Analysis of the measurement results of apparent sound reduction index (R’w) of lightweight expanded clay party walls
This document is born from the partnership with University of Ferrara and University of Florence and focuses on the behaviour of Expanded Clay blocks for soundproofing party walls in residential buildings. Since 2000, there have been realized about 120 tests of apparent sound reduction index (R’W) on expanded clay party walls in residential buildings. Aim of these measurements was to verify the reliable soundproofing of these walls that fully meets Italian regulatory requirements. These walls are 25 and 30 cm thick, laid with traditional mortar and with plaster on both sides. Excellent results show the reliability of this kind of walls: in 98% of cases the apparent sound reduction index R’W is over 50 dB as requested by Italian regulation for residential buildings.