摘要
对连续型密级配普通沥青混合料和橡胶颗粒沥青混合料降噪特性进行了研究,并分析了不同橡胶颗粒掺量,以及不同橡胶颗粒粒径下混合料减振降噪性能的变化趋势。结果表明:将废旧橡胶颗粒应用于连续密级配路面具有可行性。当混合料中橡胶颗粒掺量增加、粒径减小时,混合料的构造深度和动态模量增大,回弹率、回弹值、竖向振动加速度及相位角减小,表明橡胶颗粒沥青混合料的降噪性能提高。此外,不同加载频率的动态试验还表明车速越高,路面/轮胎间的能量衰减越慢,振动噪声越大。
Noise reduction characteristic of successive type dense grade bituminous mixture from rubber particle was studied, as well as vibration and noise reduction performance trends of mixture was analyzed under the different rubber particles＇ content and particle size in this paper. The results showed that it＇s feasible to rubber particle to be applied to successive type dense grade rubber particle bituminous pavement. The structural depth and the dynamic modulus were increased along with increasing the content or decreasing the particle size of rubber particles in the bituminous mixture, furthermore, the springback ratio, springbaek value, acceleration of vertical motion and phase angle of the bituminous mixture were all decreased. It was shown from the aforesaid results that the noise-reduction capability of the rubber particle bituminous mixture was increased. Moreover, the dynamic state tests at different loading frequencies indicated that the faster was the vehicle speed, the slower was the energy fading between pavement and tyre, and leaded to the bigger vibrational noise.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第5期113-116,共4页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
内蒙古自治区高等学校科学研究项目(NJC07053)
关键词
沥青混合料
密级配
废旧橡胶颗粒
降噪
bituminous mixture
dense gradation
scrap rubber particle
noise reduction
