As part of the redevelopment of the Sparrows Point industrial area of Baltimore, three bridges needed to be replaced.
When the bridges were originally constructed, the embankments were built with industrial byproducts over underlying compressible soils. As part of the reconstruction, the embankments needed to be widened and raised up to five feet to increase clearance below the bridges for both highway and rail traffic.
Due to the underlying compressible soils, there were concerns that the approximately 30,000 cubic yards of fill material needed would induce differential settlement.
CJGeo proposed 25lb/cuft cellular concrete as a lightweight fill material buildable with locally-sourced materials to reduce transportation related risks and exposure to trucking shortages. Cellular concrete was several hundred thousand dollars less expensive than either LESA or FGA, didn’t require onsite stockpiling, and freed up the general contractor’s labor force to perform work other than placing aggregate.