Latex and microsilica modified concrete bridge deck overlays in Oregon : interim report.
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1994-08-01
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Abstract:This interim report presented information collected from 24 bridge deck overlays constructed in Oregon between 1989 and 1993. Decks were placed on a variety of existing structures using hydroblasting, milling and diamond grinding surface preparation. All decks were latex or microsilica modified concrete.
Some decks experienced premature cracking and/or delamination. The objective of this study is to determine the possible cause(s) of these distresses and recommended procedures to correct the problem
Statistical analyses of available environmental and construction information failed to clearly establish the causes of early cracking or delamination. Petrographic studies did show more microcracking was present in the substrate when milling used compared to hydrodemolition.
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