Bridge Deck Deterioration In Colorado PDF Download

Measures to reduce or eliminate bridge deck deterioration by the use of various protective systems have been the subject of a series of reports begun in 1976. This report presents current observations of latex modified deck topping concrete protective systems. Latex modified concrete topping has not provided long-term protection for the ten structures under evaluation in Colorado, Cost comparison are made between repair with latex modified concrete and deck replacement. Over a 40-year period, replacement costs are slightly less than rehabilitation costs. Greater control of the curing of deck topping material may reduce shrinkage cracking. Nightime paving, cooler calmer weather and higher humidity would increase the probability of success on latex modified concrete to rehabilitation projects. Asphalt membrane and asphalt overlay are also suggested to increase the probability of success. Implementation: Latex modified concrete is not recommended as a rehabilitation option in Colorado at this time. Further evaluation of two structures using latex modified concrete under nigh paving and tight control of curing methods is currently underway on I-25 North of Longmont.