MC-Bauchemie MC-Montan Drive LB 02
MC-Bauchemie’s ready-to-use liquid conditioner that binds free water in the ground ahead of an EPB tunnel boring machine, keeping the face stable and the drive moving.
What is it?
A liquid, ready-to-use soil-conditioning additive from MC-Bauchemie’s tunnelling range, purpose-built to bind large volumes of free water in the ground ahead of an earth pressure balance (EPB) tunnel boring machine.
Where is it used?
EPB TBM drives through highly permeable, water-bearing strata — loose rock, flowing sand, and soft ground prone to sudden water inflow — on metro, rail, road and utility tunnel projects.
Why use it?
Uncontrolled water at the cutterhead turns excavated soil into an unworkable slurry, risks face instability and can overwhelm the screw conveyor. LB 02 binds that free water so the muck stays plastic, impermeable and removable at a controlled rate.
How is it applied?
Metered directly into the excavation chamber or screw conveyor by the TBM’s onboard dosing system, at a rate the tunnelling team sets after trialling it against the actual soil and water conditions on the drive — frequently paired with an MC-Montan Drive FL foam conditioner.
About MC-Bauchemie MC-Montan Drive LB 02
MC-Montan Drive LB 02 sits in MC-Bauchemie’s specialist Tunnelling Systems range, built for one job: stopping water from taking over an EPB shield’s excavation chamber. Where an ordinary concrete admixture works in a batching plant, LB 02 works at the face — dosed into wet, permeable ground so the machine keeps advancing instead of stalling. MC-Bauchemie’s own data sheet describes it as a liquid additive with a very high water-absorbing capacity, ready to use straight from the drum, that improves how the excavated soil is removed and leaves the conditioned muck considerably less permeable. It’s also positioned for the harder scenario — a sudden mountain-water leak into the tunnel face — where drive speed and face stability matter more than on a routine dry-ground bore.
For Space Arc, this is a project-procurement item rather than a shelf product: it ships from MC-Bauchemie in 200 kg barrels or 1,000 kg IBCs, and the dosage isn’t a fixed number on the sheet — it’s set against the soil type and water content on each drive, ideally after a trial run and in consultation with MC-Bauchemie’s Business Unit Tunnelling. We handle that sourcing and technical coordination for contractors running EPB drives in Delhi NCR and other metro and infrastructure corridors, working alongside the tunnelling engineer rather than selling it as a standalone retail SKU. If your drive is hitting water-bearing sand, loose rock or flowing ground, this is the conversation to have before mobilising the conditioning system.
The technical insight
MC-Bauchemie doesn’t publish the exact chemical class on the public data sheet, but the behaviour described — very high water-binding capacity, a liquid that’s ready to use and fast enough to respond to a sudden water inflow — is consistent with the hydrophilic, water-absorbing additive chemistry used across the tunnelling industry for EPB conditioning in saturated ground. What it isn’t is a foaming agent: LB 02 binds free water rather than aerating the soil, which is why MC-Bauchemie explicitly designs it to be combined with the MC-Montan Drive FL foam range and the MC-Montan Device CT foam generator — the foam brings compressibility and lubrication, LB 02 brings water control, and EPB tunnelling teams typically tune the two together rather than relying on either alone.
Where it is used
- Soil conditioning for EPB tunnel boring machines advancing through water-bearing ground
- Highly permeable strata with active groundwater access
- Loose rock and flowing sand ahead of the cutterhead
- Emergency response to a sudden mountain-water leak at the tunnel face
- Metro, rail and road tunnel drives through saturated, mixed-face geology
- Combined dosing with MC-Montan Drive FL foam conditioners for balanced soil conditioning
- Screw-conveyor plug formation to hold face pressure in high water-pressure ground
- Utility and sewer microtunnelling through soft, wet strata
Key advantages
- Very high water-binding capacity, purpose-built for sudden water-inflow situations at the face
- Ready to use straight from the drum — no on-site mixing or activation step
- Improves soil removal and handling through the screw conveyor
- Leaves the conditioned soil markedly less permeable, helping hold face pressure
- Cost-effective dosing volumes relative to the drive speeds achieved
- Designed to be combined with the MC-Montan Drive FL foam range and MC-Montan Device CT generator for a tuned conditioning strategy
- Water hazard class WHC 1 and readily biodegradable, which simplifies handling and disposal on site
- Backed by MC-Bauchemie’s dedicated Business Unit Tunnelling for dosing consultation, not just a data sheet
Limitations & considerations
- No fixed dosage rate on the data sheet — it has to be trialled against the actual soil and water content on your drive, so lead time for a trial matters
- Purpose-built for TBM/EPB soil conditioning — not a substitute for a concrete admixture, waterproofing coating or grout anywhere else on the project
- A project-procurement item in India, sourced against a confirmed drive programme rather than held as retail stock, so factor in import lead time
- Shelf life is roughly six months in a sealed original container, and it needs frost-free, sunlight-protected storage — poor site storage shortens that
- The public data sheet doesn’t cite an external IS/ASTM/EN performance standard; quality assurance rests on MC-Bauchemie’s own ISO 9001 factory production control rather than a third-party test certificate
- Best performance on coarse, wet ground usually comes from pairing it with a foam conditioner, so budgeting for LB 02 alone can understate the full conditioning cost
Selection & best practice
Trial the dosage on representative soil and water samples from the actual drive before it’s locked into the mainline programme, and loop in MC-Bauchemie’s Business Unit Tunnelling early rather than after a stall. Dose directly into the chamber or screw conveyor through the TBM’s calibrated system, and recheck the rate whenever geology or water content shifts along the alignment. Store drums and IBCs frost-free and out of direct sunlight, and work through stock within the roughly six-month shelf life. Where the ground is coarse and cohesionless as well as wet, plan for it to run alongside an MC-Montan Drive FL foam rather than alone.
Specifications
| Product type | Liquid soil-conditioning additive for EPB tunnel boring machines |
| Colour | White to yellowish |
| Density | 1.20 – 1.22 kg/dm³ |
| Form | Liquid, ready to use |
| Water hazard class | WHC 1 (low hazard, per German WGK system) |
| Storage | Frost-free, protected from direct sunlight; min. 6 months in closed original container |
| Quality system | Factory production control per DIN EN ISO 9001 |
| Pack sizes | 200 kg barrels; 1,000 kg IBC |
| Combinability | Can be combined with MC-Montan Drive FL range and MC-Montan Device CT foam generator |
Industry use cases
Metro rail tunnelling
EPB shield advancing through saturated sand and gravel, where LB 02 keeps the excavated muck plastic and removable at speed instead of flowing back through the screw conveyor.
Mountain / hill road tunnelling
Sudden water inflow at the face during a rock tunnel drive, where LB 02’s high water-binding capacity is used to regain control of face pressure quickly.
Urban utility and sewer tunnelling
Microtunnelling through soft, water-bearing strata beneath a live road, where a stable, low-permeability conditioned soil reduces the risk of surface settlement.
Mixed-face metro corridors
Alignments that move between sand, silt and weathered rock in the same drive, where LB 02 is dosed alongside an MC-Montan Drive FL foam to handle the changing water content.
Contractor mobilisation and trial dosing
Early-stage trials on soil samples from the bore alignment to fix the dosage rate before the TBM reaches the critical water-bearing section.
Frequently asked questions
What does MC-Montan Drive LB 02 actually do inside the TBM?
Do we need a foam agent as well, or does LB 02 work on its own?
What’s the dosage rate?
Is this something Space Arc keeps in stock?
How do we store it on site?
Is it safe to handle and dispose of on an urban site?
How we position MC-Bauchemie MC-Montan Drive LB 02
LB 02 is one entry in MC-Bauchemie’s MC-Montan Drive conditioning family — it’s typically specified alongside MC-Montan Drive FL 04 (and FL 04 FR) for clay-heavy, clogging-prone ground, MC-Montan Drive CA 02 for dispersing sticky clays, MC-Montan Drive DF as a foam-breaking agent, and the MC-Montan Device CT foam generator that produces the foam these liquids are conditioned alongside. Genuine alternatives sit with the other specialist tunnelling-chemical houses active on Indian metro and infrastructure projects — BASF’s Master Builders Solutions (MEYCO) tunnelling range and Minova/Normet conditioning agents are the names a specifier would credibly shortlist against it. Fosroc doesn’t compete in this niche — its India range is built around concrete admixtures, waterproofing and repair rather than TBM soil conditioning, so it isn’t a genuine alternative for this specific application.
Related Concrete Admixtures products
Source MC-Bauchemie MC-Montan Drive LB 02 for your project
Authorised distribution, technical advice & professional application across Delhi NCR and Pan-India.