Title: UHPC Overlay Installation Methods – Contractor Perspective

Author(s): Seibert

Publication: Web Session

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Date: 10/17/2021

Abstract:
UHPC overlays are an ideal solution for bridge owners to preserve, repair and improve bridge conditions cost effectively. Throughout the last couple of years, multiple UHPC overlays were installed to improve the service life and performance of deteriorating bridge structures across the US. These projects taught the North American UHPC industry many lessons on the proper mix preparation, material movement, curing, and finishing overlay surface. This presentation will discuss several UHPC overlay projects and installation methods from a contractor’s perspective. Lessons learned for a successful UHPC overlay installation and the use of a Thin Lift UHPC Overlay paving machine capable of paving lanes in widths from 8‘(2.4 m) to 30‘(9.1 m) will be reviewed. Innovative Thin Lift UHPC Paving machines help bridge agencies to accelerate bridge deck repairs by shortening the total construction schedule, by minimizing traffic interruptions, and by reducing the overall project costs. Several project overviews, surface preparation and innovative construction techniques of multiple successfully completed UHPC overlay projects across the USA will be described.