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Title: Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash

Abstract

The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points.

Inventors:
 [1];  [2];  [3];  [4]
+ Show Inventor Affiliations
  1. Belle Mead, NJ
  2. Parsippany, NJ
  3. Bangkok, TH
  4. (late of Livingston, NJ)
Issue Date:
Research Org.:
New Jersey Institute of Technology (Newark, NJ)
OSTI Identifier:
871207
Patent Number(s):
5681384
Assignee:
New Jersey Institute of Technology (Newark, NJ)
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 Y02W - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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DOE Contract Number:  
FG22-90PC90299
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; increasing; rate; compressive; strength; hardenable; mixtures; containing; fly; ash; relates; concrete; mortar; comprising; cement; construction; provides; mixture; exposing; aqueous; slurry; calcium; oxide; lime; prior; incorporation; contain; pre-reacted; particular; added; water; incorporating; specific; embodiment; treated; exposure; prepared; tested; time; mortar containing; comprising cement; mixtures comprising; hardenable mixture; compressive strength; calcium oxide; mixture containing; fly ash; aqueous slurry; specific embodiment; containing fly; hardenable mixtures; mixtures containing; /106/264/

Citation Formats

Liskowitz, John W, Wecharatana, Methi, Jaturapitakkul, Chai, and Cerkanowicz, deceased, Anthony E. Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash. United States: N. p., 1997. Web.
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Liskowitz, John W, Wecharatana, Methi, Jaturapitakkul, Chai, & Cerkanowicz, deceased, Anthony E. Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash. United States.
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Liskowitz, John W, Wecharatana, Methi, Jaturapitakkul, Chai, and Cerkanowicz, deceased, Anthony E. Wed . "Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash". United States. https://www.osti.gov/servlets/purl/871207.
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@article{osti_871207,
title = {Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash},
author = {Liskowitz, John W and Wecharatana, Methi and Jaturapitakkul, Chai and Cerkanowicz, deceased, Anthony E.},
abstractNote = {The present invention relates to concrete, mortar and other hardenable mixtures comprising cement and fly ash for use in construction. The invention provides a method for increasing the rate of strength gain of a hardenable mixture containing fly ash by exposing the fly ash to an aqueous slurry of calcium oxide (lime) prior to its incorporation into the hardenable mixture. The invention further relates to such hardenable mixtures, e.g., concrete and mortar, that contain fly ash pre-reacted with calcium oxide. In particular, the fly ash is added to a slurry of calcium oxide in water, prior to incorporating the fly ash in a hardenable mixture. The hardenable mixture may be concrete or mortar. In a specific embodiment, mortar containing fly ash treated by exposure to an aqueous lime slurry are prepared and tested for compressive strength at early time points.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
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Works referenced in this record:

Hydration of fly ash-portland cements
journal, July 1984

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