RAPID DETERMINATION OF THE FLY ASH CONTENT OF CONSTRUCTION MATERIALS

X-ray fluorescence (XRF) methods have been used successfully to determine the amount of fly ash in portland cement-fly ash mixtures. The procedure has been used on mixtures of dry cementitious constituents prior to batching, and also on portland cement-fly ash mortars and concrete. The method is based on the determination of the concentration of barium (Ba) and strontium (Sr) present in the construction materials. These two elements are greatly enriched in Iowa fly ashes and act as "finger prints" for the presence of fly ash. If proper criteria are satisfied, they permit the quantification of the amount of fly ash in a given mixture. The method is most effective when it can be calibrated with materials taken directly from a given jobsite. Samples can be analyzed in less than 10 minutes. Using a modern, computer-controlled x-ray fluorescence spectrometer, the method can be extended to determine other elements present in a sample, including sulfur and chlorine, which are of importance to investigations of chemical attack in portland cement-based materials.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3528769
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Schlorholtz, S M
  • Dubberke, W
• Conference:
  • Symposium on Determination of the Chemical and Mineral Admixture Content of Hardened Concrete
  • Location: Montreal, Quebec, CANADA
  • Date: 1994-6-20 to 1994-6-20
• Publication Date: 1995-6

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 69-75
• Serial:
  • Cement, Concrete and Aggregates
  • Volume: 17
  • Issue Number: 1
  • Publisher: American Society for Testing and Materials (ASTM)
  • ISSN: 0149-6123
  • Serial URL: http://journalsip.astm.org/JOURNALS/CEMENT/cca_home.html

Subject/Index Terms

• TRT Terms: Admixtures; Building materials; Fly ash; Minerals; Mortar; Portland cement; X ray fluorescence
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00715290
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 1 1996 12:00AM