CONTROL OF CRACKING DUE TO VOLUME CHANGE IN BASE-RESTRAINED CONCRETE MEMBERS

This work investigated shrinkage cracking behavior of thin mortar walls with continuous base restraint. Reduced-scale wall models were subjected to natural drying conditions to determine the effects of the horizontal and vertical (dowel) reinformcement, as well as the effects of wall length and height and length-height ratio on crack width and spacing. The base restraint showed a significant effect on the crack width and spacing. Smaller crack spacing in base restrained members were obtained for the same amounts of volume change and steel ratio, and compared with end-restrained members. Crack spacing proved to be related mainly to the combined effects of the horizontal reinforcement and wall height. On the other hand, a variation in crack width along the wall heights was observed. this variation proved to be related to the amount of change in restraint in the wall associated with its cracking. Finally, adopting the change-of-restraint principle, a formula has been suggested for the prediction of maximum crack width at any position along the wall height.

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  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=2747
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• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Rawi, R S
  • Kheder, G F
• Publication Date: 1990-7

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 397-405
• Serial:
  • ACI Structural Journal
  • Volume: 87
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Concrete structures; Fracture mechanics; Mortar; Reinforcing steel; Shrinkage; Volume changes; Walls; Width
• Subject Areas: Bridges and other structures; Highways; Materials; I20: Design and Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00496426
• Record Type: Publication
• Report/Paper Numbers: Title No. 87 S39
• Files: TRIS
• Created Date: Aug 31 1990 12:00AM