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- W585547803 abstract "The objective of this work was to verify whether reinforced concrete bridge deck slabs repaired by means of hydrodemolition (HD) followed by application of latex modified concrete (LMC) overlay, behave in composite or non-composite fashion and if necessary, specifying the criteria for developing composite action. The motivation behind this study was the fact that some transportation authorities do not allow any structural capacity to be replaced by way of overlay application. Therefore, if a bridge deck is demolished to half depth and then repaired to original depth; it must be structurally rated as if it were only half depth.As part of the testing, full scale reinforced concrete slabs were subjected to three point bending until failure. Ten of the specimens were cast in the laboratory and four were cut from a decommissioned bridge deck. The depth of overlay varied from approximately half depth of the slab to approximately 1 inch (25.4 mm). Along with depth of applied overlay, one specimen was tested in the inverted position (negative bending) and one specimen had a more conventional AAA concrete mix applied. During each of the tests, measurements were recorded at approximately 1 kip (4.4 kN) intervals. Displacement and strain readings at mid-span were recorded at each of these increments. Strain readings were recovered via DEMEC targets attached at various depths across the cross section and allowed for strain profiles to be generated at each loading interval. The strain profiles along with the cracking patterns were then used to determine if the test specimens exhibited composite or non-composite behavior.The test results showed that all slabs did behave in composite manner and reached desired strengths, when compared to plane section analyses. Strain profiles remained linear through the interface region indicating that delaminations had not occurred. Cracking patterns also propagated through the interface region without indicating bond damage. Thus, it is recommended that bridge decks repaired by means of HD and application of a LMC overlay be rated as if they are behaving in a composite fashion." @default.
- W585547803 created "2016-06-24" @default.
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- W585547803 date "2014-01-29" @default.
- W585547803 modified "2023-09-26" @default.
- W585547803 title "Structural Evaluation of Slab Rehabilitation by Method of Hydrodemolition and Latex Modified Overlay" @default.
- W585547803 hasPublicationYear "2014" @default.
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