The production of aggregates begins with the extraction of the industrial stone or rock by means of controlled detonations or mechanical extraction, depending on the characteristics of the site. Drills, which are equipped with dust collectors, bore the holes, whose depth and distance must be accurately calculated to avoid accidents, and to guarantee that the extracted stone has a suitable size for the grinding and classification stages. All these activities are carried out by specialized personnel, specially the detonations, which undergo exhaustive controls.
After the detonation, material must be loaded and transported. Bulldozers, backhoes and dumpers, which can load up to 50 tons, provide the production plants with the necessary raw material. The first step consists in transporting the stone to be ground to a primary grinder.
Stone, which can be ground to different sizes, is then selected by vibrating sieves. Once the materials are classified, they are either directly distributed to costumers or sent to different grinders for the production of other materials smaller in size or diameter, like sand. Artificial gravel, riprap or masonry are also examples of products that are commercialized. All the aggregates must comply with the existing granulometic curves, which requires constant laboratory analysis. Everything is reutilized in the extractive industry. There are no wastes left, and the remaining soil from the production processes is used for reforestation.