Specifications include, but are not limited to: General: Materials to be used for geogrid reinforced base construction shall consist of virgin crushed stone, recycled Portland cement concrete, or a blend of recycled Portland cement concrete and Reclaimed Asphalt Pavement (RAP). This blend is not to exceed 50% RAP and shall be tested by use of an asphalt burn off oven to ensure compliance. All materials shall meet the following gradation specification. Stone/Concrete / Blended Aggregate: 1) Gradation % Retained Sieve Size (by dry weight) 2-1/2" 0 3/4" 20-60 #4 50-80 #40 80-94 #200 90-98 2) Durability Virgin base material quality shall conform to the requirements specified by the KDOT Subsection 1102 for Durability Class 1. 3) Absorption All virgin base material shall have a maximum absorption of four percent (4%).