Marcelino Martínez,

compromise and quality.

Own quarries

in Spain, Portugal and Venezuela.

The best product

in less time than ever.

Whole service including

the best quality and problem-solving.


Granite blocks production is a process which has a lot of useless material. That aforementioned material was transported and taken away in debris places but that provoked a damage in the environment. In order to solve that inconvenient in 2002 we have run a sandstone clasification and grinding plant in Cadalso de los Vidrios (Madrid). Since this plant has been created, all debris and esterile materials are recycled and turned into diverse grain sizes of sandstone, which are supplied to concrete plants, terrazzo factories, building materials warehouses, etc.

The average annual production in these years is between 250,000 and 300,000 tons and the common products taking into account its grain size are:

  • Artificial aggregates: 0/22,4 mm
  • Sands: 0/4 and 0/2 mm
  • Rolled gravel: 2/4 mm
  • Gravels: 4/8 mm
  • Gravels: 8/20 and 20/40 mm
  • Loose stones: 40/70 mm
  • Broken blocks: 40/300 mm

Certificates for sandstone construction done by Bureau Veritas :o:

  • 0/4, 4/8, 8/20. Norm UNE EN 12620: 2003 + A1: Sandstone for concrete.
  • 0/4. Norm UNE EN 13139/ 2003 y UNE EN 13139/AC:2004: Sandstone for mortars.
  • 0/22,4 Norm UNE EN 13242: 2003 + A1:2008: Sandstone for granular layers and layers with hydraulic conglomeratings in order to use in firm structural layers.

Poligono de As Gándaras, Parcela 26, 36400 Porriño - Pontevedra (SPAIN)
Ph.: +34 986 330 713 | Fax: +34 986 332 765 | PO Box 47