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  • Evaluation of NiTech FG-NDGB Pelletized Asphalt for Rapid Airfield Damage Recovery Applications

    Purpose: The NiTech Corporation’s FG-NDGB Pelletized Asphalt (PA), herein referred to as NiTech PA, was identified as a surfacing material for Rapid Airfield Damage Recovery (RADR) applications by the US Air Force Civil Engineer Center (AFCEC). AFCEC tasked the US Army Engineer Research and Development Center (ERDC) with evaluating NiTech PA by conducting full-scale crater repairs and applying simulated F-15E aircraft loads. The properties of the repair material were also to be obtained via laboratory characterization testing.

  • Unified Facilities Criteria and Unified Facilities Guide Specifications for Sustainable Military Construction : Concrete, Asphalt, Wood, and Life-Cycle Assessment Perspectives

    Abstract: Construction materials such as concrete, asphalt, and wood are essential components for Department of Defense (DoD) Military Construction (MILCON) and construction for contingency operations around the world. From housing facilities, to airfields, to magazines and hardened structures, each of these materials fulfill numerous Army building applications. However, greenhouse gas (GHG) emissions stemming from the manufacturing, application, maintenance, and disposal of concrete and steel exact a significant climate burden. Thus, due to their pervasive use and commodity status, the advancement of sustainable concrete, asphalt, and wood materials are a critical driver for GHG mitigation. This report communicates a first step toward decarbonization-focused updates to UFC and UFGS by outlining major specifications related to concrete, asphalt, and wood with near- and long-term strategies to facilitate modernization. The Engineer Research and Development Center (ERDC) is poised to make a significant impact on the identification and integration of sustainable materials to meet regulatory goals for the re-duction of GHG emissions in MILCON. New guidance will be integrated into UFC and UFGS by leveraging unique re-search, development, test, and evaluation (RDT&E) capabilities in materials science, life-cycle assessment, and federal relationships with discipline working groups

  • Laboratory Evaluation of Recycled Asphalt Pavement and Engineered Polymer Binder for Small Airfield Repairs

    Abstract: Conducting small asphalt repairs on airfields in remote locations can be technically and logistically challenging. An alternative to cold patch products is using an engineered polymer binder (EPB) mixed with recycled asphalt pavement (RAP). This paper presents the results of a laboratory evaluation of EPB with both wet and dry RAP. Compacted specimens were tested for rut resistance, indirect tensile strength (ITS), and Cantabro mass loss (ML). The results indicate that RAP mixed with EPB exhibited substantial rut resistance with ITS and ML similar to that of conventional dense-graded asphalt. Overall, the EPB and RAP blend appears to be a promising alternative for airfield repairs.

  • Evaluation of a Prototype Integrated Pavement Screed for Screeding Asphalt or Concrete Crater Repairs

    Abstract: Finishing, or screeding, the hot mix asphalt or rapid-setting concrete surface of a crater repair is important for rapid airfield damage recovery (RADR) since it determines the aircraft ride surface quality. The objective of RADR repairs is to expediently produce a flush repair, defined as ±0.75 in. of the surrounding pavement surface, with minimal logistical and personnel burden. Multiple screeds were previously evaluated; the most recent project proposed a prototype design of a telehandler-operated integrated screed for both small and large repairs using asphalt or concrete. This project’s objective was to finalize the prototype design and fabricate and test the prototype RADR screed. The prototype RADR screed was successful for small repairs (8.5×8.5 ft). Large repairs (30×30 ft) were generally successful with modest repair quality criteria (RQC) issues being the only notable deficiencies. Large concrete repair RQC issues were attributed to plastic formwork movement, and large asphalt repair RQC issues were attributed to compaction issues or improper roll-down factors. Methods to mitigate these factors were investigated but should be further evaluated. Overall, the RADR screed was successful from technical perspectives but, functionally, is 600-800 lb overweight. Weight reduction should be considered before entering production.

  • ERDC’s ‘simple but unique’ pothole solution honored with Federal Lab Consortium award

    From NASCAR racetracks to aircraft runways on military bases across the world, wherever they develop, potholes can cause serious problems. A team at the U.S. Army Engineer Research and Development Center (ERDC) was recently honored with an award from the Federal Laboratory Consortium for their collaborative effort to address the worldwide problem of potholes with a unique innovation, Induction Hot-Mix Asphalt (iHMA).

  • 21-040 Little Goose closing esplanade for seal coating this Friday, July 23

    STARBUCK, Wash. – Little Goose Lock and Dam will be temporarily closing public access to the esplanade picnic and fishing areas on Friday, July 23 to accommodate asphalt maintenance work in the adjacent parking lot.

  • 21-017 Parking lot at Mill Creek to be closed April 6 for paving

    Walla Walla, WA -- The U.S. Army Corps of Engineers’ Walla Walla District (Corps) will be paving the parking lot adjacent to the Mill Creek Office building on April 6. This work will result in the closure of the parking lot and road to the Mill Creek Office for that day.

  • 20-047 Corps to close parts of Lewiston Levee Trail for maintenance

    Parts of the Lewiston Levee Trail near Clearwater landing will be closed on Sept. 10 to accommodate asphalt maintenance work, U.S. Army Corps of Engineers officials announced today.

  • PUBLICATION NOTICE: Feasibility Investigation of Inductive Heating of Asphalt Repair Materials

    Abstract: Airfield pavement repairs conducted as part of rapid airfield damage recovery (RADR) activities must utilize suitable materials to reduce the need for subsequent repairs in order to maintain an operable pavement surface. For asphalt concrete pavements, hot mix asphalt (HMA) is typically used, but this requires a fairly large operation and is less practical for small repairs (e.g., small munitions damage, potholes). Instead, cold mix asphalt (CMA) is typically used for small repairs; however, its performance under aircraft loads is generally unacceptable.  The objective of this project was to investigate the feasibility of rapidly heating small-repair quantities (e.g., 5 gal buckets) of asphalt mix to hot mix temperatures in a matter of minutes. This objective was met using 15% steel aggregate by volume to produce an inductive HMA (iHMA) that could be heated from ambient to 320°F in approximately 5 min. This technology was demonstrated at full scale with a prototype field induction heater; iHMA patch repairs were subjected to simulated F-15E traffic and exhibited comparable rutting resistance to conventional HMA, which was considerably improved relative to CMA. Overall, iHMA was found to be a feasible repair material and should be considered for additional refinement and eventual implementation.

  • 19-101 Lewiston Levee Trail to be closed for seal coating from Clearwater Landing Interpretive Center to Lewis & Clark Interpretive Center Oct. 2-3

    Clarkston, WA – A stretch of the Lewiston Levee Parkway Trail, extending from Clearwater Landing Interpretive Center to the Lewis & Clark Interpretive Center, will be closed to public access Oct. 2 to 3 to accommodate asphalt seal coating of the trail, according to U.S. Army Corps of Engineers officials at the Clarkston Natural Resources Office.