Opalized tuff belongs to the group of pyroclassic rocks.
It is hydrothermally modified and has pozzolanic properties. It is especially light and hydroscopic and is characterized by high porosity.
Particle density without pores at 25°C
Water absorption
SiO2
Al2O3
Fe2O3
CaO
MgO
TiO2
K2O
Na2O
Chemical industry: the silicate artificial zeolite
Construction industry: thermal insulation materials and plasters
Cement industry: white cement and correction raw material
Rubber and paper industry: correction raw material
Ceramic industry: acid resistant tiles
Chamotte industry: light silica burners
For water purification: as a substitute for hydroanthracite
For obtaining refractory concrete
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