Cast-Concrete Products Made with FBC Ash and Wet-Collected Coal-Ash

Cast-concrete hollow blocks, solid blocks, and paving stones were produced at a manufacturing plant by replacing up to 45% (by mass) of portland cement with fluidized bed combustion (FBC) coal ash and up to 9% of natural aggregates with wet-collected, low-lime, coarse coal-ash (WA). Cast-concrete product specimens of all three types exceeded the compressive strength requirements of ASTM from early ages, with the exception of one paving-stone mixture, which fell short of the requirement by less than 10%. The cast-concrete products made by replacing up to 40% of cement with FBC ash were equivalent in strength (89-113% of control) to the products without ash. The abrasion resistance of paving stones was equivalent for up to 34% FBC ash content. Partial replacement of aggregates with WA decreased strength of the products. The resistance of hollow blocks and paving stones to freezing and thawing decreased appreciably with increasing ash contents. The cast-concrete products could be used indoors in regions where freezing and thawing is a concern, and outdoors in a moderate climate.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Authors:
  • Naik, Tarun R
  • Kraus, Rudolph R
  • Chun, Yoon-moon
  • Botha, Francois D
• Publication Date: 2005-11

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 659-663
• Serial:
  • Journal of Materials in Civil Engineering
  • Volume: 17
  • Issue Number: 6
  • Publisher: American Society of Civil Engineers
  • ISSN: 0899-1561
  • EISSN: 1943-5533
  • Serial URL: http://ascelibrary.org/journal/jmcee7

Subject/Index Terms

• TRT Terms: Ash content; Compressive strength; Concrete blocks; Fluidized bed combustion; Freeze thaw durability; Lime fly ash; Paving stones; Portland cement; Recycled materials
• Uncontrolled Terms: Cast concrete; Coal ash
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01014779
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 19 2005 7:19PM