Treatment of fly ash for use in concrete
Abstract
A process for treating fly ash to render it highly usable as a concrete additive. A quantity of fly ash is obtained that contains carbon and which is considered unusable fly ash for concrete based upon foam index testing. The fly ash is mixed with an activator solution sufficient to initiate a geopolymerization reaction and for a geopolymerized fly ash. The geopolymerized fly ash is granulated. The geopolymerized fly ash is considered usable fly ash for concrete according to foam index testing. The geopolymerized fly ash may have a foam index less than 35% of the foam index of the untreated fly ash, and in some cases less than 10% of the foam index of the untreated fly ash. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.
- Inventors:
-
- Park City, UT
- Salt lake City, UT
- Natick, MA
- Issue Date:
- Research Org.:
- Ceramatec, Inc. (Salt Lake City, UT)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1044045
- Patent Number(s):
- 8172940
- Application Number:
- 11/776,892
- Assignee:
- Ceramatec, Inc. (Salt Lake City, UT)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- DOE Contract Number:
- FG02-05ER84197
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Boxley, Chett, Akash, Akash, and Zhao, Qiang. Treatment of fly ash for use in concrete. United States: N. p., 2012.
Web.
Boxley, Chett, Akash, Akash, & Zhao, Qiang. Treatment of fly ash for use in concrete. United States.
Boxley, Chett, Akash, Akash, and Zhao, Qiang. Tue .
"Treatment of fly ash for use in concrete". United States. https://www.osti.gov/servlets/purl/1044045.
@article{osti_1044045,
title = {Treatment of fly ash for use in concrete},
author = {Boxley, Chett and Akash, Akash and Zhao, Qiang},
abstractNote = {A process for treating fly ash to render it highly usable as a concrete additive. A quantity of fly ash is obtained that contains carbon and which is considered unusable fly ash for concrete based upon foam index testing. The fly ash is mixed with an activator solution sufficient to initiate a geopolymerization reaction and for a geopolymerized fly ash. The geopolymerized fly ash is granulated. The geopolymerized fly ash is considered usable fly ash for concrete according to foam index testing. The geopolymerized fly ash may have a foam index less than 35% of the foam index of the untreated fly ash, and in some cases less than 10% of the foam index of the untreated fly ash. The activator solution may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 08 00:00:00 EDT 2012},
month = {Tue May 08 00:00:00 EDT 2012}
}
Works referenced in this record:
Effects of Carbon on Air Entrainment in Fly Ash Concrete: The Role of Soot and Carbon Black
journal, March 1997
- Gao, Yu-Ming; Shim, Hong-Shig; Hurt, Robert H.
- Energy & Fuels, Vol. 11, Issue 2