Evaluation of Alternative Pozzolanic Materials for Partial Replacement of Portland Cement in Concrete

The supply of class F coal fly ash throughout the United States has recently diminished due to supply of natural gas and alternative energy sources as well as environmental restrictions. As a result, the concrete industry in the state of Florida has experienced supply shortages of class F fly ash for construction of Florida Department of Transportation (FDOT) owned structures. To avoid future problems stemming from inevitable fly ash supply shortages in the future, the FDOT chose to explore alternative materials that can be used to replace some or all the fly ash that is currently required in FDOT concrete mixes. Physical and chemical material properties were characterized for nine different replacement candidates. A total of over 60 mortar mixes and 20 concrete mixes were prepared for evaluation of workability, structural adequacy, and durability. Thermal hydration data, plastic properties, mechanical properties, and durability properties were acquired from the mixes to determine ideal replacement proportions for the substitution of class F coal fly ash in portland cement concrete mixes. Since the goal was to find replacements for class F fly ash, performance was compared to that of mortars and concretes containing a 20% replacement of portland cement with class F fly ash.

• Record URL:
  https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/research/reports/fdot-bdv31-977-06-rpt.pdf
• 
• Summary URL:
  https://fdotwww.blob.core.windows.net/sitefinity/docs/default-source/research/reports/fdot-bdv31-977-06-sum.pdf
• Supplemental Notes:
  • Cover date: February 2017.
• Corporate Authors:

  University of Florida, Gainesville

  Department of Civil Engineering, P.O. Box 116580
  Gainesville, FL  United States  32611-6580

  Florida Department of Transportation

  Research Center
  605 Suwannee Street MS-30
  Tallahassee, FL  United States  32399-0450

  Department of Transportation

  Washington, DC  United States 
• Authors:
  • Ferraro, Christopher C
  • Paris, Jerry M
  • Townsend, Timothy G
  • Tia, Mang
• Publication Date: 2016-9

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 345p

Subject/Index Terms

• TRT Terms: Admixtures; Alternatives analysis; Evaluation and assessment; Fly ash; Mechanical properties; Mix design; Mortar; Portland cement; Pozzolan
• Geographic Terms: Florida
• Subject Areas: Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 01631416
• Record Type: Publication
• Contract Numbers: BDV31-977-06
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Mar 30 2017 2:27PM