Study on Three-phase Composite Conductive Concrete for Pavement Deicing

摘要

Using electrically conductive concrete for deicing is an emerging material technology. Three kinds of electrically conductive concrete compositing steel fiber, carbon fiber and steel fiber-graphite are measured, and the factors affecting conductivity are analyzed. A three-phase composite conductive concrete containing steel fiber, carbon fiber and graphite is developed specially for pavement deicing. According to the test of conductive property and the compressive strength of this concrete in laboratory, it is found that the dispersion uniformity of the carbon fiber and the concrete voids have a significant impact on conductivity. The composition ratio, preparation techniques and electrode layout mode of three-phase composite conductive concrete are studied and introduced. The specimen made of three-phase composite conductive concrete with electrical resistivity 322 Ω·cm is used in heating experiment, and is proved to have good heat effects, which can meet the requirements of pavement deicing.