Ardósia de Valongo
Schist and Slate
Blueish-grey to dark grey homogenous slaty schist, compact, fine grained and presenting clear schistose cleavage.
Ardósia de Valongo – Nomenclature EN 12440, Lousa de Valongo
Campo – Valongo
Flooring and cladding as well as other interior and exterior applications.
]ROP Catalogue - http://rop.lneg.pt/rop/
Compression breaking load187 Mpa
Compression breaking load after freezing test168 Mpa
Bending strength56,9 Mpa
Volumetric weigth2820 kg/m3
Water absorption at N.P. conditions0,4 %
Aparent porosity1,2 %
Thermal linear expansion coeficient7,6 X 10 -6 perº C
Abrasion test (Amsler-Laffon)6,3 mm
Impact test: minimum fall height110 cm
Note: After 25 frost-defrost cycles the test pieces did not present any modifications in colour or structure.