The use of reclaimed asphalt pavement (RAP) from Department projects or other approved sources in hot mix asphalt (HMA) or warm mix asphalt (WMA) shall be subject to stockpile management and handling of material as described in this section. The Department approves RAP on a stockpile basis, following the process set forth in this method. The contractor’s responsibilities in the process are as follows: • To obtain the Department’s approval of all RAP prior to its use on a Department project and to deliver test data and samples as required • To monitor and preserve the quality and uniformity of the approved material during storage and handling, adding no unapproved material to the existing stockpile • To comply with the Department’s requirements regarding replenishment of approved stockpiles The Department will approve RAP based on its composition and variability in gradation and asphalt content, and on visual inspections of the stockpile, which the Department may conduct at its discretion. The Department may withdraw approval of a stockpile if the requirements of this specification are not followed in good faith. The Maximum Percentage Allowed in a mix design will be based on these criteria and on the category of RAP source, as defined in this document . II. APPROVAL PROCESS Qualified asphalt producers (listed in List of Approved Materials -Asphalt Mixing Plants ) may submit requests for RAP stockpile approval to the Asphalt Branch, Division of Materials, in the Annual Certification for Previously Approved Asphalt Mixing Plants and Related Equipment. The requester shall provide test results as prescribed in Part II D. The Division of Materials may, at their discretion, collect samples or inspect a RAP stockpile consistent with Section IIE. Upon completion of the review of testing results and, if applicable, visual inspection, the Division of Materials, Asphalt Branch will approve or disapprove the material by letter and will assign a Stockpile Identification Number for each approved RAP stockpile. Note: The contractor's average gradation and asphalt content, as listed in the approval letter, shall be the gradation used in subsequent mix designs. The approval letter will state the applicable limits on the use of the material in mix designs and will summarize the Department's findings, listing the average gradation and asphalt content from the contractor's tests and the corresponding values found by the Department. Where the Maximum Percentage Allowed is low due to variability, the contractor may elect to improve the uniformity of the material by further processing and may again sample, test, and request approval for the material. No material shall be added to a stockpile after it has been approved, except as provided in Parts V, VI, and VII below.
