Synthesis of Information Related to Highway Practices. Topic 55-05. Use and Availability of Supplementary Cementitious Materials for Concrete
It is common practice to use supplementary cementitious materials (SCMs) in the production of concrete. The use of SCMs as a partial replacement for cement results in more durable, higher performing concrete, lower energy consumption, and reduced green gas emissions. The most common SCMs are industrial byproducts such as fly ash, ground granulated blast-furnace slag (slag cement), and silica fume. There are also some natural pozzolans being used in the concrete industry such as calcined shale, calcined clay, and metakaolin. There are many beneficial effects of using SCMs for both fresh and hardened concretes, including enhanced workability, reduction in bleeding, reduction in the heat of hydration, strength gain with time, and reduced permeability and improved resistance to chemical distress. The level of improvement achieved differs among the SCMs. Although fly ash is the most commonly used SCM, others are also being used due to a shortage of fly ash. The objective of this synthesis is to document state DOT practices for using SCMs in concrete. Information to be gathered includes (but is not limited to): SCMs permitted by state DOT specifications; Process for selecting the types and replacement rates of SCMs; Documented benefits of using a particular SCM; Alternates adopted when preferred SCMs are not available;State DOT policies and guidelines for the use of SCMs (temperature, mixing, etc.); and Practices for controlling the quality of SCMs.
Language
- English
Project
- Funding: $55,000
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Contract Numbers:
Project 20-05, Topic 55-05
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Sponsor Organizations:
National Cooperative Highway Research Program
Transportation Research Board
500 Fifth Street, NW
Washington, DC United States 20001American Association of State Highway and Transportation Officials (AASHTO)
444 North Capitol Street, NW
Washington, DC United States 20001Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Project Managers:
Gause, Jo
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Performing Organizations:
, Germany City, United States -
Principal Investigators:
Armaghani, Jamshid
- Start Date: 20231025
- Expected Completion Date: 20230425
- Actual Completion Date: 20230425
Subject/Index Terms
- TRT Terms: Cement; Quality control; Silica fume; State departments of transportation; Sustainable development; Waste products (Materials)
- Subject Areas: Environment; Highways; Materials;
Filing Info
- Accession Number: 01887171
- Record Type: Research project
- Source Agency: Transportation Research Board
- Contract Numbers: Project 20-05, Topic 55-05
- Files: TRB, RIP
- Created Date: Jul 10 2023 9:12PM