COMPRESSIVE STRENGTH OF MUNICIPAL SLUDGE ASH MORTARS

Sludge ashes produced by the incineration of municipal sewage wastes are becoming increasingly difficult to dispose of in landfills, and there is a resulting increase of interest in disposal by inorporation in building materials. In the present study, a comprehensive test program was developed to examine the potential for using the ash as a fine aggregate in mortar. The strength characteristics of mortars prepared from sludge ash with addition of fly ashes (both Classes C and F) and varying amounts of cement and lime were cured under standard laboratory conditions for periods of 1, 3, 7, 14, and 28 days before testing for compressive strength. The results indicate that the addition of sludge ash adversely affects the strength behavior of mortars. Although partial substitution of sludge ash with fly ash gave improved results, strengths were always less than those obtained from control mortars using sand. Addition of fly ashes also improves mortar workability. The addition of lime in place of cement reduces strength.

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• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Bhatty, J I
  • Reid, K J
• Publication Date: 1989-7

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 394-400
• Serial:
  • ACI Materials Journal
  • Volume: 86
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Cement; Compressive strength; Fine aggregates; Mortar; Sludge (Deposit); Strength of materials; Testing; Workability
• Old TRIS Terms: Ashes
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00486834
• Record Type: Publication
• Report/Paper Numbers: Title No. 86-M34
• Files: TRIS
• Created Date: Aug 31 1989 12:00AM