USE OF ZEOLITIC TUFFS AS CEMENT ADDITIVES, BUILDING STONE AND REMOVAL OF HEAVY METAL CATIONS

The chabazitic and phillipsitic tuffs presented in this study are located in the south of Sandikh (Afyon-west Anatolia). In this district there are important zeolitic resources. In petrographic investigations of tuffs, optical microscopy, SEM, and XRD methods were used for mineral analysis. Trachyte/trachyandesitic tuffs contain chabazite and tephriphonolitic tuffs contain chabazite and phillipiste. According to the XRD results, chabazite occurs in the Ca-form; phillipsite is in the Na-K, K, and K,Ca-forms. Zeolite contents of tuffs (52.41-58.59 wt. %) were determined by using a heavy liquid method.