FACTORS AFFECTING THE REACTIVITY OF FLY ASH FROM WESTERN COALS

This study of 16 fly ashes from various Colorado and Wyoming coals will show the relationship of coal and fly ash analyses to pozzolanic activity with porland cement. Samples have been followed from the coal source through the power plant combustion and collection system to show the effects upon fly ash quality for use as a mineral admixture in concrete. Each coal source is analyzed using ASTM Method for Proximate Analysis of Coal and Coke D3172-73(1984) and classified by rank under ASTM Classification of Coals by Rank (D-388-84). The ash is analyzed and studied using ASTM Method for Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland Cement Concrete (C 311-85). The problems associated with the present ASTM fly ash classification are shown in these samples by the conflicting data relative to their coal source and chemical analyses. Based upon the existing classifications under ASTM Specificaion for Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Admixure in Porland Cement Concrete (C 618-85), both Class C and Class F ashes are studied.

• 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:
  • Harris, H A
  • Thompson, J L
  • Murphy, T E
• Publication Date: 1987-6

Media Info

• Features: References; Tables;
• Pagination: p. 34-37
• Serial:
  • Cement, Concrete and Aggregates
  • Volume: 9
  • 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: Chemical reactivity; Classification; Coal; Fly ash; Portland cement; Pozzolanic action; Specifications
• Subject Areas: Geotechnology; Highways; I36: Aggregates;

Filing Info

• Accession Number: 00472842
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 30 1987 12:00AM