SOME INVESTIGATIONS INTO THE USE OF SUGAR AS AN ADMIXTURE TO CONCRETE

SMALL QUANTITIES OF SUGAR /UP TO .25% BY WEIGHT OF CEMENT/ WERE ADDED TO PORTLAND CEMENT CONCRETE MIXES TO DETERMINE THE EFFECT ON VARIOUS CONCRETE PROPERTIES. THE INVESTIGATIONS COVERED A WIDE RANGE OF CEMENT COMPOSITION AND MIX PROPORTIONS, AND SHOWED THAT SUGAR IS A WATER- REDUCING, SET-RETARDING ADMIXTURE SIMILAR IN CHARACTER TO MANY COMMERCIAL RETARDERS. FOR GENERAL USE, IT WOULD SEEM THAT 0.05% SUGAR, GIVING ABOUT 4 HOURS RETARDATION WITH ORDINARY PORTLAND CEMENT, WOULD BE THE MOST SUITABLE AMOUNT COMPATIBLE WITH CONSTRUCTIONAL REQUIREMENTS. IN ADDITION TO THE RETARDING ACTION, IT WAS FOUND THAT THIS AMOUNT OF SUGAR INCREASED THE STRENGTH OF CONCRETE, BOTH IN COMPRESSION AND FLEXURE, AND GAVE A MORE WORKABLE MIX. THESE FACTORS WOULD ENABLE THE MIX DESIGN FOR A SPECIFIED STRENGTH AND WORKABILITY TO BE ADJUSTED, THUS ACHIEVING A REDUCTION IN CEMENT CONTENT OF UP TO 15%. THIS IS EQUIVALENT TO A SAVING IN MATERIAL COSTS OF UP TO 6S.0D. PER CU. YD OF CONCRETE, FOR WHICH THE COST OF THE ADMIXTURE WOULD BE ABOUT 2D. SUGAR HAD NO NOTICEABLE EFFECT ON THE DENSITY, DURABILITY, SHRINKAGE OR ABSORPTION PROPERTIES OF CONCRETE, NOR WAS THE METHOD OF CURING IMPORTANT, PROVIDED THAT THE INITIAL RETARDATION HAD TAKEN PLACE BEFORE THE SPECIMENS WERE PLACED IN WATER. THERE WAS NO EVIDENCE OF MIGRATION OF THE SUGAR SOLUTION WITHIN THE MIX AND CONSEQUENT CONCENTRATION./RRL/A/

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Filing Info

  • Accession Number: 00212201
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Feb 1 1994 12:00AM