ON STONE CLADDING ネ 實 山 中 醐 m 齟 醐 剛 叨 晒 Sellling compound is used at thejoints of stone cladding f( 〕rwaterproofing requirements . However , dark discol − oration and pattern staining of thejoint area have been occurring . Therefore , this research was made to quantita − tively evaluate the effects en the joint area of sealing compound type , joint direction , and stain removal by cleaning to make the staining problem clear . The f{)110Wing information was obtained : i, Adequate evaluation of

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... aining due to sealing compound was made by measurements of color d 正 fferences and glossiness of stone and microscepic observation of undesirable substance on stone . It was quantitatively confirmed that compared to other sealing compounCls , si 置 孟 cone based sealing compound caused staining remarkably . ii . Staining of stone due to silieone based sealing compound was prominent in the area below horizontal joints and silicone oil propagation on the stone surface was of a more dQminant transf α mechanlsm than di ∬Usion. liL Decrease in color differences and increase in glossiness due to cleaning were noted confirming staining removal ef艶 ct but tenden 〔 ry for increased staining due to exposure after cleaning was observed . The reason f{〕r this was that the stone surface was new 且 y exposed due to cleaning . lhe knowledge and findings obtained in this research are essential