The inspector plays a vital role on every construction project ensuring that the completed operations comply with the plans and specifications. Recognizing that many agencies were inexperienced in performing full depth reclamation, and hesitant to add the treatment to their pavement management systems because of their lack of familiarity, the Asphalt Recycling & Reclaiming Association worked with FHWA to develop the Basic Asphalt Recycling Manual (BARM) and a series of best practice guidelines.
Copies of the BARM can be obtained at www.arra.org. Information on where to obtain the best practice guidelines and additional FDR resources can be found in the Additional Resources section of the Pre-Construction/ Specification Review page. As with any construction process, if the owner agency is concerned with any part of the process, the owner agency should have a conversation with the contractor.
With FDR, like most paving projects, the primary goal is to produce a strong, durable base course from existing pavement materials that is ready to receive a wearing surface. Inspectors can help achieve this goal by ensuring that the process is in accordance with the contract documents as follows:
Mix Design: Verify representative samples were obtained throughout the project and that a mix design(s) was performed by a qualified lab resulting in a mixture that meets or exceeds the contract documents.
Surface Preparation: Walk or drive the entire pavement section to be reclaimed for the day to ensure the surface has been properly prepared and that all pre-construction repairs have been performed. Ensure premilling, if required for grade control, was performed satisfactorily.
Acceptable Weather: Measure the air and pavement temperature and check conditions for anticipated heavy rainfall and freezing weather to determine if construction can start/continue.
Traffic Control: Verify that the proper traffic control is in place to keep the traveling public safe during FDR construction.
Remove chunks of oversized materials prior to compaction.
Application Rates: Periodic checks should be made to verify that the amount of material being added to the reclaimed mixture is within allowable tolerances.