C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/04 (2006.01)
Patent
CA 2477539
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.
Ce document décrit des compositions fournies pour accroître la conductivité électrique du béton ou de matériaux de composition contrôlée à faible résistance (remblai fluide). Une composition pour la fabrication du béton contient de 1 % à 30 % (au poids) de ciment portland, de 1 % à 30 % (au poids) de cendres volantes présentant une concentration en carbone de 12 % (mesurée par perte à l'ignition), de 40 % à 90 % (au poids) d'agrégat, de 0,1 % à 20 % (au poids) de fibre de carbone ainsi qu'une quantité d'eau suffisante pour permettre la prise du béton. Une autre composition produisant un remblai fluide cimentaire autoplaçant contient de 1 % à 30 % (au poids) de ciment portland, de 5 % à 85 % (au poids) de cendres volantes, de 0,1 % à 20 % de fibres de carbone ainsi qu'une quantité d'eau suffisante pour assurer la prise du mélange et la formation d'un matériau présentant une résistance à la compression maximale de 8,3 MPa.
Bischke Robert F.
Noegel John J.
Ramme Bruce W.
Setchell Richard H. Jr.
Mccarthy Tetrault Llp
Wisconsin Electric Power Company
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