Evaluation of Properties of Low-noise Asphalt Mixture

In Korea, low-noise pavements are emerging as a new alternative to soundproof walls, but research into the physical performance of low-noise pavements are insufficient. Low-noise pavements are structurally susceptible due to air voids over 20%. In particular, two-layered low-noise pavements, constructed by different aggregate size are more vulnerable. In this study, physical tests were conducted on three design alternatives with different maximum aggregate size, thickness and air-void. Laboratory testing protocol was according to the Korean Standards. Cantabro test, indirect tensile strength test, tensile strength ratio test, and wheel tracking test, which are used primarily for performance testing of pavements materials, were conducted. As a result, all design alternatives met the quality standards of the Korean government. In particular, it was observed that the two-layered low-noise pavements is superior in terms of aggregate-dissipative resistance, crack resistance, moisture and raveling resistance, and rutting resistance.