Type of Document Master's Thesis Author Galagedera, Nandadeva Lalith URN etd-04182009-041358 Title Integrity and effectiveness of standard preformed membranes placed on concrete bridge decks Degree Master of Science Department Civil Engineering Advisory Committee
Advisor Name Title Weyers, Richard E. Committee Chair Al-Qadi, Imadeddin L. Committee Member Drew, Donald R. Committee Member Walker, Richard D. Committee Member Keywords
- Concrete bridges
Date of Defense 1991-09-09 Availability restricted Abstract
Waterproofing membranes have been used on bridge decks for almost three decades in order to prevent chloride ingress into concrete. However, the performance of these membranes have yet to be adequately evaluated. Therefore, this research was carried out primarily to evaluate the integrity and effectiveness of standard preformed membranes placed on concrete bridge decks.
The actual conditions of a bridge deck were simulated in the laboratory using scaled-down reinforced concrete specimens. Forty-eight outdoor and twelve indoor specimens were cast. Three types of standard preformed membranes (Bithuthene 5000, Royston lOA, and Protecto Wrap M400-A), punctured with holes of various sizes and frequencies per unit area, were placed on the specim~ns. All of the specimens were overlaid with 2.5 inches of hot-mix asphalt, except four outdoor (control) specimens and three indoor specimens.
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