2. Manufacturing

2.1 Dense silico-calcareous

The following materials are used:

• 0 / 5 mm clean sand, some of which (5 to 10%) can be ground to a fineness of around 1,000 to 2,000 cm ² / g (Blaine fineness);

• quicklime CaO. The ratios are as follows (by mass):

  • fine sand: 12,

  • quicklime CaO : 1 ;

• water: around 4 to 8% of the mass of dry matter;

• colorants (possibly): pigments consisting of metal oxides.

The mixture of quicklime + sand + water is homogenized and then passed through reactors.

...