Performance Analysis of Clear Binder Asphalt Mixture Application
Abstract
A greater technological and political awareness of safe driving practices and the reduction of an automobile's overall effect on the environment has led to increased use of colored asphalt pavements in new road construction. This study examines the impact of varying binder grades on stiffness, fatigue, and permanent deformation in different asphalt concrete paving mixtures. Following the completion of mechanical characterization, acceptance inspection, and photometric property analysis, a clear asphalt mixture suitable for wear courses was produced. Titanium dioxide (white), Iron oxide (yellow), and iron oxide (red) pigments were used to decolorize the conventional asphalt, with the pigment dosage maintained at 4% by weight of the total mix for all pigments. The result of temperature variation of pigment samples was verified by performance tests. Cooper wheel tracking and dynamic modules are both tests performed at higher temperatures to assess the performance of conventional, clear, and pigmented asphalt. Results indicate that clear binder asphalt has decreased rutting compared to conventional asphalt, along with the addition of pigments, clear asphalt mixture also decreases rutting depth, and yellow-pigmented asphalt shows minimum rut depth. Also, pigmented asphalt pavement shows higher resistance against permanent deformation for both at 40 ºC and 50 ºC. When compared to conventional asphalt, it was found that had significantly higher levels of brightness and reflection.
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