OVER THE PLAIN SPECIMENS UNDER THE SAME STORAGE INDICATED THE EFFICIENCY OF THIS PRODUCT UNDER SUCH CONDITIONS. THE PRACTICAL APPLICATION OF THE USE OF CALCIUM CHLORIDE AS AN ACCELERATOR IS ILLUSTRATED IN THE CONCRETE ROADWAY PLACED AT SEVERAL BRIDGE APPROACHES OVER WHICH TRAFFIC WAS ADMITTED SEVEN DAYS AFTER THE ROADWAY WAS PLACED. THE CONCRETE CONTAINING CALCIUM CHLORIDE SHOWS A LOWER STRENGTH AT THE SIX-MONTHS PERIOD THAN THE PLAIN CONCRETE, BUT THE LOWEST STRENGTH ON THE CALCIUM CHLORIDE CONCRETE IS IN EXCESS OF 3000 LB. PER SQ. IN. WHICH IS CONSIDERED A SAFE VALUE FOR ANY STRUCTURE. THE CONCRETE WITH A 2-PER-CENT SOLUTION OF CALCIUM CHLORIDE SHOWED HIGHER COMPRESSIVE STRENGTH THAN THE CONCRETE WITH A 4-PER-CENT SOLUTION. THE CONCRETE SLABS WERE REINFORCED WITH COLD-DRAWN WIRE MESH, AND AN EXAMINATION OF THE STEEL SHOWED NO DETRIMENTAL ACTION OF THE CALCIUM CHLORIDE.

  • Supplemental Notes:
    • Vol 23, ParT II, PP 315-318
  • Authors:
    • Mattimore, H S
  • Publication Date: 1923

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  • Accession Number: 00208511
  • Record Type: Publication
  • Source Agency: Engineering News-record
  • Files: TRIS
  • Created Date: Jun 10 1994 12:00AM