Study on Sound Insulation of Integrated Composite Wallboard Made of ALC and Rock Wool Panel

Abstract The integrated composite wallboard is a new type of prefabricated building enclosure made autoclaved aerated concrete (ALC) and rock wool panel, which can meet the thermal requirements cold areas in China without additional insulation. ALC divided into local four-sided supported plates by vertical horizontal ribs, makes have different sound insulation performance from single uniform material double-layer lightweight plates. authors investigate compare it with other wallboards. They found an apparent coincidence frequency region air-borne insulation, coincides natural vibration panel ALC. Such anastomosis effect seriously affects weighted reduction index Rw, reduces 6 ~ 8 dB. experiment objectively reflects adverse effects sandwiched structure provides reference for improving structurally upgrading wallboard.