OGFC路面降噪特性研究

为了研究开级配排水式磨耗层路面（OGFC）的降噪特性，通过声级仪对采用胶粉改性沥青的OGFC路面和普通改性沥青的密集配路面在不同车型、车速、车况下进行噪声现场测试。结果表明，OGFC路面比普通密集配路面降噪量最高可达8．9dB。同时用驻波管法对两种路面的试样在不同厚度条件下测定其吸声系数，发现采用厚度为4cm的OGFC路面可获得最大的降噪效果。得出采用胶粉改性沥青厚度为4cm的开级配排水式磨耗层作为低噪声路面具有比较好的降噪特性。

Study of noise-reducing performance of OGFC pavement

Based on the results from site test of noise on open - graded friction courses { OGFC ） pavement with crumb rubber modified asphalt pavement and dense - graded pavement through the sound level meter under the conditions of different types of vehicles, vehicle speed, and vehicle condition, it has been shown that the maximum noise reduction of OGFC pavement is up to 8.9 dB in contrast with dense - graded pavement. At the same time, the coefficient of absorption for both pavement samples were measured with the standing wave tube method for two different conditions of pavement thickness, and the OGFC pavement can reach the maximum reduction in noise in thickness of 40mm, and it has better noise reduction features as a good low - noise road surface.