...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Acoustics >Evaluation of sound absorption capacity of asphalt mixtures
【24h】

Evaluation of sound absorption capacity of asphalt mixtures

机译：沥青混合料的吸声能力评估

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Noise generation is an environmental problem that affects human beings, animals and even plants. Several serious diseases have their development associated to the exposure of human beings to high levels of noise pressure, such as arterial hypertension, gastrointestinal changes, alterations in blood glucose and high heart rate, among others. Vehicle traffic is part of a group of noise-generating factors. Various mechanisms govern the generation and propagation of vehicle noises, which are produced mainly by motor vibration at speeds below 50 km/h and by the tire-pavement contact at speeds above 50 km/h. The noise generated by tire-pavement contact is the result of two components: aerodynamic noise (mainly related to the coating porosity), and mechanical noise (related to the coating texture). The noise generation according to these two components may be mitigated by using special asphalt mixtures. This work evaluates the sound absorption of four different types of asphalt mixtures (common dense-graded asphalt mixture, dense-graded rubberized asphalt mixture, rubberized porous coat with void volumes varying from 22% to 27%, and rubberized open-graded friction course) and the effect of granulometry and void volume of each mixture on the sound absorption coefficient. Mixture slabs were molded in a slab compactor developed by LCPC (Laboratoire Central des Ponts et Chaussees) and specimens were extracted from each one for assessing the sound absorption capacity in the laboratory. The acoustic behavior was evaluated according to standard ISO 10534-2, using impedance tubes. Results showed that sound absorption is strongly influenced by void percentage, interconnected void percentage and layer thickness. (C) 2016 Elsevier Ltd. All rights reserved.
机译：噪声的产生是一个环境问题，影响到人类，动物甚至植物。与人类暴露于高水平的噪声压力相关的几种严重疾病的发展，例如动脉高血压，胃肠道变化，血糖改变和高心率等。车辆交通是一组噪声产生因素的一部分。各种机制控制着车辆噪声的产生和传播，这些噪声的产生和传播主要是由速度低于50 km / h的电动机振动和速度高于50 km / h的轮胎-路面接触产生的。轮胎-路面接触产生的噪声是两个因素的结果：空气动力学噪声（主要与涂层孔隙率有关）和机械噪声（与涂层质地有关）。通过使用特殊的沥青混合物，可以减轻根据这两个分量产生的噪音。这项工作评估了四种不同类型的沥青混合料（常见的致密梯度沥青混合料，致密梯度橡胶化沥青混合料，空隙体积从22％到27％不等的橡胶化多孔涂层和橡胶化开放级摩擦过程）的吸声性能。以及每种混合物的粒度和空隙体积对吸声系数的影响。混合板在由LCPC开发的板式压实机中模压，然后从每个实验室中提取样品以评估实验室的吸声能力。根据标准ISO 10534-2，使用阻抗管评估声学性能。结果表明，吸声受到空隙率，互连空隙率和层厚的强烈影响。 （C）2016 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号