Electrically conductive concrete and controlled low strength materials having carbon fibers
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United States of America Patent
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Nov 23, 2004
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N/A
app pub date -
Aug 15, 2003
filing date -
Aug 15, 2003
priority date (Note) -
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Abstract
Compositions are provided for increasing the electrical conductivity of concrete or controlled low-strength materials (flowable fill). One composition sets to produce a concrete and includes from 1% to 30% by weight of portland cement; from 1% to 30% by weight of fly ash having a carbon content as measured by loss on ignition of greater than 12%; from 40% to 90% by weight of an aggregate; from 0.1% to 20% by weight of carbon fibers; and water in a sufficient amount such that the composition sets to a concrete. Another composition is a self-compacting, cementitious flowable fill composition that includes from 1% to 30% by weight of portland cement; from 5% to 85% by weight of fly ash; from 0.1% to 20% by weight of carbon fibers; and water in a sufficient amount such that the composition sets to a material having a compressive strength of 8.3 MPa or less.
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