微孔砂质透水铺装材料吸声降噪性能研究  

Research on Sound Absorption and Noise Reduction Performance of Microporous Sand Permeable Paving Material

作　　者：唐莉 刘东霞 尹红燕 TANG Li;LIU Dong-xia;YIN Hong-yan

机构地区：[1]重庆交通职业学院,重庆402247

出　　处：《内蒙古公路与运输》2021年第5期11-14,共4页Highways & Transportation in Inner Mongolia

基　　金：重庆市教育委员会科学技术研究项目(KJQN201905705)。

摘　　要：随着城市化不断推进,路面噪音污染对人们工作和生活的影响日益突出,研究吸声降噪路面意义重大。文章以微孔透水铺装材料为研究对象,采用JTZB驻波管系统研究透水铺装材料不同孔隙率、孔径、铺装厚度及材料含水率对吸声性能的影响。结果表明:孔隙率为18%的微孔透水材料对频率为400Hz~600Hz范围内的噪声吸声效果较好,吸声系数值最大可达0.8;孔径较大的透水材料消耗声能少,吸声系数低;孔径较小的透水材料消耗声能多,吸声系数高,孔径为50μm~350μm范围内的微孔透水材料对频率为400Hz~800Hz范围内的噪声吸声系数最高,对800Hz以上的噪音,随着噪音频率的提高,吸声系数不断减小;较厚的微孔透水材料吸声性能较好,适当增加材料厚度,可以有效改善微孔透水材料对低频噪音的吸声特性;含水率10%以下的微孔透水材料对400Hz~600Hz噪音吸声效果较好。With the continuous progress of urbanization,the impact of road noise pollution on people’s work and life has become increasingly prominent.It is of great significance to study sound absorption and noise reduction pavement.Taking microporous permeable pavement materials as the research object,the JTZB standing wave tube system was used to study the influence of different porosity,pore diameter,pavement thickness,and material moisture content of permeable pavement materials on sound absorption performance.The results show that:Microporous permeable bricks with a porosity of 18%have a good sound absorption effect for noise in the frequency range of 400 Hz to 600 Hz,and the maximum sound absorption coefficient can reach 0.8;the porous brick with larger pore diameter consumes less sound energy and has low sound absorption coefficient;the porous permeable brick with smaller pore diameter consumes more sound energy and has high sound absorption coefficient,and the porous permeable brick with a pore diameter of 50μm-350μm has the highest sound absorption coefficient for noise in the frequency range of 400 Hz~800 Hz.For noise above800 Hz,with the increase of noise frequency,the sound absorption coefficient continues to decrease.Thicker microporous permeable bricks have better sound absorption performance.Appropriate increase in material thickness can effectively improve the sound absorption characteristics of microporous permeable bricks for low-frequency noise.Microporous permeable bricks with a moisture content of less than 10%have a better sound absorption effect on 400 Hz~600 Hz noise.

关 键 词：微孔透水砖 吸声系数 孔隙率 性能研究 

分 类 号：TU58[建筑科学—建筑技术科学]