Existing Surface Preparation for Overlays – Pavement ...
Existing cracks other than those symptomatic of structural failure should be cleaned out (blown out with pressurized air and/or swept) and filled with a crack-sealing material when the cracks are clean and dry (TRB, 2000 [1]). Cracks less than about 10 mm (0.375 inches) in width may be too narrow for crack-sealing material to enter.
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