This report describes two rounds of a cooperative study sponsored by the Subcommittee on Materials of the American Association of State Highway Officials (AASHO) on the use of Atomic Absorption Spectrophotometry (AA) for analysis of portland cement and provides a recommended method proposed for adoption as an AASHO Optional Standard. The participating laboratories and the instrumentation used are identified. Results obtained on four cements are given, using three different AA methods. These results are compared with results obtained by a large number of laboratories using standard chemical methods for the same cements. A statistical treatment of the reported results is presented which indicates that use of the recommended AA method gives the best agreement with chemical results. The recommended method also gives less variability than the other AA methods. Analysis time of about 1.5 hours for six elements in a single sample of cement, using the recommended method, is reported. About 8 hours are required by standard chemical methods. If multiple samples are to be analyzed, greater savings in time should be achieved. /FHWA/

  • Corporate Authors:

    Federal Highway Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Bean, B L
    • Arni, H T
  • Publication Date: 1972-9

Media Info

  • Pagination: 34 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00099565
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-72- 41 Intrm Rpt., FCP 24F5-013
  • Files: TRIS, USDOT
  • Created Date: Nov 5 1976 12:00AM