STRENGTH AND DURABILITY OF CONCRETES CONTAINING 50% PORTLAND CEMENT REPLACEMENT BY FLY ASH AND OTHER MATERIALS

The results are presented from an investigation on the compressive strength and durability of concretes containing substitute materials at a 50% replacement level (by mass) of Portland cement. Seven fly ashes (sub-bituminous, bituminous, and lignitic), together with limestone and an inert material (silica flour), were used as replacement materials. Durability studies included freeze-thaw testing (ASTM C66A), scaling resistance (ASTM C672), and abrasion resistance (ASTM C944). The air void system was assessed using the modified point count method of ASTM C457. The results indicate that although concretes with a 50% replacement level of cementitious material did not perform as well as the control concretes with no replacement, such concretes were able to meet freeze-thaw durability requirements. In the context of this study, compressive strength does not appear to be a significant factor in freeze-thaw durability. Results indicated that concretes with compressive strengths of less than 10 MPa will still pass the freeze-thaw test, provided an adequate air void system is in place. Abrasion resistance tends to increase with compressive strength but not in all cases.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/03151468
• Corporate Authors:

  National Research Council of Canada

  Research Journals
  Ottawa, Ontario K1A 0R6,   Canada 
• Authors:
  • LANGAN, B W
  • Joshi, R C
  • WARD, M A
• Publication Date: 1990-2

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 19-27
• Serial:
  • Canadian Journal of Civil Engineering
  • Volume: 17
  • Issue Number: 1
  • Publisher: National Research Council of Canada
  • ISSN: 0315-1468
  • Serial URL: http://www.nrcresearchpress.com/loi/cjce

Subject/Index Terms

• TRT Terms: Abrasion resistance; Air entrained concrete; Air voids; Bituminous materials; Compressive strength; Concrete; Concrete tests; Durability; Fly ash; Freeze thaw durability; Lignite; Portland cement; Strength of materials
• Uncontrolled Terms: Concrete strength
• Old TRIS Terms: Air voids content
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00493885
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 30 1990 12:00AM