A Study of Noise Reducing by Reform on Road Surface for Concrete Pavement

本研究旨在探讨混凝土路面的路面轮廓与轮胎/道路噪音之间的关系，特别是带有暴露骨料的混凝土路面，以减少噪音。采用改造路面的方法，通过最大暴露粗骨料尺寸来改变路面轮廓。本研究通过改变骨料粒径来评估道路轮廓，并研究对轮胎道路噪声的影响，其中包括泵气噪声和轮胎振动噪声。采用卷筒式测量装置对环氧树脂粘结路面试件进行了轮胎振动噪声测量。接下来，泵气噪声的测量使用了轮胎跌落式测量装置，对混凝土和沥青材料的道路试样进行了检测。本研究澄清了以下几点：1。利用频率分布可以评价道路轮廓随使用的骨料粒径的变化情况，但路面深度的变化频率分布较小。采用鼓式噪声测量装置，随着骨料粒径的增大，轮胎振动产生的轮胎/路面噪声增大，随着车速的增大，轮胎/路面噪声量增大。由于车速的存在，导致轮胎振动噪声增大的路面凸部区间存在。当集料粒度较大时，采用降压式噪声测量装置，由于路面间隙产生2kHz以上的噪声，通过降低泵气噪声来降低轮胎/路面噪声。降低抽气噪声是最佳的集料粒度。综上所述，对于骨料粒度，骨料粒度小可降低轮胎振动噪声，骨料粒度大可降低泵气噪声。因此，在实际运行时，通过考察轮胎振动噪声元件与抽气噪声元件占轮胎/路面噪声元件的比例，可以得到最佳的骨料粒度。少

The present study has been carried out to investigate the relationship between the surface profile of road and tire/road noise for concrete pavement, particularly concrete pavement with exposed aggregate, for reducing noise. A method for reforming road surface is adopted to change profile by maximum size of exposed coarse aggregate. This study was performed to evaluate the road profile by changing aggregate size and to examine the influence on the tire road noise where consists of the air pumping noise and the tire-vibrating noise. The measurement of the tire-vibrating noise was executed with a measurement device of the drum type to the examination road specimen bound aggregate with epoxy resin. Next, the measurement of the air pumping noise used a measurement device of the tire fall type, to examination road specimen of concrete and asphalt materials.This study clarified the following.1. The road profile changing by used aggregate size can be evaluated by using the frequency distribut … More ion of the road depth.2. The tire/road noise by the tire-vibration increases when aggregate size increases, and furthermore the amount of the tire/road noise increases when the speed increases, with the drum type noise measurement device. The convex part interval of the road where the tire-vibration noise is led to an increase for the speed exists.3. When it makes aggregate size large, the tire/road noise decreases by reducing the air pumping noise because the gap on the road surface causes, being generated by 2kHz or more, with the fall type noise measurement device. Moreover, best aggregate size exists being reduce the air pumping noise.From the above-mentioned, as for aggregate size, it is that aggregate size being small decreases the tire vibrating noise and aggregate size being large decrease the air pumping noise. Therefore, it is considered that optimum aggregate size is obtained by examining the ratio of the element on tire-vibrating noise and the element on air pumping noise as an element of the tire/road noise when really running. Less