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- W581363906 abstract "Three prestressed bridge deck planks, removed due to alkali aggregate reaction (AAR)/delayed ettringite formation (DEF), were investigated for durability and strength to determine whether similar elements in other bridges need replacement. Compressive strength of cores taken from two planks containing reactive acid igneous rock was 65-70 megapascals (MPa), whereas that of the plank containing reactive meta-sedimentary rock was 38 MPa (design strength=40 MPa). AAR significantly reduced the elastic modulus of concrete, causing large deflections in planks under loading, giving adequate warning before failure at ultimate load capacity. Ultimate strength was not significantly affected by the AAR, indicating that performance of planks was governed by prestressing wires and their bond strength, which was not significantly affected by AAR at present age. Residual expansion potential of concrete was high; indicating further deterioration can be expected. Despite adequate ultimate strength at present, long-term performance of planks is at risk due to the large residual expansion potential." @default.
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- W581363906 date "2008-06-01" @default.
- W581363906 modified "2023-09-27" @default.
- W581363906 title "Durability and strength assessment of AAR-affected bridge deck planks" @default.
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