Development of Durable “Green” Concrete Exposed to Deicing Chemicals via Synergistic use of Locally Available Recycled Materials and Multi-scale Modifiers

From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements. In this study, a pure fly ash paste (PFAP) was developed in place of ordinary Portland cement paste (OPCP). This PFAP was prepared at room temperature and without direct alkali activation. The samples were prepared using only the as-received class C coal fly ash (CFA), water, and a very small amount of borax (Na₂B₄O₇). On average, the PFAP featured 28-d compressive strength of about 36 MPa, and micro-nano hardness and elastic modulus 29% and 5%, higher than the OPCP, respectively. These mechanical and other properties of the PFAP make it a viable “green” construction binder suitable for a host of structural and non-structural applications. Advanced characterization of the raw material and PFAP pastes was employed to elucidate the hydration mechanisms of this “green” binder. The obtained knowledge sheds light on the role of class C CFA in the hydration process and may benefit the expanded use of various CFAs in cementitious materials.

• Record URL:
  • http://cem.uaf.edu/media/257098/cesticc-final-report-xn.pdf
• 
• Record URL:
  • https://rosap.ntl.bts.gov/view/dot/34910
• Corporate Authors:

  Western Transportation Institute

  Montana State University, Bozeman
  P.O. Box 174250
  Bozeman, MT  United States  59717-4250

  Center for Environmentally Sustainable Transportation in Cold Climates

  306 Tanana Loop, Duckering Building 245
  Fairbanks, AK  United States  99775-5900

  Department of Transportation

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Xie, Ning
  • Cui, Na
• Publication Date: 2018-2

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Figures; Photos; References; Tables;
• Pagination: 53p

Subject/Index Terms

• TRT Terms: Admixtures; Binders; Deicing chemicals; Durability; Environmental impacts; Fly ash; Hydration; Mechanical properties; Recycled materials
• Subject Areas: Environment; Highways; Materials;

Filing Info

• Accession Number: 01665913
• Record Type: Publication
• Report/Paper Numbers: INE/AUTC 17.04, INE/CESTiCC 1502
• Files: NTL, TRIS, ATRI, USDOT
• Created Date: Apr 11 2018 5:21PM