First Use of Lightweight High-Performance Concrete Beams in Virginia


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Title: First Use of Lightweight High-Performance Concrete Beams in Virginia

Author(s): C. Ozyildirim, T. Cousins and J. Gomez

Publication: Special Publication

Volume: 218


Appears on pages(s): 1-8

Keywords: development length; flexural strength; high-performance concrete; lightweight concrete; low-permeability concrete; prestressed concrete bridge beams; structural testing; transfer length

Date: 2/1/2004

An experimental program was planned and executed to demonstrate the feasibility of using lightweight high performance concrete (LWHPC) bridge beams and decks. The prestressed American Association of State Highway and Transportation Officials (AASHTO) beams were designed for a minimum 28-day compressive strength of 8,000 psi (55 MPa) and the deck concrete for 4,000 psi (27.6 MPa). The maximum permeability was 1500 coulombs for the beam and 2500 coulombs for the deck concrete. The density was less than 120lb/ft3 (1920 kg/m3). This program was a necessary prelude to an LWHPC demonstration bridge built over the Chickahominy River on Route 106 at the Charles City County New Kent County line in Virginia.