Proposed AASHTO Guides for Bridge Preservation Actions (2020) / Chapter Skim
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2 In this chapter, bridge preservation and bridge components are defined, actions in bridge preservation are listed, bases for preservation actions are identified, and a method for evaluation of the benefits of bridge preservation is outlined. Definition of Bridge Preservation Bridge preservation applies actions in maintenance and repair to existing bridges that are adequate for continued service.
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Bridge Preservation 3 • Preservation Actions (Bridge Guide 2.4.1)
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4 Proposed AASHTO Guides for Bridge Preservation Actions Treatments in the Deck Guide are named by activity and material. All treatments affect the same component, that is, the deck.
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Bridge Preservation 5 Component Cyclic Condition-Driven Approach Overlay, Asphalt Overlay, Polymer Seal Rehabilitate, Reinforced Concrete Repair, Asphalt Wearing Surface Repair, Embankment Repair, Settlement, Mudjack Repair, Reinforced Concrete Repair, Slope Paving Repair, Voids under Slab Replace, Reinforced Concrete Slab Replace, Slope Paving Retrofit, Relief Joint in Approach Bearing Clean Clean, Lubricate Paint Rehabilitate Repair Repair, Reset Replace Retrofit, Change to Elastomeric Bridge Clean Clean, Graffiti Paint, Full Paint, Spot Paint, Zone Rehabilitate Repair, Patch Concrete Channel Clean Repair, Channel Protection Repair, Scour Hole Retrofit, Channel Protection Retrofit, Modify Channel Retrofit, Stream Deflector Culvert Clean, Vegetation, Silt Rehabilitate, Reinforced Concrete Repair, Concrete Barrel Repair, Concrete Headwall Repair, Concrete Spalls Repair, Concrete Wingwall Repair Joints in Walls, Floor Repair, Voids Beyond Walls, Floor Replace, Apron Replace, Concrete Headwall Replace, Concrete Wingwall Retrofit, Streambed Paving Deck Clean Overlay, General Overlay, Asphalt + Membrane Overlay, Concrete or Modified Concrete Overlay, Polymer Concrete Seal Repair, Asphalt Wearing Surface Rehabilitate, Reinforced Concrete Repair, Concrete Crack Repair, Concrete Crack, Healer/Sealer Repair, Concrete, Full Depth Repair, Concrete, Partial Depth Repair, Timber Replace, Grid Plate Replace, Precast Panel Drain Clean Repair Replace Retrofit, Drains Through Parapet Retrofit, Extend Scuppers Retrofit, Install Drain Joint Clean Replace, Seal/Filler Rehabilitate Repair, All Types Replace Retrofit, Change Type of Joint Retrofit, Eliminate Expansion Joint (continued on next page) Table 4.
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6 Proposed AASHTO Guides for Bridge Preservation Actions Railing Clean Paint Seal Repair, Concrete Repair, Metal Replace Retrofit, Eliminate Deflection Joint Substructure Clean Seal Rehabilitate Rehabilitate, Pier Cap Repair, Cathodic Protection Repair, Concrete Repair, Epoxy-Inject Reinforced Concrete Cracks Repair, Masonry, Repoint Repair Pile, Reinforced Concrete Jacket Repair, Steel Pile Repair, Timber Repair, Underpin in Stream Repair, Wingwall Replace, Panel, MSE Wall Replace, Reinforced Concrete Substructure Replace, Timber Retrofit, Timber Retrofit, Weepholes in MSE Wall Retrofit, Widen Reinforced Concrete Cap/Bearing Seat Component Cyclic Condition-Driven Superstructure Clean Seal Paint Paint, Spot or Zone Rehabilitate Repair Repair, Concrete Repair, Concrete Beam End Repair, Concrete Crack Seal, Inject Repair, Prestressed Concrete Beam Repair, Steel Repair, Steel Beam End Repair, Steel, Crack, Repair/Arrest Repair, Timber Replace, Reinforced Concrete Replace, Steel Replace, Timber Retrofit, Steel Truss Retrofit, Strengthen, Concrete Retrofit, Strengthen, Steel Table 4. (Continued)
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Bridge Preservation 7 Activity Detail Abbreviation Inspection Inspection and evaluation in support of selection of treatment for bridge deck I&E Pr ot ec tio n Surface sealer Silane, Siloxane SeSi Methyl methacrylate SeMm Epoxy SeEp Thin polymer overlay Epoxy OvThEp Polyester OvThPe Methyl methacrylate OvThMm Polymer overlay Polyester concrete OvPpc Hot mix asphalt (HMA) plus membrane Preformed membrane OvHma+MLiquid membrane Portland cement overlay Portland cement concrete (PCC)
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8 Proposed AASHTO Guides for Bridge Preservation Actions Eq. 1 PV Benefit PV Cost PV Cost Annual Benefit Annual Cost Annual Cost No Preservation Preservation No Preservation Preservation = − = − where: PV Benefit is the difference in present-value costs.
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Bridge Preservation 9 Present-Value Costs Present-value costs for preservation actions and future replacement of bridges or bridge components are computed. Present-value costs are obtained for bridge service with preservation and bridge service without preservation.
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