![]() ![]() ¢ Compositeânew thin or thick asphalt surface layer overĪ new concrete layer. ¢ CRCPâconcrete pavement with longitudinal reinforce. Ment to hold shrinkage cracks tightly closed. Layer placed over stabilized subgrade or placed directly ¢ Full-depth asphaltârelatively thick asphalt surface May consist of unbound aggregate and/or stabilized layers. ¢ Semi-rigidâthin or thick asphalt surface layer placed May consist of unbound aggregate and/or stabilized ¢ JPCPâconcrete pavement with short joint spacing,Īnd with or without dowel bars (10 to 20 ft). Base layers mayĬonsist of unbound aggregate and/or stabilized layers. ¢ Thick asphaltâasphalt surface layer greater than 6 in. ¢ Thin asphaltâhot or warm mix asphalt (that will beĭesignated as asphalt in this synthesis, but is intended to Thick over unbound aggregate base layers. Imply either layer type) surface layer less than 6 in. ¢ CIR without asphalt overlayâmilling (typically 3 toĤ in.) and mixing the existing asphalt surface with Milling (typically 3 to 4 in.) and mixing the existingĪsphalt surface with recycling agent, additives, and virginĪggregate, relaying, and compacting in-place followed by ¢ Cold in-place recycle (CIR) with asphalt overlayâ ¢ Bonded JPCP overlayâplacing a JPCP overlay directly Over (i.e., no interlayer) an existing concrete pavement ¢ Bonded CRCP overlayâplacing a CRCP overlay directly Synthesis include (not all of the following treatment typesĪre included in or have nationally calibrated performance In addition, the pavement type definitions for preservationĪnd rehabilitation treatments used in the survey and in this Placed over unbound aggregate base layers. SURVEY OF AGENCY PAVEMENT DESIGN PRACTICESĪsphalt overlay and/or a chip seal(s) or other surface Ing, and compacting in-place followed by either a thin Recycling agent, additives, and virgin aggregate, relay. ¢ Crack or break and seat with asphalt overlayâcrack ¢ Crack or break and seat with an unbonded overlayâĬrack or break and seat of an existing concrete pavementĪnd overlay with an unbonded CRCP or JPCP overlay. Joints and cracks of an existing JPCP concrete pavement ¢ Dowel bar retrofitâplacing dowel bars at the transverse Or break and seat of an existing concrete pavement and #Winpas pavement design software crack ¢ Diamond grindingâremoving a thin layer (0.12 toĠ.25 in.) of the existing concrete surface using equip. Removal of the full depth of the existing asphalt layerĪnd predetermined portion of the underlying base by ¢ Full-depth reclamation (FDR) with asphalt overlayâ Ment fitted with closely spaced diamond saw blades. ![]()
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