SHORT-TERM LOADING AND DEFORMATION OF CONCRETE IN UNIAXIAL TENSION AND PURE TORSION

COMPLETE STRESS-STRAIN AND TORQUE CURVES FOR CONCRETE AND MICRO-CONCRETE UNDER SHORT-TERM LOADING HAVE BEEN OBTAINED FOR SINGLE SIZES AND WIDE GAP GRADINGS OF AGGREGATE OF TWO DIFFERENT TYPES. THE IMPORTANCE OF ELIMINATING EFFECTS DUE TO BOTH AGGREGATE ABSORPTION AND THE TESTING TECHNIQUE IS EMPHASIZED. WHEN THE VOLUME FRACTIONS OF CEMENT AND WATER WERE CONSTANT, THE UNIAXIAL TENSILE STRENGTH, 'MODULUS OF ELASTICITY/PLASTICITY', TENSILE STRESS AT THE ONSET OF MICRO-CRACKING, 'MODULUS OF RIGIDITY/PLASTICITY', AND ULTIMATE STRENGTH OF CONCRETE ALL DECREASED WITH INCREASING AGGREGATE SIZE AND WITH INCREASING PROPORTIONS OF COARSE AGGREGATE. THE TENSION RESULTS CONFIRM THAT THERE IS A CRITICAL MINIMUM RATIO OF FINE AGGREGATE TO CEMENT BELOW WHICH THERE IS A CONSIDERABLE DECREASE IN STRENGTH WHEREAS THE TORSION RESULTS PROVIDE LITTLE EVIDENCE FOR THIS CRITICAL RATIO. /RRL/A/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Supplemental Notes:
  • Vol 20, No 64, PP 145-154, 15 FIG, 2 TAB, 3 PHOT, 23 REF
• Authors:
  • HUGHES, B P
  • ASH, J E
• Publication Date: 1968-9

Media Info

• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Aggregate gradation; Concrete; Concrete aggregates; Deformation; Deformation curve; Fracture mechanics; Loads; Mix design; Modulus of elasticity; Physical properties; Plasticity; Shear modulus; Tensile strength; Tension; Torsion tests; Water cement ratio
• Uncontrolled Terms: Concrete properties; Tensile stress
• Old TRIS Terms: Axial tension; Loading period
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00212997
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Feb 24 1970 12:00AM