Sustainable Concretes for Transportation Infrastructure

This research focuses on the valuable utilization of spray dryer ash (SDA) and investigates its performance in concrete for structural and transportation applications. Based on the challenges associated with coal ash (including SDA) and the economic costs linked to cement production, this research seeks to develop an environmentally friendly and more cost effective concrete product by utilizing SDA in partial replacement of cement in concrete. With the exception of a relatively higher sulfur content, SDA exhibits excellent properties that are closely related to Class C fly ash and portland cement. The fineness and low carbon content properties of SDA/Class C fly ash provide potential benefits of increased strength (compressive and bond) and durability (freeze-thaw and corrosion) when used in concrete. In this study, the addition of SDA in non-air entrained concrete provides a general increase in compressive and bond strength with optimal limits ranging between 25-35% replacement. The presence of SDA produced a negligible effect on the freeze-thaw durability of the concrete, which was air entrained. Corrosion results are not as conclusive, but the 50% SDA mix provides performance similar to or slightly better than the control concrete.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=648
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/18159
• Supplemental Notes:
  • This document is disseminated under the sponsorship of the Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Colorado State University, Fort Collins

  Department of Civil and Environmental Engineering
  Fort Collins, CO  United States  80525

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108
• Authors:
  • Namagga, Carolyne
  • Atadero, Rebecca
• Publication Date: 2010-7

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: 77p

Subject/Index Terms

• TRT Terms: Bond strength (Materials); Compressive strength; Concrete; Concrete aggregates; Durability; Freeze thaw durability; Mix design
• Uncontrolled Terms: Coal ash; Spray dryer ash
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01167094
• Record Type: Publication
• Report/Paper Numbers: MPC Report No. 10-220
• Files: UTC, NTL, TRIS
• Created Date: Aug 31 2010 12:16PM