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首页> 外文会议>Pavement performance: Current trends, advances, and challenges >Estimating Acoustic Performance Trends of Various Asphalt-Surface Mixtures Based on Field Measurement
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Estimating Acoustic Performance Trends of Various Asphalt-Surface Mixtures Based on Field Measurement

机译：基于现场测量的各种沥青路面混合料的声学性能趋势估计

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摘要

As one measure to reduce traffic noise, designing a noise-reducing ("quiet") pavement surface has received increasing attention. For asphalt pavements, some existing asphalt mixtures have shown better noise-reducing capabilities than conventional dense-graded asphalt concrete (DGAC) pavements. To design a new asphalt mixture optimized for noise reduction, the acoustic performance of existing asphalt-surface mixtures needs to be evaluated and understood. For this purpose, a study was conducted to measure tire/pavement noise on a variety of asphalt pavements for four consecutive years. The tire/pavement noise was measured with an on-board sound-intensity (OBSI) method that was continuously improved during the study. Regression analysis was applied to determine the levels and increase rates of tire/pavement noise on four major asphalt mixtures, and the effects of mix design variables on tire/pavement noise. Results show that tire/pavement noise generally increases with pavement age on all types of asphalt pavements. For newly placed or overlaid pavements, open-graded or rubberized gap-graded mixtures exhibit lower noise levels than conventional dense-graded asphalt mixture. Open-graded asphalt mixtures can retain noise-reduction benefit for a longer period than gap-graded mixtures. Using rubberized binders in the open-graded mixtures can further reduce the noise-increase rate. Pavement surface permeability, macrotexture, and existing surface distresses may affect the tire/pavement noise level.
机译：作为减少交通噪声的一种措施，设计一种降低噪声（“安静”）的人行道表面已引起越来越多的关注。对于沥青路面，某些现有的沥青混合物已显示出比常规的高密度沥青混凝土（DGAC）路面更好的降噪能力。为了设计一种优化的降低噪音的新型沥青混合料，需要评估和理解现有沥青表面混合料的声学性能。为此，进行了一项研究，以连续四年测量各种沥青路面上的轮胎/路面噪声。轮胎/路面噪声是通过车载声强（OBSI）方法测量的，该方法在研究过程中不断得到改进。应用回归分析来确定四种主要沥青混合料的轮胎/路面噪声的水平和增长率，以及混合设计变量对轮胎/路面噪声的影响。结果表明，在所有类型的沥青路面上，轮胎/路面噪声通常随路面寿命的增加而增加。对于新铺设或覆盖的人行道，开放等级或橡胶化的间隙等级混合料比传统的密集等级沥青混合料具有更低的噪音水平。与等级梯度混合料相比，开放等级的沥青混合料可以保留更长的降噪效果。在开放级混合物中使用橡胶粘合剂可以进一步降低噪声增加率。路面的渗透性，宏观纹理和现有的表面应力可能会影响轮胎/路面的噪音水平。

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