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For utilizing waste stone and stone powder sludge generated from domestic quarry and cutting process of stone plates, the manufacturing technology of artificial stone plate as a building material was investigated. By introducing firing method and hydrothermal synthesis, artificial stone plates were manufactured with various conditions. In order to find out the optimum condition at each method, several experiments were carried out changing the mixing conditions of raw material, press pressure, firing temperature, firing time in firing method and the press pressure, reaction time, vapour pressure, amounts of slaked lime and amounts of sand in hydrothermal synthesis experiment. Also the physical properties of artificial stone were investigated. In the firing method, the shrinkage rate of manufactured stone plate was very low at the mixing condition of 75% stone powder sludge, 20% clay and 5% feldspar and much more stone powder sludges could be utilized at that condition. Also as increasing the press pressure, sintering temperature and sintering time, the physical properties of artificial stone were improved. From XRD analysis, it was found that their crystals were mainly composed of (alpha)- quartz with anothite and hematite as minorities. In the hydrothermal synthesis, the shrinkage of manufactured stone plate was not observed and the physical properties of artificial stone were improved as the press pressure, reaction time and vapour pressure were increased. Also it was found that the physical properties of artificial stone were improved by increasing amounts of sand as the additive. From XRD analysis it was found that their crystals were mainly composed of calcium silicate with tobermorite and xonotlite as minorities. (author). 21 refs., 9 tabs., 59 figs.