The energy consumed in the process of comminution highly depends on the mechanical properties of the materials being ground, which is controlled by the constituent minerals, their relative abundance and the texture. The quantitative description of textural information is essential in determining which textural characteristics can be attributed to certain mineral processing behaviours. The researcher’s opinions on the effect of different textural elements on the grindability differ. A correlation which can attribute numerical crushability and grindability values to certain textural features have not been established yet, however some general conclusions can be drawn. The effect of the mineralogical constitution is negligible, but the variation in hardness and the texture has a great impact.

The two most common used mechanical test in the aggregate industry for quality control are the resistance to wear (micro-Deval) and resistance to fragmentation (Los Angeles) tests. The quality of aggregates strongly depends on the textural, structural, and mineralogical features of the crushed material. These rock properties were experimentally studied on andesite samples from Tállya quarry. The mineralogical and chemical composition of samples were determined, textural observations were made on thin sections. The alteration was quantified using the chemical composition and mineralogical data. Micro-Deval and Los Angeles tests were conducted on the samples. The micro-Deval indices and the Los Angeles values showed similar trends, although the different type of stresses. The results showed that the examined mechanical properties of the Tállya andesites are complexly influenced by the textural and structural features, mineralogical composition, and alteration, however alteration has one of the most significant effects.