多孔性混凝土铺装层吸声性能研究  

Sound absorption property of porous concrete pavement layer

作　　者：倪彤元[1] 邰惠鑫[1] 江晨晖[1,2] 

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014 [2]浙江建设职业技术学院,浙江杭州310000

出　　处：《新型建筑材料》2014年第3期17-19,共3页New Building Materials

基　　金：浙江省教育厅科研项目(Y201122010)

摘　　要：利用驻波管分别对孔隙率为15％、17％、20％、22％、25％和厚度为40mm、50 mm、60mm的多孔混凝土铺装层试件进行了不同频率下吸声特性试验.实验结果表明,不同孔隙率试件的低频段声波吸收能力相差不大.随着孔隙率的增大,吸声系数也增大;在孔隙率相同的情况下,随着多孔混凝土铺装层厚度的增加,中低频段的吸声系数有增大的趋势,而在高频段的吸声系数则有减小的趋势;多孔混凝土铺装层的配比设计应综合考虑渗透性、强度、吸声性能等因素,从吸声性能考虑,推荐多孔混凝土铺装层的孔隙率为17％～22％.In this paper,sound absorption property tests of porous concrete pavement specimens with porosity of 15％,17％,20％,22％,25％ respectively,and a thickness of 40 mm,50 mm,60 mm,have been done by standing wave tube in different frequencies.The experimental results showed that the different porosity specimens＇ sound absorption capacity shows little difference in low-frequency sound.As the porosity of porous concrete pavement layer specimen increases,the absorption coefficient increases.Under the same porosity,as the porous concrete pavement thickness increases,the sound absorption coefficient in low-frequency tends to increase,and in high-frequency,it tends to decrease.The mix design of porous concrete pavement should be considered about permeability,strength,acoustic performance and other factors.The paper recommends porous concrete pavement porosity ranges 17％～22％ from the sound absorption performance considerations.

关 键 词：吸声系数 吸声性能 驻波管法 多孔性混凝土铺装层 

分 类 号：TU528.2[建筑科学—建筑技术科学]