TWIN LAYER SCREED

For twin-level screed, the cellular concrete is used above all as an insulating sub-base. As a light screed, it is used at the level of tubing as a support to the traditional screed, of which it reduces the thickness and the weight. Furthermore, cellular concrete greatly improves the muffling of noise at the tread level, due to its discontinuous structure.

FORMULATION FOR SUB-STRATA AT DIFFERENT DENSITIES

DENSITY	CONCRETE	WATER	FOAM	RESISTANCE
300 kg/m3	250 kg	125 volume in litres	870 volume in litres	5 kg/cm2
400 kg/m3	331 kg	165 volume in litri	845 volume in litri	10 kg/cm2
500 kg/m3	416 kg	208 volume in litres	666 volume in litres	17 kg/cm2
600 kg/m3	495 kg	228 volume in litres	632 volume in litres	25 kg/cm2