Concrete crack repair is done using injection packers and polyurethane or epoxy injection methods.
Slab lifting is a professional method used to raise and level sunken concrete such as driveways, sidewalks, warehouse floors, and foundations. Instead of replacing concrete, contractors use injection technology to restore slabs quickly and efficiently.
In real construction projects, uneven slabs are usually caused by soil erosion, water infiltration, or poor compaction. Over time, this leads to sinking, cracking, and safety hazards.
How Slab Lifting Works:
Step 1: Drill small holes (typically 12–16 mm) into the slab.
Step 2: Insert injection ports or packers.
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Step 3: Use an injection pump to inject polyurethane foam.
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Step 4: The foam expands and lifts the slab to the desired level.
Why Contractors Prefer Slab Lifting:
- Up to 70% cheaper than full replacement
- Completed in hours instead of days
- No demolition or heavy equipment
- Minimal disruption to property owners
Real Contractor Scenario:
A warehouse floor sinks due to water erosion. Instead of shutting down operations for days, contractors drill injection points and use polyurethane foam. Within 2–3 hours, the slab is lifted and ready for use.
Common Mistakes to Avoid:
- Over-injecting foam (causes over-lifting)
- Incorrect hole spacing
- Using low-quality injection equipment
- Poor pressure control
Recommended Equipment:
Professional slab lifting pumps and injection ports
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Q: What material is used for slab lifting?
A: Polyurethane foam or cement grout. PU foam is lightweight, fast, and precise.
Q: How long does slab lifting last?
A: Typically 10–20 years depending on soil conditions and installation quality.
Q: Is slab lifting better than replacement?
A: Yes. It is faster, more cost-effective, and less disruptive.
Q: Can I do slab lifting myself?
A: Small DIY projects are possible, but professional pumps and experience are recommended.
ACST provides professional injection packers, pumps, and slab lifting systems for contractors worldwide.
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