Pavement rehabilitation using cold in-place asphalt pavement recycling

An apparatus, comprising:

• a milling machine including:
• a milling head for milling at least a portion of an existing asphalt surface course layer to generate asphalt particles, the milling head substantially preserving each of an underlying binder course layer, an underlying base course layer and an underlying subbase course layer during the milling of the existing asphalt surface course layer;
• and
• a conveyor belt having a first end positioned substantially adjacent the milling head, the conveyor belt for transporting the generated asphalt particles;
• and
• a mixing and paving machine coupled to the milling machine via a draw bar, the mixing and paving machine including:
• a screen positioned substantially adjacent to a dispensing end of the conveyor belt to receive the generated asphalt particles from the conveyor belt, the screen for filtering the generated asphalt particles from the milling head to provide filtered asphalt particles;
• a mixing apparatus positioned below the screen, the mixing apparatus for:
• receiving the filtered asphalt particles;
• adding a predetermined proportion of an additive to the filtered asphalt particles;
• and
• mixing the filtered asphalt particles and the additive to generate a recycled mix;
• and
• a paving apparatus connected to the mixing apparatus for depositing the recycled mix onto at least one of the substantially preserved binder course layer or an unmilled portion of the existing asphalt surface course layer.

A method of remediating an existing asphalt surface course layer using cold in-place recycling of original asphalt of the existing asphalt surface course layer, the method comprising:

• milling at least a portion of the existing asphalt surface course layer to generate asphalt particles, the milling substantially preserving at least one of an underlying binder course layer, an underlying base course layer or an underlying subbase course layer;
• collecting the generated asphalt particles;
• filtering the generated asphalt particles to provide filtered asphalt particles;
• adding a predetermined proportion of an additive to the filtered asphalt particles;
• mixing the filtered asphalt particles and the additive to generate a recycled mix;
• depositing the recycled mix onto at least one of an unmilled portion of the existing asphalt surface course layer, the substantially preserved underlying binder course layer, the substantially preserved underlying base course layer or the substantially preserved underlying subbase course layer;
• and
• finishing the deposited recycled mix to create a new recycled surface layer.