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This study dealt with the properties for fly ash of combined heat power plant and application for concrete industry. For this purpose, fly ash sampled Ulsan combined heat power plant and analyzed for physical and chemical properties. As analyzed results of fly ash, contents of SiO2 and Al2O3 in the fly ash of Ulsan were less than those of Thermo-electric power plant(Boryunt), but contents of CaO were ten times as much as those of Boryung. because of these differences, it is expected that pozzolanic activity of concrete using fly ash of Ulsan will be different from another fly ash. Concrete specimens were tested to evaluate concrete performance when 10 to 50 percent of the portland cement by weight in the concrete mix was replaced with fly ash of combined heat power plant. As test results, workability and consideration in the fresh concrete were increased and concrete strength was showed more than 400kg/cm2 for the required age. this study would be provided valuable data for the practical utilization of fly ash(combined heat power plant). In the future, properties of fly ash concrete including long term strength, elapsed time, pozzolanic activity, modulus of elasticity, sulfate resistance, shrinkage, freeze-thaw durability and so on will be studied.

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UCI(KEPA) : I410-ECN-0101-2009-540-012933017