Dynamic characteristics of the elastic layer materials of floating floor structures actualization

The results of the modern soundproofing materials used in floating floor structures dynamic characteristics experimental studies are presented. The work relevance is due to the need to update the soundproofing materials dynamic characteristics tabular values presented in SP 275.1325800.2016 “Enclosing structures of residential and public buildings. Sound insulation design rules”. The study examined the most common materials on the market: rock wool, polyethylene foam, needle-punched fiberglass mats and roll soundproofing materials. It is established that the maximum values of the elasticity dynamic modulus are demonstrated by rock wool materials, the minimum values are foamed polyethylene and fiberglass mats. The elasticity dynamic modulus dependences on thickness, density and load for different materials are revealed. For 30 mm thick rock wool under 10000 Pa load, the increase in density from 100 to 155 kg/m3 leads to an increase in modulus from 1.88 to 2.22 MPa. For needle-punched fiberglass mats with a load of 5000 Pa, an increase in thickness from 10 to 14 mm causes an increase in the modulus by 0.27 MPa. The study results allow to expand the possibilities of choosing soundproofing materials in the design and increase the impact noise reduced level index calculation accuracy.