既有GRC多孔条板轻质隔墙隔声性能提升实验研究

Experimental Study on Improvement Sound Insulation Performance of Existing GRC Perforated Slats Light Partition Wall

针对既有建筑中常用的单层GRC(glass-fiber reinforced cement)多孔条板轻质隔墙隔声量低的问题,通过综合对比分析GRC多孔条板双层墙与GRC多孔条板附加复合隔声构件隔墙两种构造的隔声特性,发现复合隔声构造在既有建筑改造中的优势.基于复合隔声构造中的声学材料物理性能以及带有空气间层的复合构造特征等方面的研究,结合复合隔声构造理论分析和实验测试验证.通过优化复合隔声构造,提出GRC多孔条板轻质隔墙附加双层和三层硅酸钙板复合构造的隔声性能综合提升设计方案.研究结果表明:附加复合隔声构造后的GRC多孔条板隔墙有效改善了墙体振动引起的隔声量下降问题,提高了墙体全频段隔声性能.

The sound insulation defects of single-layer GRC(glass-fiber reinforced cement)perforated slats light partition wall commonly used in existing buildings are discussed.By comparing and analyzing the sound insulation characteristics of GRC perforated batten double wall and GRC perforated batten partition wall with composite sound insulation components,the advantages of composite sound insulation structure in the reconstruction of existing buildings are found.Firstly,the physical properties of acoustic materials and the characteristics of the composite structure with air interlayer in the composite sound insulation structure are studied,and the composite sound insulation structure is theoretically analyzed and experimentally tested.By optimizing the composite sound insulation structure,the design scheme of improving the sound insulation performance of GRC perforated slatted light partition wall with two layers and three layers of calcium silicate board composite structure is put forward.The results show that the modified GRC perforated partition wall can effectively improve the problem of sound insulation reduction caused by wall vibration,and improve the sound insulation performance of the wall in all frequency bands.