ABSTRACT
Natural rock differs in many aspects from the mortars used in the experiments. However, many types of natural rock exist and some of them may show a similar behaviour with respect to rock cutting tool wear. Experiments at different feeds and cutting velocities were carried out on 5 types of sandstone. The wear modes observed in the scraping test experiments on artificial rock were also observed in the experiments on the sandstones. Scraping test experiments on a feldspar containing mortar showed that the specific wear of wedge steel chisels was the same as that for a comparable quartz bearing mortar. The type of cementation, texture and mineralogy of natural rock types differ mutually and from mortar. These differences may influence the rate and type of wear. However in case of the five sandstones, in general the same trends of rate and type of wear were observed in both the experiments on natural rock and artificial mortar rock.
