APPLICATION OF CONCRETE ADMIXTURES IN HIGHWAY CONSTRUCTION: RESULTS OF A SURVEY BY THE COMMITTEE ON CHEMICAL ADDITIONS AND ADMIXTURES FOR CONCRETE

THE RESULTS OF A SURVEY ARE PRESENTED. (1) CONCRETE ADMIXTURES ARE EXTENSIVELY USED IN HIGHWAY PAVEMENTS AND STRUCTURES. AIR-ENTRAINMENT IS EMPLOYED IN VIRTUALLY EVERY STATE, INCLUDING THOSE WHERE WEATHERING WOULD NOT BE CONSIDERED SEVERE. CALCIUM CHLORIDE IS WIDELY USED TO INCREASE RATE OF STRENGTH DEVELOPMENT, MOSTLY TO REDUCE THE TIME OF NEEDED PROTECTION IN COLD WEATHER. (2) WATER-REDUCING AGENTS AND RETARDERS ARE COMING INTO WIDESPREAD USE. A PARTICULARLY NOTABLE APPLICATION IS IN BRIDGE DECK CONSTRUCTION, WHERE DELAYED SURFACES. (3) ADMIXTURES ARE SELDOM USED SPECIFICALLY FOR THE ENHANCEMENT OF WORKABILITY, ALTHOUGH THAT RESULT MAY DERIVE AS A BY- PRODUCT FROM WATER REDUCERS OR AIR-ENTRAINING AGENTS. ONLY VERY LIMITED APPLICATION IS MADE OF ADMIXTURES FOR CONTROL OF ALKALI-AGGREGATE REACTION, FOR WATERPROOFING, OR BECAUSE OF CEMENTITIOUS OR POZZOLANIC PROPERTIES. (4) THE FEW AVAILABLE SPECIFICATIONS FOR ADMIXTURES, SUCH AS THOSE OF THE ASTM AND AASHO FOR AIR-ENTRAINING AGENTS, CALCIUM CHLORIDE AND FLY ASH, ARE GENERALLY ACCEPTED AND USED BY HIGHWAY DEPARTMENTS.

  • Supplemental Notes:
    • Vol 31, No 5, PP 25-30, 1 TAB
  • Authors:
    • Bloem, D L
  • Publication Date: 1961-5

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Filing Info

  • Accession Number: 00214086
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 11 1972 12:00AM