METASCHIST: A RAW MATERIAL ALTERNATIVE TO CLAYSTONE IN CEMENT PRODUCTION

The possibility of using metaschist as an alternative to claystone which is used as the main input in cement production has been investigated. In the experimental work, the metaschists and claystone were used to produce cement separately from the raw materials from their fields, and their qualities were determined. As a result of the tests carried out, it was understood that corrective ingredients (iron ore, bauxite etc.) would be needed in order to use the claystone because of its high SiO2 (silicate modulus 3.97) content. On the other hand, with the metaschist sample, it has been shown that it can form a raw meal composition singularly without the need for any corrective ingredients. Although, in the raw meal composition, the silicate module was found to be low (2.07) the aluminum module was high (2.43), They were found to be within the cement quality parameters. As a result of detailed mineralogical studies, it has been determined that the metaschist has a quartz content about 13% lower than claystone. Knowing that the quartz content is considered to have adverse effects on many production processes such as grindability, burnability and abrasion, it can be argued that the use of metaschists results in the production of cement being more economical and of good quality due to its mineralogical structure