THE COMPONENTS OF STRAIN IN OCNCRETE UNDER SUSTAINED COMPRESSIVE STRESS

THE STRAIN OF CONCRETE UNDER SUSTAINED COMPRESSIVE STRESS IS EXAMINED IN TERMS OF THREE COMPONENTS, INSTANTANEOUS RECOVERABLE, TIME-DEPENDENT RECOVERABLE AND IRRECOVERABLE, DEFINED HERE AS ELASTIC, DELAYED ELASTIC AND FLOW RESPECTIVELY. EXPERIMENTAL EVIDENCE IS PRESENTED OF THE INFLUENCE ON EACH OF THE LENGTH OF THE PERIOD OF LOADING AND THE AGE OF THE CONCRETE WHEN THE LOAD IS APPLIED. IT WAS FOUND THAT AT A GIVEN AGE THE RATE OF FLOW IS VIRTUALLY INDEPENDENT OF ANY EARLIER LOADING AND THAT THE DELAYED ELASTIC STRAIN TENDS TO A LIMITING VALUE WHICH VARIES LITTLE WITH THE AGE OF THE CONCRETE. THE RATE OF OCCURRENCE OF DELAYED ELASTIC STRAIN DIMINISHES WITH THE AGE OF THE CONCRETE AND IT CAN BE LINKED WITH THE CORRESPONDING RATE OF FLOW. /RRL/A/

• Supplemental Notes:
  • Vol17, No50, PP21-28, 9FIG, 4TAB, 12REF
• Authors:
  • Illston, J M
• Publication Date: 1965-3

Media Info

• Serial:
  • Magazine Concrete Research /UK/

Subject/Index Terms

• TRT Terms: Age; Compression; Compressive strength; Concrete; Elasticity (Mechanics); Flow; Loads; Strain (Mechanics); Stress (Psychology); Stresses; Testing; Tests
• Uncontrolled Terms: Compressive stress
• Old TRIS Terms: Delayed elastic; Loading period; Strains
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00212186
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Jan 27 1994 12:00AM