OVERVIEW OF THE USE OF FLY ASH CONCRETE IN HIGHWAY CONSTRUCTION

An overview of opportunities and concerns on the use of fly ash as a pozzolan in hydraulic cement concrete in constructing highways and other transportation facilities is presented. It is derived primarily from more detailed information given in NCHRP Synthesis of Highway Practice 127. Some of the early concerns related to the loss of entrained air in fly ash concrete, shipment-to-shipment uniformity of fly ash, and more careful selection of by-products marketed as pozzolans. Significant differences between the by-products from burning bituminous coal and subbituminous coal have been identified, and more fundamental information is being developed. The need to use a more rational method of proportioning ingredients for concretes containing fly ash based on performance characteristics is discussed. A more rational approach can provide opportunities for more efficient utilization of fly ash as a pozzolan in hydraulic cement concrete.

Media Info

  • Features: Figures; References;
  • Pagination: p. 95-98
  • Monograph Title: Cement, admixtures, and concrete
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00605620
  • Record Type: Publication
  • ISBN: 0309050634
  • Files: TRIS, TRB, ATRI
  • Created Date: Mar 31 1991 12:00AM