Analysis of Temperature-Dropping Characteristics of Warm Mix Asphalt and Hot Mix Asphalt

摘要

In order to research the temperature-dropping characteristics of warm mix and hot mix asphalt, some rutting test panels are used as specimens to determine the temperature-dropping characteristics of hot mix asphalt(HMA), warm mix asphalt(WMA) with mixing additive "LuBo" and warm mix asphalt with mixing additive "Sasobit" under the conditions with initial temperatures of 110°C and 130°C. The test results indicate that: the higher initial temperature, the higher temperature-dropping rate is. After 25min the temperatures of rutting test panels with initial temperatures of 110°C and 130°C are close to 66°C and 68°C. The temperature-dropping rates of different types of mixtures are not the same. When the initial temperature is 110°C, the temperature-dropping rate of hot mix asphalt is the highest, the temperature-dropping rate of warm mix asphalt added with "Sasobit" is in the middle, and the temperature-dropping rate of warm mix asphalt added with "LuBo" is the lowest. After 35min, the temperatures of the three types of asphalt mixtures had fallen by 53°C, 51°C and 49°C separately.