Design and Evaluation of High-Volume Fly Ash Concrete Mixes
Traditional concrete specifications limit the amount of fly ash to 35 or 40 percent cement replacement. Recent studies, including those by the investigators, have shown that higher cement replacement percentages - even up to 75 percent - can result in excellent concrete in terms of both strength and durability. Referred to as high-volume fly ash (HVFA) concrete, this material offers a viable alternative to traditional portland cement concrete and is significantly more sustainable. However, HVFA concrete is not without its problems. At all replacement rates, fly ash generally slows down the setting time and hardening rates of concrete at early ages, especially under cold weather conditions, and when less reactive fly ashes are used. Furthermore, with industrial by-products, some variability in physical and chemical characteristics will normally occur, not only between power plants but also within the same plant. Consequently, to achieve the benefits of HVFA concrete, guidelines are needed for its proper application in bridges, roadways, culverts, retaining walls, and other transportation-related infrastructure components.
- Record URL:
Language
- English
Project
- Status: Completed
- Funding: $150000.00
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Contract Numbers:
DTRT06-G-0014
00033573
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Sponsor Organizations:
Missouri Department of Transportation
1617 Missouri Boulevard
P.O. Box 270
Jefferson City, MO United States 65102 -
Principal Investigators:
Volz, Jeffrey
- Start Date: 20101206
- Expected Completion Date: 0
- Actual Completion Date: 20120930
- Source Data: RiP Project 28059
Subject/Index Terms
- TRT Terms: Admixtures; Durability; Fly ash; Guidelines; Infrastructure; Portland cement concrete; Setting (Concrete); Waste products (Materials)
- Uncontrolled Terms: High volume fly ash concrete
- Subject Areas: Design; Highways; Research; I15: Environment; I30: Materials;
Filing Info
- Accession Number: 01471150
- Record Type: Research project
- Source Agency: Center for Infrastructure Engineering Studies
- Contract Numbers: DTRT06-G-0014, 00033573
- Files: UTC, RIP
- Created Date: Feb 1 2013 1:16AM