The Job
This Delaware lightweight fill project is located in Wilmington. The work was done as part of the Christina River Bridge project. This project installed a new, multi-modal bridge across the Christina River, near the Blue Rock's baseball field.
Wet batch generation of the CJFill-Ultra Lightweight.
The Challenge
Extensive compressible soils comprise the area, requiring the bridge abutment to sit on ground improvement. In order to optimize the ground improvement, the designer called for the use of lightweight fill within the abutment structure. The material had to be as light as possible, but also resist punch through from the ground improvement elements.
The Solution
Placing the CJFill-UL
CJGeo worked with the contractor to design a lightweight fill plan that utilized two classes of CJFill cellular concrete. 65lb/cuft CJFill-Under Water for the bottom three feet. This was the area subject to potential flood inundation, and poured directly on top of the ground improvement. With an unconfined compressive strength of nearly 1,000 psi, the material behaves as a low density load transfer platform. 25lb/cuft CJFill-Ultra Lightweight was the most appropriate material for the remainder of the fill height.
Due to the relatively low daily placement volumes, CJGeo used wet batch generation to make the material onsite.
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