| Popis: |
The United States Army Engineer Research and Development Center was tasked by the US Air Force Civil Engineer Center to improve the saw cutting and excavation production rates of crater repairs in thick portland cement concrete (PCC) pavements for airfield damage repair (ADR) scenarios. The concrete cutting and excavation rates, along with the required manpower, using Caterpillar SW45 and Sw60 wheel saws and Caterpillar and Volvo excavators, respectively, in 18-in.-thick PCC pavement did not meet the required production rates during the 2009 Operational Utility Assessment (OUA) in Avon Park, Florida. The current ADR techniques, tactics, and procedures (TTPs) indicate cutting of pavement around a crater should be completed in 22 min or less, and excavation (breaking and removal) of the repair area should be completed in 23 min or less for an 8.5- by 8.5-ft crater. Various equipment (e.g., wheel saws, excavators, rock splitter, anchors, etc.) and methods were evaluated for sawing and removing concrete and base course material in 18- and 24-in.-thick PCC and 5-in.-thick hot-mix asphalt. This report presents the technical evaluation of various sawing and excavation equipment and methods for improving the efficiency of removing damaged pavement associated with crater repair. |
