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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 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:
 [1];  [2];  [3]
  1. Park City, UT
  2. Salt lake City, UT
  3. 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):
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
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
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 = {2012},
month = {5}
}

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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