Lightweight Concrete and the New Benicia-Martinez Bridge
The new Benicia-Martinez Bridge across the Carquinez Strait in California utilizes high performance, sand-lightweight concrete for the cast-in-place segments of the superstructure. The bridge with span lengths up to 659 ft (201 m) was built using the balanced cantilever method of construction.    
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Lightweight Concrete for the Route 33 Bridge over the Mattaponi River
Lightweight high performance concrete was specified for the precast, prestressed concrete beams and the cast-in-place concrete deck for the Route 33 bridge over the Mattaponi River in Virginia. Specified properties included density, compressive strength, modulus of elasticity, creep, shrinkage, and permeability.     Full Article>

Jeff Danzer Bridge, Ohio
The Jeff Danzer Bridge is located over the Little Scioto River in Scioto County, Southern Ohio. The bridge is a 201-ft 6-in. (61.4-m) long, two-lane, single span, precast, prestressed concrete structure. Sand-lightweight concrete was used in the precast, spliced bulb-tee beams to reduce their shipping and handling weight.     Full Article>

Creep and Shrinkage of Structural Lightweight Concretes
Virginia has recently built several bridges with lightweight concrete superstructures including the Route 33 bridge over the Mattaponi River. The measurement programs for these structures indicated that the high creep and shrinkage values assumed in the designs were not accurate for the concretes in the precast, prestressed concrete beams. In fact, the creep coefficients and shrinkage strains measured in the lightweight concretes were the same as, or only slightly higher than, those measured in typical normal weight concrete superstructures.     Full Article>