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
|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|
The data shown in the table is only indicative.
PHOTO GALLERY: TWIN-LAYER SCREED