Research on Test Method of Damping for Asphalt Pavement Concrete

• 1、Intelligent Transportation System Research Center of Southeast University, Nanjing 210096, China

Abstract：Based on beam theories and asphalt concrete properties, test and evaluation method of damping parameter for bridge deck pavement was first proposed, and the determination of the specimen dimensions was studied. Then as example, epoxy asphalt concrete was tested at different temperatures under simply supported and cantilever supporting conditions respectively. Moreover, comparison between theoretical and test results were made to verify the reliability of this proposed method. Furthermore, effects on damping ratio of the aspects such as supporting conditions, loading modes and temperature variations were analyzed. The results showed that both measured and theoretical values of basic frequency of the beam specimen match well at room temperature, the damping of the asphalt concrete increases with temperature which is opposite to the modulus variation trend, and they don't have proportional relationship. This research can provide reliable damping parameter of asphalt materials for deck pavement dynamic analysis.

Keywords： Pavement , Damping, Asphalt Mixture, Vibration Attenuation, Modulus