HOW SMART IS CONCRETE?

Research is reported which is using chemical-filled fibers embedded in concrete to turn concrete into a 'smart material,' smart enough to recognize and solve concrete problems such as corrosion, cracking, and freeze-thaw damage. To combat corrosion of steel reinforcing bars, commercially available hollow and porous fibers of fiberglass or polypropylene is being used. The fibers are filled with calcium nitirite and anticorrosion chemical and sealed with polyol. The coating acts as a sensor and dissolves to release the calcium nitirite when the concrete's alkalinity reaches a high enough level. Another solution for combating cracking involves filling the fiber with a crack-repair adhesive that is released when a coating is stripped away, or when it breaks in response to the cracking. For freeze-thaw situations, fibers are filled with anti-freeze solution that is released into the concrete. Other aspects of the research are also described.

  • Availability:
  • Corporate Authors:

    McGraw-Hill, Incorporated

    330 West 42nd Street
    New York, NY  United States  10036
  • Publication Date: 1992-3-23

Media Info

  • Pagination: p. 19-20
  • Serial:
    • ENR
    • Volume: 228
    • Issue Number: 12
    • Publisher: McGraw-Hill, Incorporated
    • ISSN: 0891-9526

Subject/Index Terms

Filing Info

  • Accession Number: 00621134
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 30 1992 12:00AM