How to Lift Concrete Slabs
with Polyurethane Foam
Concrete Raising / Foam Jacking
Poly Jacking and Foam Jacking – Lifting Concrete Slabs with Plural Component Foam by SealBoss
Introduction
The innovative technique of Poly Jacking, also known as Foam Jacking, is rapidly gaining recognition.
This method, utilizing plural component structural polyurethane foams, offers a clean and quick solution for stabilizing and lifting sunken concrete slabs. This overview explains some nuances of this process, exploring its phases, methodologies, and the expertise SealBoss brings to the table.
What is Poly Jacking / Foam Jacking?
Poly Jacking, or Foam Jacking, is a specialized process designed to repair sunken and unstable concrete slabs. The technique involves injecting SealBoss 1640 Structural Strength Slab Lifting, Polyjacking, and Void Filling Foam beneath the concrete. This is achieved by drilling small holes and pumping the expansive foam under the slab, providing support and elevation.
The Inspection Phase
Evaluating the Site
Before commencing the Poly Jacking process, a thorough inspection of the slab lifting area is essential. This includes:
- Soil Condition Assessment:
Understanding soil conditions is vital, as discussed in our article, What Is Dynamic Cone Penetration Testing | SealBoss Deep-Soil-Lift“ - Structural Damage Analysis:
Identifying any structural damages to the concrete and the extent of support loss due to voids or cavities beneath is crucial - Measurement of Sunken Slabs:
Structural damages to the concrete slab and loss in support (voids/cavities) under the structure need to be determined. The actual loss in height of the sunken slabs of concrete have to be measured.
These factors collectively aid in predicting the success of the repair and determining the necessary materials and time.
The Repair Phase
Strategy and Execution
Prior to lifting a sunken piece of concrete slab the method of approach has to be determined to achieve the desired result.
The points of initial and subsequent injection and sequence of injection is crucial to lift a slab evenly and with the least stress to the concrete as possible, as concrete sections may crack. Even distribution of pressure during the process is key to lift a slab successfully.
When SealBoss polyjacking grout is first injected through drill hole in the slab it will initially fill any voids and cavities under the structure.
Once the voids are filled and the foam grout has gained strength, it will start to build pressure and compact the soil under the slab to the point where the soil is dense enough to support the foam pressure necessary for the slab to lift. Soil of lower density will compact more under pressure and may require more foam grout during the process.
As the pressure builds and the lifting process begins, the vertical movement of the slab has to be monitored closely. The points of injection may need to be alternated to keep forces and stresses to the slab as low as possible and to prevent cracks in the concrete. Even and steady lifting is the key to success.
During the lifting process the soil will continue to compact until reaching sufficient density to raise the slab to the desired elevation and level with the surrounding substrate.
Execution Steps Overview
- Determining the Approach:
Before lifting the sunken slab, an appropriate method must be planned to ensure the desired outcome - Injection Point and Sequence:
The choice of initial and subsequent injection points and their sequence is critical to evenly lift the slab and minimize stress and potential cracking - Void Filling and Strength Building:
Initially, SealBoss polyjacking grout fills voids and cavities, gaining strength to build pressure for lifting - Soil Compaction and Slab Elevation:
The foam grout compacts the underlying soil, enhancing its density to support the lifting process - Monitoring and Adjusting:
Continuous monitoring and adjusting injection points are essential to ensure even lifting and prevent concrete cracking - Achieving Desired Elevation:
The process continues until the slab is raised to the desired level, aligning with the surrounding surface
SealBoss Expertise and Support
SealBoss is not just a provider of high-quality poly jacking and slab lifting products; we are your partners in concrete repair. Our team of experts is always ready to assist with product information, equipment recommendations, and tailored solutions to meet your unique needs.
Conclusion
Poly Jacking / Foam Jacking with SealBoss 1640 Structural Strength Slab Lifting, Polyjacking, Void Filling Foam offers a groundbreaking approach to concrete repair. This technique not only ensures structural stability but also extends the lifespan of concrete slabs. Whether you are a professional contractor or a homeowner, understanding this process is the first step towards effective and lasting concrete repair solutions.
For more information and personalized assistance, contact SealBoss today. Our dedicated representatives are here to guide you through every step of your concrete repair journey.
