FRACTURE OF CONCRETE SUBJECTED TO CYCLIC AND SUSTAINED LOADING

TO STUDY THE MECHANICS FAILURE OF CONCRETE SUBJECTED TO SLOWLY APPLIED CYCLIC OR SUSTAINED STRESSES, SEALED SPECIMENS OF PASTE AND CONCRETE WERE TESTED UNDER THE MAXIMUM CYCLIC OR SUSTAINED COMPRESSIVE STRESSES OF 60 TO 90 PERCENT OF THE ULTIMATE STRESS. SUSTAINED OR CYCLIC LOADING RESULTED IN PROGRESSIVE CRACK PROPAGATION. FOR STRESSES LOWER THAN 70 PERCENT OF THE ULTIMATE, WHEN FAILURE DID NOT OCCUR WITHIN THE TEST DURATION, CRACKS PROPAGATED AT A RELATIVELY SLOW RATE. THIS CRACK GROWTH WAS CALLED STAGE I. STAGE II CRACK GROWTH WAS ASSOCIATED ONLY WITH FAILURE AND WAS CHARACTERIZED BY A FASTER GROWTH RATE OF MICROCRACKS, A SHARP INCREASE IN VOLUME DILATION, AND RAPID CHANGES IN ULTRASONIC MEASUREMENTS. /AUTHOR/

• Supplemental Notes:
  • Proc Vol 67, NO 10, PP 816-825
• Authors:
  • Shah, S P
  • Chandra, S
• Publication Date: 0

Media Info

• Serial:
  • Am Concrete Inst Journal & Proceedings
  • Volume: 68
  • Issue Number: 12

Subject/Index Terms

• TRT Terms: Accelerated tests; Breaking loads; Compression tests; Concrete; Concrete tests; Cracking; Expansion; Failure; Loads; Measurement; Microcracking; Pastes; Progression (Mathematics); Repeated loads; Specimens; Stresses; Studies; Time; Ultrasonics
• Uncontrolled Terms: Concrete cracking; Crack propagation; Loading
• Old TRIS Terms: Compressive strength tests; Progression
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213835
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 12 1971 12:00AM