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

The integrated composite wallboard made of ALC (autoclaved aerated concrete) and rock wool panel is a new type of prefabricated building enclosure wallboard, which can meet the thermal requirements of cold areas in China without additional insulation. The ALC of the integrated composite wallboard is divided into local four-sided supported plates by vertical and horizontal ribs. Therefore, its sound insulation performance is different from that of the single uniform material wallboard and the composite wallboard of double layers light thin plates. The sound insulation performance of the integrated composite wallboard is studied experimentally and compared with other lightweight wallboards. The air-borne sound insulation has obvious coincidence frequency region, and the coincidence frequency is consistent with the natural vibration frequency of the local four-sided supported plate of ALC. The anastomosis effect seriously affects the weighed sound reduction index Rw, which reduces the weighed sound reduction index by 6dB~8dB. The sound insulation experiment of ALC rock wool integrated composite wallboard objectively reflects the adverse effects of the sandwiched wallboard structure, which provides a reference for improving the sound insulation performance through the improvement of integrated composite wallboard structure.