Rapid Concrete Bridge Deck Overlays

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Title: Rapid Concrete Bridge Deck Overlays

Author(s): M.M. Sprinkel

Publication: Special Publication

Volume: 278

Issue:

Appears on pages(s): 1-10

Keywords: overlays, polymer modified concrete, bridges, decks, latex, silica fume

Date: 3/1/2011

Abstract:
Hydraulic cement concrete overlays made with latex-modified concrete (LMC) and silica fume concrete (SFC) are typically used to extend the life of bridge decks because the overlays reduce the infiltration of water and chloride ions. Rapid concrete overlays can be used to reduce lane closure time and associated traffic congestion and road user costs. LMC prepared with very early hardening cement (LMC-VE) has been used as a rapid overlay for bridge decks in Virginia since 1997. This paper compares the performance of LMC-VE overlays to that of conventional LMC and SFC overlays. Results indicate that LMC-VE overlays are performing as well or better than LMC and SFC overlays. LMC-VE has become a standard overlay for situations in which lane closures cause major traffic congestion. The higher cost of materials for LMC-VE overlays can be off set by lower costs for traffic control. Including user cost savings make LMC-VE overlays even more cost effective.