The slag is divided into large blast furnace slag and steel slag to more than 470 million tons emissions in Korea. Much of the blast furnace slag is a trend that recycled material for cement is recognized as a new resource from waste. This material can replace the currently used industrial fibers (glass, basalt, carbon fibers). Slag fibers have economic and environmental benefits because of the waste recycling. Fibers, produced by mixing various slag, have a chemical composition similar to that of basalt fibers. It is anticipated that this will be possible as alternative fibers for basalt fibers that can overcome price competitiveness while protecting natural resources. As a result of measuring the tensile strength in this study, the average is measured to be over 3000 MPa. Therefore, it is expected to be applicable in industrial applications.
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