Cava F.lli Bianchi - Dolomite, calcare, granulati industriali. Marmo macinato

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The quarried Dolimite type is saccharoidal dolomite limestone with a white-fleshy colour, known in the literature as "Pietra o Dolomia di Zandobbio".
It is presumed to be from the "Hettangian" era, contemporary to the "Dolomite at Conchodon". The material is currently mainly used to produce "Granulites" of various sizes.
 In the past however, until Roman times, it was used as an ornamental stone of a certain value; see for example the "Palazzo del Provveditorato" in "Piazza della Libertà" at Bergamo – lower town -, the Cantarini fountain, the library at Bergamo – upper town - and the Mondadori headquarters at Segrate.

The white Dolomite extracted from the Zandobbio quarry is ground and graded into a vast range of sizes that satisfy the demands of:

  • Zootechnic industries

  • Ceramic and flooring industries

  • Ready mixed and mortar products

  • Chemical industries

  • Glass industries

  • Iron and steel making industries

Characteristics and Commercial Use
The Dolimite type considered is defined as calcareous dolomite. Consequently it is comprised mainly of double calcium carbonate and magnesium with a lower order of calcium carbonate. 

The material has the following fundamental characteristics:

  • it is easily reduced to small grains or powder as it is medium hard.
  • it has a light colour
  • and finally, does not contain inopportune accessory chemical elements

The granulometry of the worked materials ranges from the lowest size of powder (0-0.1 mm) to chips (30-60 mm) with seven intermediary classifications.

Ther industrial uses are manifold and can be summarised into the following sectors and values:

  • the glass and ceramic industries
  • the chemical, paper, plastic and paint industries as well as in agriculture in fertilisers and as de-acidifiers for the land.
  • as inert material in concrete, ballast and road surfacing.
  • the coating and decoration industries
  • the binder and casting industries