Proposed AASHTO Guides for Bridge Preservation Actions (2020) / Chapter Skim
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Pages 19-27
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19 The research team collected data from state DOTs on the use, performance, and costs of preservation actions. Datasets were collected from the state DOTs of California, Connecticut, Illinois, Michigan, New York, Ohio, Oregon, Pennsylvania, Wisconsin, Virginia, and Washington.
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20 Proposed AASHTO Guides for Bridge Preservation Actions standard specification. Ohio DOT bid items are for completed work -- all necessary materials, equipment, and labor.
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Context, Performance, and Cost of Bridge Preservation Actions 21 Use of State Data on Bridge Actions Context of Bridge Actions Bridge owners apply actions when bridges reach a certain condition, age, or both. Bridge condition and bridge age together are the context for an action.
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22 Proposed AASHTO Guides for Bridge Preservation Actions Time Intervals in Performance Intervals in time are collected for GCRs in time compared with GCR immediately after treatment. Intervals correspond to change (decrease)
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Context, Performance, and Cost of Bridge Preservation Actions 23 Eq. 7 Action Interval GCR GCR Det Rate Action Interval GCR Det Rate post pre effect ( )
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24 Proposed AASHTO Guides for Bridge Preservation Actions Connecticut DOT Connecticut DOT provided copies of Bridge Rental Repair Unit (BRRU) contracts that are used in maintenance of bridges.
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Context, Performance, and Cost of Bridge Preservation Actions 25 Virginia DOT Virginia DOT provided a list of average costs for preservation actions together with the details of Virginia's method for computing average costs. Washington DOT Washington DOT provided a database of bridge decks and treatments.
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26 Proposed AASHTO Guides for Bridge Preservation Actions interval is uncensored when its start and its end are both observed (i.e., when a history of deck GCRs includes both the condition rating at the date of treatment that starts an interval and the transition to a lower condition rating that marks the end of an interval)
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Context, Performance, and Cost of Bridge Preservation Actions 27 Treatment () , years Service Life, years0 –1 –2 Overlay, Polymer concrete, all 5.1 1.6 10.0 17.4 21.5 20.7 Overlay, Polymer concrete, epoxy 6.7 0.2 9.3 15.1 16.5 23.8 Overlay, Polymer concrete, polyester 4.9 1.7 10.0 17.5 - Table 19.
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