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Injected polyurethane slab jacking : interim report
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Filetype[PDF-520.21 KB]

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  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
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  • Abstract:
    Conventional methods for raising in-place concrete slabs to align roadway sections or to counteract subsidence requires pressure-injecting grout under the slab. As other transportation organizations have had success with the URETEK Method, which utilizes injected polyurethane, Oregon DOT elected use this method to raise and stabilize a bridge end panel and adjacent concrete slab. A two-year project was initiated to monitor the stability of the injected slabs and to evaluate the material. Benchmark elevation measurements were made for comparison with future elevation data. Density and strength of the polyurethane material was documented and will be compared to similar measurements after approximately 22 months of underground exposure. The ability of the injected polyurethane to penetrate through holes was characterized. An attempt was made to measure the water permeability of the material. 31 p.

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