Abstract
AbstractConventional asphalt binder material strongly absorbs solar energy due to its black color. The consequent high surface temperature of asphalt pavement during the summer accelerates rutting, impairs long-term durability, and causes undesirable environmental impacts (i.e., heat island effects and volatile gas emissions). The black surface of asphalt also leads to high thermal emissivity and a fast rate of temperature drop under severe cold weather conditions. Thermochromic materials are substances that can reversibly change their colors in response to temperature variations. This study presents innovative, multifunctional thermochromic asphalt binder that is designed to modulate the surface temperature of asphalt pavement, i.e., to reduce the surface temperature of pavement during hot summers and to increase the surface temperature during cold winters. Optical measurements are conducted on the thermochromic asphalt binder, which is found to be more reflective than conventional asphalt binders, and t...
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