11th Street Bridge Project

The 11th Street Bridge project is part of a group of three bridges separating local and freeway traffic to improve travel on both sides of the Anacostia River.  SK&A provided petrographic examination, concrete core drilling, and Ground Penetrating Radar (GPR) services for the bridge structure.

SK&A scanned the surface of the concrete deck with GPR and subsequently core drilled in six locations, to determine the effectiveness of the injected epoxy in existing cracks. The cracks in three of the cores were gravity filled with a low viscosity, moisture resistant epoxy resin used to heal and seal cracks.  Cracks in the other three cores were gravity filled with a high molecular weight methacrylate crack healer/penetrating sealer.  A petrographic examination was performed on the samples to determine microscopically, the width of the cracks as well as the depth and effectiveness of the epoxy penetration.