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Title: Controlling the set of carbon-fiber embedded cement with electric current

Abstract

A method for promoting cement or concrete set on demand for concrete that has been chemically retarded by adding carbon fiber to the concrete, which enables it to become electrically conductive, sodium tartrate retardant, and copper sulfate which forms a copper tartrate complex in alkaline concrete mixes. Using electricity, the concrete mix anodically converts the retarding tartrate to an insoluble polyester polymer. The carbon fibers act as a continuous anode surface with a counter electrode wire embedded in the mix. Upon energizing, the retarding effect of tartrate is defeated by formation of the polyester polymer through condensation esterification thereby allowing the normal set to proceed unimpeded.

Inventors:
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174893
Patent Number(s):
6749682
Application Number:
10/134,171
Assignee:
UT-Battelle, LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Mattus, Alfred J. Controlling the set of carbon-fiber embedded cement with electric current. United States: N. p., 2004. Web.
Mattus, Alfred J. Controlling the set of carbon-fiber embedded cement with electric current. United States.
Mattus, Alfred J. Tue . "Controlling the set of carbon-fiber embedded cement with electric current". United States. https://www.osti.gov/servlets/purl/1174893.
@article{osti_1174893,
title = {Controlling the set of carbon-fiber embedded cement with electric current},
author = {Mattus, Alfred J.},
abstractNote = {A method for promoting cement or concrete set on demand for concrete that has been chemically retarded by adding carbon fiber to the concrete, which enables it to become electrically conductive, sodium tartrate retardant, and copper sulfate which forms a copper tartrate complex in alkaline concrete mixes. Using electricity, the concrete mix anodically converts the retarding tartrate to an insoluble polyester polymer. The carbon fibers act as a continuous anode surface with a counter electrode wire embedded in the mix. Upon energizing, the retarding effect of tartrate is defeated by formation of the polyester polymer through condensation esterification thereby allowing the normal set to proceed unimpeded.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {6}
}

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Works referenced in this record:

Electrochemical Oxidation of Cyanide Complexes with Copper at Carbon Fibre
book, January 1996


Electrical conductivity of Portland cement mortars
journal, April 1996


Electrical percolation phenomena in cement composites containing conductive fibres
journal, August 1996


Canadians Create Conductive Concrete
journal, May 1997