硅酸盐学报2011，Vol.39Issue(1)：158-163,6.
孔隙率和孔径对陶粒吸声材料吸声性能的影响
Effects of Porosity and Pore Size on Sound Absorption Characteristic of Ceramsite Porous Material
摘要
Abstract
The methods of air-flow resistvity and microscopic analysis were used to quantitatively characterize the porosity of the porous materials and investigate the sound absorption of the porous sound-absorbing materials like ceramsite as an aggregate at different porosities or median pore diameters. The results show that the noise reduction coefficient (aNRC) of the ceramsite sound-absorbing material increases at the beginning and then decreases with increasing the air-flow resistivity at the sound absorption of 1144.07 Pa-s/m3. The sound absorption decreased with decreasing the median pore diameter in the size range of 0.71-1.44mm. The aNRC could increase with the increase of the effective porosity. The high-frequency sound absorption was more sensitive to the changes of the internal porosity of the material.关键词
陶粒多孔材料/流阻/孔隙率/中值孔径/吸声性能Key words
ceramsite porous materials/ air-flow resistivity/ porosity/ median pore diameters/ sound absorption characteristics分类
建筑与水利引用本文复制引用
骆翔宇,李文芳,金雪莉,曾令可..孔隙率和孔径对陶粒吸声材料吸声性能的影响[J].硅酸盐学报,2011,39(1):158-163,6.基金项目
国家自然科学基金(51008126)资助项目 （51008126）
华南理工大学中央高校基本科研业务费专项资金(2009ZM0067)资助项目. （2009ZM0067）
