Microsphere-Based Admixture for Durable Concrete

A replacement for conventional air entraining agents has been developed. A microsphere-based liquid admixture can be added to concrete to improve resistance to cyclic freezing and thawing. The hollow microspheres have a tough shell and act as stress relief zones when freezing water expands within concrete, similarly to entrained air voids. This new admixture differs from conventional air entrainment due to the stability of the microspheres and the volume space requirements. The microsphere-based admixture is more robust than conventional air entrainment and is not affected by air loss. The admixture also allows for reductions in portland cement contents. Field trials show that concrete using this admixture is easy to place and finish.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 59-63
  • Serial:
    • Concrete International
    • Volume: 36
    • Issue Number: 3
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 01523028
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 20 2014 10:05PM