排水性舗装の路面テクスチャとタイヤ/路面騒音に関する検討

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  • A STUDY OF THE RELATIONSHIP BETWEEN SURFACE TEXTURE AND TIRE/ROAD NOISE OF POROUS ASPHALT PAVEMENT

説明

Porous asphalt pavement has been widely applied in every road by recognizing its noise reduction properties. We have studied the relationship between characteristics of pavement surface texture and generation of tyre/road noise on porous asphalt pavement. Existing data analyzed in the last paper are somewhat dubious about different factors of used materials and execution of paving method because of existing porous asphalt pavement opened for traffics. This study was conducted in almost the same conditions of pavement materials, production method of porous asphalt mixtures and paving execution in experimented field. Test results obtained from this study show that an appropriate indicater of surface texture is found to make the generation of tyre/road noise clear. Another analyze is also done on the relationship between power spectrum density of pavement surface profile and power level in 1/3 octave band of tyre/road noise. These evaluation indicators of pavement surface texture are effective for consideration of tyre/road noise generation.

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