 | Natural Aggregates
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Each quarrying activity produces a morphological modification of the territory and must be realized in agreement with the geological characteristics of the ore body and of surrounding morphology. Buzzi Unicem runs several quarries and invests human and financial resources to provide recovery of environment in the quarries areas in order to mitigate impact related to extraction activities. Inside the quarry stoping of compact rocks is realized with explosive. After the blast, biggest sized material is reduced in smaller pieces suitable for subsequent processing. Handling and transport are performed with tractors and excavators and, with help of power loaders, material is loaded on dumpers and transported to crushing plants. Aggregates for concrete production undergo a first crushing and then a dry screening is performed and/or a second crushing. Subsequently material desilting is performed to separate unwanted smallest sections (silts). Sieving allows classification of aggregates following granulometric classes to make a correct compound of mix for concrete.
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