Case Study - Filling Voids Beneath the Floor in a Parking Garage

An Atlanta contractor contacted Alchatek for assistance with a void filling job in the parking garage at Brookhaven City Hall. The bottom floor of the garage exhibited significant voids beneath the concrete slab, posing risks of settlement and structural instability.

Initial Assessment

An Alchatek support technician worked with the contractor to conduct a thorough assessment and implemented a targeted void-filling solution to restore stability.

Proposed Solution

Alchatek recommended using AP Lift 430 Fast, a high-performance polyurethane foam designed for rapid void filling and stabilization. This material was selected for its quick-setting properties, high compressive strength, and ability to effectively fill voids while providing robust support for the concrete slab. The approach ensured minimal disruption to the parking garage operations, as it required no extensive excavation.

Procedures

1. Established a grid pattern to guide the placement of injection points on the bottom floor of the parking garage.
2. Drilled holes through the concrete slab at strategically determined injection points to access the voids beneath.
3. Injected AP Lift 430 Fast polyurethane foam into the drilled holes, ensuring comprehensive void coverage from bottom to top.
4. Patched drilled holes to restore the surface integrity of the concrete slab.

Results

The void-filling project at the Brookhaven City Hall parking garage was a success. The application of AP Lift 430 Fast effectively filled all identified voids, eliminating the risk of further settlement. The stabilized concrete slab restored the structural integrity of the garage floor, ensuring a safe and functional environment for vehicles and pedestrians. The solution minimized operational downtime and avoided costly excavation, preserving the facility’s functionality.

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