Research On Preparation Technology And Performance Of Carbon Fiber Electrically Conductive Concrete For Heating

Ice and snow on road in winter is a potential safety hazard to transportation. In recent years, more and more concerns were drawn to the methods of removing ice and snow on road. Cut-short carbon fiber was applied in conductive concrete, however its manufacturing technology was still not mature. In this study, continuous carbon fiber was used and self-heating concrete was prepared.Heat-resistance aging test, alkali resistance aging test and frost resistance test were done to get optimized result for the surface carbon coated formula, that is epoxy resin: phenolic resin = 3:2. The surface of the carbon fiber heating element was resin coated to enhance its durability and avoid its leakage risk.Through the preliminary trial and optimization experiment, we get an optimized result that carbon fiber laying at an interval of 8cm, depth of for 4cm, in parallel. Comparision with the finite element software MARC simulation of warming figure was carried out.Concrete slab's heat power per unit area, including the slab preparation needed, analysis of melting ice, warming environment rising temperature on the slab, influence of different voltage of power, thermal insulation layer of fiber and influence of wind speed were investigated.Comprehensive efficiency of concrete slabs for ice melting was measured. When voltage reach up to 36V, work rate can reach up to 1000 W/m~2, concrete slab can melt 4mm thick ice in half an hour and, the size of the remind ice will not affect traffic, which bespeaks that the heating concrete is appliable.