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FOAMS AND POLYMERS

TMB Foam

FOAMS

In order to make the progress of the TBMs easier and faster Cormix has developed a range of injection foams and polymers for injection at the tunnel face modifying the grounds properties including , permeability , plasticity , workability and texture in addition to reducing friction and abrasion at the cutter head .

Ground conditioning is dependent on the specific geological conditions and the equipment used FOAMS

The use of soil conditioning foams can allow EPD TBMs to achieve better advance rates , reduce torque with less wear and tear on the machine even in poor ground conditions. Cormix has various grades of foam to meet  all exacting conditions .

Solutions

PRODUCTS

DESCRIPTION

TDS

CORMIX SCF

Foaming agent for soil conditioning with shielded tunnel boring machines.

CORMIX SCF1

Foaming agent with polymer for soil conditioning of clay and sandy silty clay.

CORMIX SCF2

Foaming agent with polymer for use in sand, clay and silt.

CORMIX SCF3

Foaming agent with polymer for use in silty gravel and sands.

SCHEMATIC DIAGRAM : APPLICATION RANGE – EPB SHIELD

SOIL CONDITIONING

Comparison Soil Conditioning Foam Polymer

POLYMERS

Cormix polymers are used in conditions where water increases and foam alone is not enough . Used in ground conditions containing fine sand,silts or clay and gravels in conjunction with Cormix SCF foams

Cotmix polymers for TBMs excavation are formulated for the following properties :

  • Drying out ground conditions
  • Reducing segregation in the TBM mixing chamber
  • Reduction in stickiness and adhesion to metal surfaces

Solutions

PRODUCTS

DESCRIPTION

TDS

CORMIX TBM P3

Liquid lubricating polymer for soil conditions involving sand, silt or clay with high water contents.


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