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The Porphyry and Diabase Quarrying Company Ltd
  T. Ko¶ciuszki Str. 10
32-065 Krzeszowice
Poland
tel. (+4812) 2820619
tel./fax (+4812) 2822600
Email: zarzad@kruszywa.com

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Aleksander Kępka
AKOMI Kraków 

The uses of porphyry and diabase aggregate

  1.  Broken stone 31.5-50 mm for railroad works. Polish Standard PN-B-11114;1996. A certificate  No 80/98 issued by GIK (Main Railway Inspectorate) allows its use in building and maintenance of track structure for the whole railroad system


  1. Broken stone 31.5-63 mm for road works. According to the results of tests, it meets the requirements of the 1st class, 1st grade set by Polish Standard (PN-B-1112:1996)It can be used as underlying for roads with traffic of heavy and very heavy load, as substructure for squares, and for draining works.

  2. Clinker 20-31.5 mm and 4-31.5mm for road, railroad and construction works (concrete). Meets the requirements of the 1st class, 1st grade (PN-B-1114:1996) ,according to the results of tests.

  3. Porphyry grit 2-6.3 mm 6.3-12.8 mm, 12.8-20 mm, and granulated fine mixture. Used for building of roads (asphalt concrets), abrasive, binding , and levelling layers. Results of tests allow their classification as 1st class, 1st grade (PN-B-1112:1996).Grit can be also used in construction to produce concrete B-50

  4. Unsorted stone 0-20mm,0-31.5 and 0-63 mm for road works( mechanically stabilised substructure, freeze resistant layers, ordinary concrete (B-20). The stone meets the requirements of the 1st class, 1st variety according to Polish Standard (PN-B-1112:1996). Other possible uses: foundations for squares, underlay for pavements, and as levelling and stabilising layer on the top of coarse material like broken stone.

  5. Sorted broken stone 250-300 mm. Used mainly for hydrotechnical construction, i.e. cladding of river banks, river bars, wing dams, filling of net baskets. Since its natural colours are of highly decorative quality, the material can be used to build wall enclosures, underpinning brick-works, flower beds, stone decorations, paving of squares. Its hardness and resistance to frost permit its use for elements of small constructions, resistant to changes of weather conditions.

  1. Diabase grit 2-6.3 mm 6.3-12.8 mm, 12.8-20 mm, and granulated fine mixture 0-4 mm. Used for building of roads (mineral-asphalt mixtures), abrasive, binding , and levelling layers. Results of tests allow their classification as 1st class, 1st grade (PN-B-1112:1996).Grit can be also used in construction to produce concrete B-50

  1. Diabase grit 2-6.3 mm 6.3-12.8 mm, 12.8-20 mm, and granulated fine mixture 0-4 mm. Used for building of roads (mineral-asphalt mixtures), abrasive, binding , and levelling layers. Results of tests allow their classification as 1st class, 1st grade (PN-B-1112:1996).Grit can be also used in construction to produce concrete B-50

STRONG, DURABLE, CHEAP