摘要
以水泥和40~80目、20~40目、10~20目三种粒径石英砂等为主要原料,在压缩比1.1、1.2、1.3时制备微孔吸声材料,试样各频段吸声系数不同,但在100~1600Hz各频段的吸声系数最高,且试样抗压强度和抗折强度差别不大,最小分别为19.6、3.5MPa。选取10~20目粒径石英砂以压缩比1.3配制厚度为20mm的试样,后留100mm空腔混响室法测试降噪系数达0.74。
The porous sound material was prepared at the compression ratio of 1.1,1.2 and 1.3,with cement and quartz sand of 40~80 mesh,20~40 mesh and 10~20 mesh as the main raw materials.Although the sound absorption coefficient of each frequency band was different,the sound absorption coefficient at 100~1600 Hz is the highest.Moreover,the compressive strength and flexural strength of the samples are with the minimum value 19.6 MPa and 3.5 MPa respectively.In addition,the 10~20 mesh quartz sand with compression ratio of 1.3 was selected to prepare 20 mm thick sample,and the noise reduction coefficient was 0.74 by leaving 100 mm cavity reverberation chamber.
作者
王卫东
WANG Weidong(JiangSu Newcon Enviro Engineering Co.,Ltd.,Nanjing210042,China)
出处
《低温建筑技术》
2020年第9期44-48,共5页
Low Temperature Architecture Technology
关键词
石英砂
吸声材料
吸声系数
强度
quartz sand
sound absorbing material
sound absorption coefficient
strength
作者简介
王卫东(1986-),男,江苏徐州人,工程师,主要从事新型建筑材料及声学材料研究。
