Evaluation of asphalt--aggregate bond and stripping potential



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Texas Tech University


One of the primary deterioration mechanisms of asphalt concrete is the de-bonding of asphalt from aggregate in the presence of moisture. This distress mechanism is also referred to as stripping. It is a very complex process of moisture damage that is caused by several factors, including the characteristics of asphalt cement and aggregate as well as environmental conditions. This research evaluated the interfacial bonding mechanisms and stripping potential of aggregate-asphalt binder combinations commonly used by Texas DOT in maintenance seal coats. This evaluation was conducted using two test procedures; Net Adsorption Test and TechMRT Pull-Out Test. Results from this evaluation will help improve the performance of seal coats and HMA pavements in Texas.