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Geotechnical Engineering Report-Revised lrerracon <br /> Kaiser Everett Medical Center Everett,Washington -- s--- y� <br /> December 18, 2019 Terracon Project No. 81195071 GeoReporf <br /> Minimum AC Pavement Section <br /> Compaction/Material <br /> Layer Thickness (inches) <br /> Specification <br /> Compacted Subgrade 12 95% of Modified Proctor Maximum Dry <br /> Density; -2 to +2/a Optimum Moisture Content <br /> Crushed Aggregate Base <br /> Light-duty 4 WSDOT: 9-03.9(3) Base Course <br /> Heavy-duty 6 <br /> WSDOT: 9-03.8(2) '/z-inch HMA <br /> Asphalt Thickness 3 WSDOT: 9-03.8(6)3/4-inch Aggregate <br /> PG64-22 asphalt binder <br /> 1. May vary based on observations following proof-rolling. <br /> 2. Asphalt surface course only <br /> We recommend that Portland cement concrete (PCC, rigid) pavement be used where rigid <br /> pavements are appropriate. These areas include but are not limited to entrance and exit sections, <br /> dumpster pads, loading docks, or any areas where extensive wheel maneuvering or repeated <br /> loading are expected. The rigid pavement pads should be large enough to support the wheels of <br /> the truck which will bearing the haul load. The minimum thickness of PCC pavement should be 6 <br /> inches and underlain by a minimum of 6 inches of crushed aggregate base course (use WSDOT <br /> 9.03.9(3)). Adequate reinforcement and number of longitudinal and transverse control joints <br /> should be placed in the rigid pavement in accordance with ACI requirements. Although not <br /> required for structural support, the base course layer is recommended to help reduce potential for <br /> slab curl, shrinkage cracking, subgrade"pumping"through joints, and provide a workable surface. <br /> These thicknesses assume the subgrade is properly prepared and compacted as noted above. <br /> Proper joint spacing will also be required to prevent excessive slab curling and shrinkage <br /> cracking. All joints should be sealed to prevent entry of foreign material and dowelled where <br /> necessary for load transfer. <br /> The minimum pavement sections outlined above were determined based on post-construction <br /> traffic loading conditions. These pavement sections do not account for heavy construction traffic <br /> during development.A partially constructed pavement structural section that is subjected to heavy <br /> construction traffic can result in pavement deterioration and premature distress or failure. Our <br /> Responsive ■ Resourceful ■ Reliable 19 <br />