EXPERIMENTAL STUDY FOR OPTIMUM MIX DESIGN IN DRY MIX COARSE AGGREGATE SHOTCRETE (PART 2) /IN JAPANESE/

SIX PARAMETERS OF THE MIX WERE VARIED IN THREE MIX DESIGNS FOR TUNNEL SUPPORT TO ASCERTAIN THE EFFECTS ON COMPRESSIVE STRENGTH AND REBOUND. TWENTY-SEVEN PROPORTIONINGS WERE USED. SAND GRADING WAS FOUND TO HAVE THE GREATEST EFFECT ON COMPRESSIVE STRENGTH: THE COARSER THE SAND, THE HIGHER THE STRENGTH INCREASES. ACCELERATOR AND CEMENT CONTENT ALSO EXERT INFLUENCE, BUT SAND--AGGREGATE RATIO HAD LITTLE EFFECT. FOR ALL SPECIMENS, THE AVERAGE COMPRESSIVE STRENGTH WAS 187 KG/SQ CM. THE SAME EFFECT OF SAND GRADING WAS OBSERVED WITH RESPECT TO REBOUND. SAND--AGGREGATE RATIO, WATER CONTENT, AND CEMENT ALSO PLAYED A ROLE. THE AVERAGE PERCENTAGE OF REBOUND WAS 32.4.

• Supplemental Notes:
  • Vol 18, pp 163-179, 13 FIG, 12 TAB, 6 REF
• Corporate Authors:

  Kajima Inst Constr Tech /Japan

  ,    
• Authors:
  • NAKAHARA, Y
  • Tazawa, Y
  • Nakazato, Y
  • Hagio, M
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Coarse aggregates; Compressive strength; Design; Mix design; Optimization; Rebound; Sand; Shotcrete; Structural supports; Tunnels
• Old TRIS Terms: Optimum design; Supports
• Subject Areas: Bridges and other structures; Design; Highways; Materials;

Filing Info

• Accession Number: 00214052
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 12 1972 12:00AM