摘要
根据铁路噪声的频谱特性,针对高性能水泥基吸声材料的制成工艺、吸声性能以及力学性能进行研究。高性能水泥基吸声材料以水泥作为主要胶结材料,以膨胀珍珠岩为骨料,采用二维压力挤压成型。其基本配合比采用胶结剂∶孔结剂∶骨料∶水=5∶1∶45∶2.5(体积比)。利用水泥水化初期的可塑特性,通过孔结剂调整水泥基胶结体的孔隙特性,使高性能水泥基吸声材料形成多孔且在一定集域中连通的类絮状结构,从而使其具有良好的吸声性能。检测结果表明,该吸声材料的吸声系数大于0.8,达到了一等吸声制品的要求,同时其力学、耐候和耐久性能良好。
Based on the spectrum characteristics of railway noise, cementitious materials with high performance of absorbing noise have been researched which including craft of manufacture, performance of absorbing noise and mechanical performances. Cementitious materials with high performance of absorbing noise manufactured with two dimension stress, take cement as the main connection materials and swell pearl sand as skeleton. The basic proportion is coagulant ＂ aperture admixture ＂ skeleton ＂ water =5 ： 1 ： 45 ： 2. 5 （volume rate）. The high performance of absorbing noise has benefit of opening aperture construction which comes into being through coefficient of aperture admixture and cement. As a result of test, the coefficient of absorbing noise is over 0.8, which meets the requirements of the best grade of the same product. At the same time, it processes better mechanical performance, higher durability and better climate-resistant performance.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2006年第3期43-46,共4页
China Railway Science
关键词
水泥基吸声材料
工艺
吸声性能
吸声系数
Cementitious materials of absorbing noise
Craft of manufacture
Performance of absorbingnoise
Coefficient of absorbing noise
作者简介
仲新华（1971-），男，江苏吴江人，助理研究员.
