Crack-Reducing Admixture

After placement, the volume of concrete changes, largely due to drying shrinkage. The change in volume can lead to tensile stresses and cracking. Cracks are a concern not only for aesthetic reasons, but also because they may diminish the quality of the concrete. Durability and serviceability may be compromised, causing leakages and corrosion. Drying shrinkage is affected by a number of factors, though the greatest influences are water and coarse aggregate, which have an effect on the paste content. Minimization of drying shrinkage can be handled with the addition to the mixture of shrinkage-reducing admixtures (SRAs). However, SRAs have little effect on reducing the crack width of the cracking that occurs. An alternative to SRAs is a crack-reducing admixture, which will reduce the width of cracks in addition to reducing shrinkage.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 53-57
  • Serial:
    • Concrete International
    • Volume: 36
    • Issue Number: 1
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 01522980
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 1 2014 11:29PM