OPTIMUM MIX DESIGN FOR GAP-GRADED CONCRETE

AN OPTIMUM MIX-DESIGN METHOD IS PRESENTED FOR PROPORTIONING GAP-GRADED CONCRETE, BASED ON MIX PROPORTIONS OF OPTIMIZED CEMENT CONTENTS TO ACHIEVE VARIOUS COMPRESSIVE STRENGTHS. A STEP-BY-STEP PROCEDURE FOR USING THIS METHOD, TOGETHER WITH AN ILLUSTRATIVE NUMERICAL EXAMPLE IS DEVELOPED. THE PROPOSED MIX DESIGN METHOD, WHEN COMPARED WITH THAT OF ACI COMMITTEE 211 (ACI 613-54, REVISED 1969), SHOWS THAT FOR EQUAL MAXIMUM SIZE OF COARSE AGGREGATE, COMPRESSIVE STRENGTH, AND WORKABILITY, A GAP-GRADED CONCRETE PROPORTIONED BY THE PRESENT METHOD WOULD GIVE AN AVERAGE SAVING OF ABOUT 34 PERCENT IN CEMENT CONTENT VERSUS THE CONVENTIONAL CONCRETE PROPORTIONED BY THAT OF ACI 613-54 (REVISED 1969.) A COMPARISON OF THE PRESENT METHOD WITH CLASS A MIX IN THE STANDARD SPECIFICATIONS FOR ROADS AND BRIDGES, STATE OF SOUTH DAKOTA DEPARTMENT OF HIGHWAYS, SHOWS THAT THE GAP-GRADED CONCRETE PROPORTIONED BY THE PRESENT METHOD WOULD GIVE A SAVING OF ABOUT 30 PERCENT IN CEMENT CONTENT FOR ACHIEVING THE SAME RESULTS. /AUTHOR/

  • Corporate Authors:

    South Dakota School of Mines and Technology, Rapid City

    501 East St Joseph Street
    Rapid City, SD  United States  57701

    South Dakota Department of Transportation

    700 East Broadway Avenue
    Pierre, SD  United States  57501

    Bureau of Public Roads /US

    400 7th Street, SW
    Washington, DC  United States  20590
  • Authors:
    • Li, S T
    • Ramakrishnan, V
    • Rangan, B V
  • Publication Date: 1970-5

Subject/Index Terms

Filing Info

  • Accession Number: 00212085
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Report/Paper Numbers: 642 (68)
  • Files: TRIS, STATEDOT
  • Created Date: Sep 28 1970 12:00AM