THE PRACTICALITIES AND THEORY OF USING CRACK WIDTH SUMMATION TO ESTIMATE ASR EXPANSION

It has been shown that for structures affected by alkali-silica reaction (ASR), the deterioration of concrete properties can be related to the amount of expansion that has occurred. If the amount of expansion is known, it is also possible to calculate the prestress in the reinforcement and concrete resulting from the restraint to expansion. This may be beneficial when appraising such a structure. The present method of evaluating expansion from the sum of crack widths is crude, and varying results have been obtained by different researchers. Results from a series of tests in which crack width and angle were examined and related to expansion are presented here. A method for predicting expansion, which improves reliability, is proposed, and reasons for variations in results are discussed. (A)

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 183-92
  • Serial:
    • Volume: 104
    • Issue Number: 2

Subject/Index Terms

Filing Info

  • Accession Number: 00665170
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 9 1994 12:00AM