Pórfiro Ácido

Granite

Pórfiro Ácido

Granite

Breccious igneous rock, of variable granularity, with reddish-brown colour and dark green punctuations.

Other Names
Pórfiro ácido, Robrato- Nomenclatura EN12440
Petrographic Classification
Acid Porphyry
Occurrence
Torrão – Alcácer do Sal
Origin
Setúbal
Common Uses
Interiors and exteriors, in this case with some reservations in very humid climates, possibility of accentuation of some of the natural spots.
Available Reserves
Rare
Source
Catalog ROP of LNEG (http://rop.lneg.pt/rop/FormTipo.php)

Properties

  • Compression breaking load
    140 Mpa
  • Compression breaking load after freezing test
    150 Mpa
  • Bending strength
    27,7 Mpa
  • Volumetric weigth
    2640 kg/m3
  • Water absorption at N.P. conditions
    0,1 %
  • Aparent porosity
    0,3 %
  • Thermal linear expansion coeficient
    7,8 X 10 -6 perº C
  • Abrasion test (Amsler-Laffon)
    0,3 mm
  • Impact test: minimum fall height
    60 cm

  • Note: After 25 frost-defrost cycles the test pieces did not present any modifications in colour or structure.

Companies

Processing
Extraction
  • Granitos de Maceira, S.A.
    Sintra
  • Transgranitos – Mármores e Granitos do Alto Tâmega, Lda.
    Vila Pouca de Aguiar