Experience with Epoxy Polymer Concrete Bridge Deck Thin Overlays in Service for Over 10 Years

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Title: Experience with Epoxy Polymer Concrete Bridge Deck Thin Overlays in Service for Over 10 Years

Author(s): Shree Nabar and Peter Mendis

Publication: Special Publication

Volume: 169

Issue:

Appears on pages(s): 1-17

Keywords: Aggregates; bridge decks; epoxy resins; mixing; parking facilities; permeability; polymer concrete; protective coatings (polymers); skid resistance

Date: 5/1/1997

Abstract:
Repair and maintenance of aging bridge decks and parking decks has become increasingly important due to concrete and steel deterioration from exposure to deicing salts, acid rain, and other hostile elements. Rapid curing thin polymer concrete overlay offers a cost-effective option in protecting and extending the service life of the deck. The paper discusses the performance, physical properties and application techniques using a flexible epoxy polymer overlay. The low modulus epoxy binder is designed to achieve a balance between toughness and flexibility. With the use of gap graded aggregates, the flexible epoxy binder system provides low permeability, enhanced skid resistance while accommodating thermal and mechanical stresses. The outstanding performance and service life of flexible epoxy overlays has been documented in the SHRP study in 1991. The importance of proper surface preparation and quality control during application is critical to the success and durability of the overlay.