What is a bridge deck overlay and why is it important? - Chase …
To protect bridge decks from roadway salt and water penetration, as well as to improve ride quality over the structure, bridge engineers seal the decks with a variety of waterproofing systems. This “overlay” material is most often installed during bridge rehab projects but also installed on new bridges as well.
2018年3月6日 · Overlay moves along with the deck. This is a critical step in bonded bridge deck overlay success. Due to the thin overlay and large surface area, plastic/drying shrinkage is problematic. Limited bleed water and rapid evaporation induce cracking, curling, and warping.
When is a Deck Overlay Applied to a Bridge Deck? - UHPC …
2019年10月2日 · There are three possible options when an overlay may be applied to bridge deck overlays: An overlay for a new deck; A protective overlay for an existing deck; A structural overlay for an existing deck; Choosing an Overlay For a New Deck. Chlorides from deicing salts are the main cause of bridge deck deterioration.
PPC 1121 Polyester Polymer Concrete | Bridge Deck Overlays
Kwik Bond PPC 1121 polyester polymer concrete bridge deck overlays provide a 30-year solution, unequaled preservation, and a two-hour traffic return in a variety of conditions.
Perform work in accordance with Item 439, "Bridge Deck Overlays" to expose bar and provide a clearance of not less than 3/4”. concrete is destroyed, remove concrete (15 lb max chipping hammer)
Epoxies have been in use in the US for over 40 years as concrete bridge deck overlays. To seal cracks of the bridge deck. To prevent water and chloride ions from salt to penetrate the concrete. To protect corrosion in the deck’s reinforcing steel due to moisture intrusion.
Nondestructive Evaluation of Concrete Bridge Deck with Overlays
A bridge deck overlay system can improve the ride quality for drivers, add protection for embedded reinforcement, and/or modify the transverse profile and vertical alignment of the existing roadway to improve deck drainage. More than 10,000 bridges in the United States have been successfully rehabilitated using overlays.
Polymer Overlays, a Simple Introduction to the 3 Different Types
2020年11月1日 · Polymer bridge deck overlays are easy to specify, readily available, and have ample history to show their successes. When specified in the right conditions for the chosen style of overlay, they can achieve their anticipated service life.
TxDOT 2023 Bridge and Roadway Design Conference April 20, 2023 Why Overlays on Bridge Decks? • Protecting the Deck Surface o Protective barrier to prevent water from penetrating the deck by sealing the cracks o Protect against chemicals such as de-icing agents that can be corrosive to the bridge deck surface and reinforcing
Bridge Deck Concrete Polymer Overlay - Pavement Surface …
Endurablend’s “Ultra-Thin” properties provide an effective polymer bridge deck overlay solution for concrete surfaces. It consists of a polymer-modified cement applied at a thickness of 1/16" to 1/8" and can protect the surface from: Salts; De-icing materials; Petroleum; Most harsh chemicals