What is the minimum thickness for asphalt being placed over an ARMI layer?

The minimum thickness for asphalt being placed over an ARMI (Asphalt Rubber Modified Asphalt) layer is 1 1/2 inches. This requirement is essential because it ensures that the asphalt has sufficient mass and structural integrity to properly bond with the ARMI layer, providing a durable surface that can withstand traffic loads and environmental conditions. A thicker layer helps in preventing issues such as cracking and premature failures of the paving surface. When the asphalt layer is too thin, it may not perform adequately under stress and can lead to reduced lifespan and maintenance concerns. Maintaining this minimum thickness is crucial for achieving a successful and long-lasting pavement structure when using ARMI technology.