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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. 2 figs.

Inventors:
; ; ;
Publication Date:
Research Org.:
New Jersey Institute of Technology
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
541716
Patent Number(s):
US 5,681,384/A/
Application Number:
PAN: 8-427,045
Assignee:
New Jersey Inst. of Tech., Newark, NJ (United States) PTO; SCA: 360603; 010800; PA: EDB-97:141839; SN: 97001865581
DOE Contract Number:  
FG22-90PC90299
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 28 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 01 COAL, LIGNITE, AND PEAT; CONCRETES; MORTARS; COMPRESSION STRENGTH; FLY ASH; WASTE PRODUCT UTILIZATION; CALCIUM OXIDES; OPTIMIZATION

Citation Formats

Liskowitz, J.W., Wecharatana, M., Jaturapitakkul, C., and Cerkanowicz, A.E. Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash. United States: N. p., 1997. Web.
Liskowitz, J.W., Wecharatana, M., Jaturapitakkul, C., & Cerkanowicz, A.E. Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash. United States.
Liskowitz, J.W., Wecharatana, M., Jaturapitakkul, C., and Cerkanowicz, A.E. Tue . "Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash". United States.
@article{osti_541716,
title = {Method for increasing the rate of compressive strength gain in hardenable mixtures containing fly ash},
author = {Liskowitz, J.W. and Wecharatana, M. and Jaturapitakkul, C. and Cerkanowicz, A.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. 2 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}