Abstract
The use of electrically conductive concrete for pavement deicing is an emerging material technology. Three kinds of electrically conductive concrete composites, namely, steel fiber, carbon fiber, and steel fiber-graphite, are measured, and the factors that affect conductivity are analyzed. A three-phase composite conductive concrete containing steel fiber, carbon fiber, and graphite is developed for pavement deicing. The conductive property test and the compressive strength of this concrete in the laboratory show that the dispersion uniformity of the carbon fiber, as well as the concrete voids, significantly affects conductivity. The composition ratio, preparation techniques and electrode layout mode of the three-phase composite conductive concrete are introduced and studied. A specimen consisting of a three-phase composite conductive concrete with an electrical resistivity of 322Ωcm is used in the heating experiment and is proven to render satisfactory heat effects that meet the requirements of pavement deicing.
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