Slab Lifting Knowledge

Slab lifting is the process whereby sunken concrete slabs or structures are lifted back to level with precision.

Traditional methods use cement grouts (Slab Jacking) with varying degrees of success often resulting in less than accurate lifts, considerable disruption, mess and longer term failures. Today the alternative is lifting slabs or structures with rigid, high strength structural, non-shrink, non-disruptive, lightweight, environmentally friendly  polyurethane foams Contite Slab Lift in combination with other polyurethane foams and gels used to grout various soil conditions  stabilizing the soil

Changing soil conditions via such processes as errosion, ground water movement, water extraction, decomposition and freeze thaw may lead to foundation damage or failure

Cormix provides a range of soil stabilization solutions to inject into the soil strengthening and binding it to provide a watertight solid base

Structures that may be relevelled and stabilized with Cormix systems include:

Roads and Highways, Runways and taxi ways, bridges ,rail crossings, sea and river walls, pools, tanks, tunnels and many other concrete structures

The types of grouting/injection can be divided into a number of main areas:

• Cavity filling (Click)
• Permeation Grouting (Click)
• Consolidation grouting (Click)

 

WHAT IT IS AND DOES?

Cormix rigid non shrink fast reacting technology ensures a permanent, rapid, clean solution to slab lifting and soil stabilization Contite Slab Lift ensures a permanent precision lift with high strength rigid foam

• A polyurethane structural foam.
• Injected of expanding polymer.
• Deep Injection through tubes up to 8 m deep.
• Constantly monitored.
• Compacts weak soil zones.
• Voids are filled.
• Lifts & realigns.
• Base soil strengthened.
• Restores load bearing capacity.
• High Density hydro polymer.

 

HOW DOES CONTITE SLAB LIFT WORK?

Contite Slab Lift is a two component structural polyurethane foam for concrete slab lifting and soil stabilization.

Contite Slab Lift may be used for concrete slab lifting & soil stabilization by improving load bearing capacity of loose soils, filling of large voids, cracks and crevices.

Contite Slab Lift is injected into the ground to the required depth restoring load bearing capacity, densifying and strengthening soils with rigid high strength foams that displace or react away water, compacting soil before finally lifting the structure or pavement back to alignment on a sound base.

 

WHAT ARE THE ADVANTAGES OF CONTITE SLAB LIFT?

• Phthalates free resins.
• Solvent free.
• Fast or slow reactions available.
• Easy mixing 1:1 by volume.
• Low cost lifting of concrete structures/slabs.
• Can be applied in dry or wet conditions.
• Environmentally friendly.
• Rapid strength gain. Traffic ready in 15 minutes.
• Expands 20-30 times unconfined.
• High strength.
• Non shrink.
• Bonds with soil and concrete.
• Stops repeated water erosion.
• Precision lifting.

 

The types of grouting/injection can be divided into a number of main areas:

• Cavity filling (Click)
• Permeation Grouting (Click)
• Consolidation grouting (Click)

Structures that may be relevelled and stabilized with Cormix systems include:

Roads and Highways, Runways and taxi ways, bridges, rail crossings, sea and river walls, pools, tanks, tunnels and many other concrete structures

 

Advantages of Slab Lifting

• No mess
• No shrinkage
• Long term stable
• Quick and non-disruptive to working environment
• Stabilizes surrounding soils
• Stops washout
• Environmentally friendly
• High strength not brittle

 

BENEFITE OF CORMIX POLYURETHANE PRECISION SLAB LIFTING WITH MUD JACKING

Cormix soil stabilization and slab lifting grouts provide long term solutions and advantages that are controlled these include:

• Soil compaction and stabilization,
• Control or stopping of water movement
• Large void and cavity filling with rigid foam
• Slab lifting to tight tolerances

 

DISADVANTAGE OF CEMENTITIOUS GROUTING
COMPARED TO CONTITE SLAB LIFT INJECTION

1. Ineffective
2. Short term solution – fails with time
3. Compounds the problem
4. Adds over burden weight (Foam 90% lighter)
5. Messy
6. Noisy
7. Chemical leaching & environmental pollution
8. Large volume of material

 

WHAT ARE THE BENEFITES OF THE CONTITE SLAB LIFT METHOD

• Zero excavation
• Densifies and strengthens soils
• Displaces water, increases soil density
• Environmentally friendly
• Non-destructive – less time & noise
• Keeps important assets in service, minimal interruption of operations
• Fast reaction, high strength for loads
• Water movement halted
• Enhances underground structures
• Stabilizing & sealing operation in one

 

TYPICAL APPLICATION INCLUDE : –

• Warehouse / Distribution Center / Depot / Container Terminal
• Heavy equipment foundation, factory floor
• Highway Pavement
• Bridge Approach
• Taxiway / Runway
• Railway Foundation
• Sealing Manhole