An Exploratory Research on PCC Application of Crystalline Limestone: Effects of Limestone Crystallographic Characteristicson Hydraulic Activity

다국어 초록 (Multilingual Abstract)

Quicklime(CaO) is generally obtained through the calcination of limestone, the main component of which is calcium carbonate(CaCO3). Quicklime generates high-temperature heat when reacting with water, forming slaked lime(Ca(OH)2). The industrialsectors for limestone are determined by the hydraulic activity of slaked lime, which is obtained by measuring temperaturechanges during the hydration reaction. Accordingly, this study examined the different crystallographic characteristics of limestoneas affected by the geological origins of the regions where the limestones were produced, and how these characteristicsaffected hydraulic activity. Six limestone samples were collected from the Jecheon and Cheongsong areas and the hydraulic activitieswere measured in accordance with KS E 3077. The results indicate that limestone produced in the Cheongsong area, recrystallizedthrough metamorphism caused by hydrothermal alteration, hada larger grain size of calcite than that of the Jecheonarea, and displays a tendency of changing to marble. Limestone from the Cheonsong area showed more radical reaction in theearly stage of hydration compared to that ofthe Jecheon area. In addition, it was revealed that limestone having more impuritieslike SiO2 have lower hydraulic activity.

참고문헌 (Reference)

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