磷石膏基复合吸声材料的制备与性能研究

关键字：磷石膏基,复合,吸声材料,制备,性能,研究

（1.黄冈师范学院 建筑学院，湖北 黄冈  438000；
2.武汉理工大学，硅酸盐国家重点实验室，湖北 武汉  430070）

    摘要：以煅烧磷石膏为原料，分别研究了膨胀珍珠岩、AE-200造孔剂、玄武岩纤维等对磷石膏基复合材料吸声性能和力学性能的影响，结合微观结构对其吸声机理进行分析。结果表明，掺入膨胀珍珠岩，材料的吸声系数有明显提高，掺量为8%时，高频段的吸声系数明显上升；随着造孔剂掺量的增加，材料的吸声系数出现波动现象，在500 Hz处有最大的吸收峰；随着玄武岩纤维掺量的增加，材料在6个频率下的吸声系数均下降。最佳配合比为：玄武岩纤维掺量1.0%，AE-200造孔剂掺量0.6%，水膏比0.8，膨胀珍珠岩掺量4%，制备的磷石膏基吸声材料平均吸声系数为0.55，抗折、抗压强度分别为1.2、1.4 MPa。
    关键词：磷石膏；吸声材料；吸声系数；力学性能
    中图分类号：TU55+2        文献标识码：A        文章编号：1001-702X（2017）12-0089-05

Preparation and properties of composite sound absorbing material made by phosphogypsum
HUANG Youzhen1，LI Yubo2，LI Xianliang2，MA Baoguo2，SU Ying2，ZHU Lu2
（1.Construction Engineering Institute of Huanggang Normal University，Huanggang 438000，China；
2.State Key Laboratory of Silicate Materials for Architectures，Wuhan University of Technology，Wuhan 430070，China）

    Abstract：In this paper，the effects of the components of expanded perlite，AE-200 pore-forming agent and basalt fiber on the sound absorption performance and mechanical properties were studied by using burning phosphogypsum as raw material. The mechanism of sound absorption was analyzed by microstructure analysis. The result showed that adding expanded perlite，the sound absorption coefficient increases obviously and the sound absorption coefficient of high frequency band increased obviously when the content of expanded perlite reached 8%. The sound absorption coefficient of the material fluctuated and the maximum absorption peak at 500 Hz with the increasing content of AE-200 pore-forming agent. With the increase of basalt fiber content，the sound absorption coefficient of the material decreases at six frequencies. The optimum mixing ratio was proposed as following：the basalt fiber was 1.0%，AE-200 pore-forming agent was 0.6%，the ratio of water to gypsum was 0.8 and expanded perlite was 4%. The average sound absorption coefficient of the material is 0.55，the flexural strength and compressive strength are 1.2 MPa and 1.4 MPa respectively.
    Key words：phosphogypsum，sound absorbing material，sound absorption coefficient，mechanical properties