Sealants, Treatments, and Deicing Salt Practices to Limit Bridge Deck Corrosion KYSPR 10-388

OBJECTIVES: KYSPR 10-388 Continuation of an Approved Study Anticipated Completion FY 20 II I. Determine cun'ent KYTC practice for applying deicing salts to bridge decks including monitoring deicing materials, methods of deicing application (i.e. weUdry), application frequency and application rates statewide. Identify candidate bridges to monitor amlUal deicing salt application, chloride penetration and resultant deck deterioration. 2. Identify sealants, densifiers and inhibitors used nationwide to protect reinforced concrete bridge decks from chloride induced corrosion. Identify deicing salt substitutes, inhibitors and extenders used to limit deicing salt induced cOHosion. 3. Conduct laboratory salt-ponding tests of various sealants, densifiers and inhibitors along with salt substitutes, salt inhibitors and extenders to determine which ones are effective for addressing/limiting corrosion of bridge deck reinforcing steel. Conduct laboratory tests of treatments to limit deicing salt use in the experimental projects. 4. Monitor experimental bridge deck treatments to evaluate application procedures for sealants, densifiers and inhibitors found to be effective in laboratory tests. Apply effective salt substitutes, salt inhibitors or extenders on selected bridges. Measure deicing salt impacts on cOlTosion. Monitor other experimental deck treatments/practices detennined to be effective in limiting long-term exposure/concrete penetration by deicing salts 5. Provide KYTC with reconunendations implementing bridge preservation actions including the application of sealers, densifiers and/or inhibitors to bridge decks. That will include guidelines for using those treatments on specific categories of bridges (determined in the study).