The original work plan specified that laboratory tests would be conducted to determine the most suitable resins for overlay work. It must be pointed out that the Oregon State Highway Division was not set up to do polymer research, but only to test existing resin formulations that were readily available from chemical companies. After a literature search two generic resins were chosen for study. They were methyl methacrylate and polyester styrene. One of our major concerns was the ability to bond a polymer concrete overlay to an existing Portland cement concrete deck. The use of a resin tack coat was found to be necessary to acquire a minimum 200 psi bond shear value consistently. Different methods of cleaning the substrate concrete were examined and it was first thought only sandblasting was necessary to remove surface laitance. Later experiences proved scarification or scabbling is necessary to remove undersirable surface mortar if superior bonding is to be achieved. Early laboratory tests indicated that moisture could be tolerated in the substrate but his was also proven to be wrong in the field.
This report presents information on the installation of a thin polymer concrete overlay and the evaluation of its durability after a 15-month in-servi...
Oregon. Department of Transportation. Materials and Research Section
1995-07-01
Abstract:
This report documents the construction and performance of two thin polymer concrete (with polyester/styrene resins) bridge deck overlays. The overlays...
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