RAS should not be blended with any other aggregate or RAP prior to use.

• A. True
• B. False
• C. Only with aggregates
• D. Only with other RAP

Answer: (B)

RAS brings asphalt binder and mineral material to the mix, so it isn’t automatically restricted from being combined with other aggregates or RAP before the final mix is made. In many designs, RAS is blended with RAP and virgin aggregates to control the overall asphalt content and gradation, and this blending can occur prior to the actual asphalt production as long as the mix design and specs are met. The crucial point is to account for the asphalt contributed by RAS and to ensure moisture, contaminants, and grading are within limits. So the statement that RAS should not be blended with any other aggregate or RAP prior to use isn’t universally true.