| Summary: | 博士 === 國立臺灣科技大學 === 營建工程系 === 97 === The feasibility of reducing slag as cement-based cementing material was studied in this paper. The activity and replaceability of reducing slag in Taiwan Electric-Arc Furnace (EAF) Steel-Making Factory as cement-based cementing material were studied. Samples, which were from Electric-Arc Furnace Steel-Making Factories producing carbon steel and stainless steel, were sieved and dried without physical or chemical excitation after field sampling, and their physical and chemical properties as well as activities were tested. The samples were mixed according to the percentage of output and the activities of reducing slag before and after storing were studied. Then the application of reducing slag as elastic conductive coating and water conducting paint where water dispersing type acrylate copolymer emulsion as base and cement, reducing slag, graphite and conductive black as packing were studied. There are two types of conductive materials in the elastic conductive coating: one is traditional conductive graphite; the other is the mixture of powdered carbon waste of laser printer and conductive graphite as a comparative material. The study showed that the reducing slag of electric-arc furnace was a hydraulic, cementing and white powder, and contained materials such as CaO, SiO2,MnO,MgO, Fe2O3 and so on,.When using reducing slag of electric-arc furnace producing conductive coating, cement was to disperse with the addition of more reducing slag. It was calculated that the coating was a good Electromagnetic interference(EMI) shielded. EMI shielded was above 40dB in 10kHz; heating power density in water can reach 7W/cm2 and the decay time of conductivity of the coating can last for 210 to 450 days.
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