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Title: 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 a quantity of spray dryer ash (SDA) and water to initiate a geopolymerization reaction and form 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 40%, and in some cases less than 20%, of the foam index of the untreated fly ash. An optional alkaline activator may be mixed with the fly ash and SDA to facilitate the geopolymerization reaction. The alkaline activator may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.

Inventors:
 [1]
  1. Park City, UT
Issue Date:
Research Org.:
Ceramatec, Inc. (Salt Lake City, UT)
Sponsoring Org.:
USDOE
OSTI Identifier:
1043828
Patent Number(s):
8177906
Application Number:
12/275,437
Assignee:
Ceramatec, Inc. (Salt Lake City, UT)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
DOE Contract Number:  
FG02-05ER84197
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Boxley, Chett. Treatment of fly ash for use in concrete. United States: N. p., 2012. Web.
Boxley, Chett. Treatment of fly ash for use in concrete. United States.
Boxley, Chett. Tue . "Treatment of fly ash for use in concrete". United States. https://www.osti.gov/servlets/purl/1043828.
@article{osti_1043828,
title = {Treatment of fly ash for use in concrete},
author = {Boxley, Chett},
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 a quantity of spray dryer ash (SDA) and water to initiate a geopolymerization reaction and form 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 40%, and in some cases less than 20%, of the foam index of the untreated fly ash. An optional alkaline activator may be mixed with the fly ash and SDA to facilitate the geopolymerization reaction. The alkaline activator may contain an alkali metal hydroxide, carbonate, silicate, aluminate, or mixtures thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {5}
}

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