Slurry Walls

About Slurry Walls

Aarsleff Ground Engineering offer Slurry cut-off walls to prevent migration of groundwater, or polluted and contaminated materials present in the ground. Aarsleff has the specialist plant and labour to fulfil complex solutions complemented by years of expertise and experience designing and installing Slurry walls, also known as a cut-off slurry wall.

Aarsleff’s single-phase, self-hardening slurry trench cut-off walls are constructed by excavating a trench under a cement/bentonite slurry. The slurry remains fluid during excavation, and in this state allows the formation of a filter cake of bentonite on the side walls enabling the hydrostatic pressure of the slurry to prevent the collapse of the trench. Due to the cementitious content the slurry hardens within about 24 hours to form the low permeability barrier. The hardened slurry has a low permeability, typically 1×10-8 to1×10-10 m/s and the strength properties of a stiff clay but it does not possess the plastic properties of clay.

Most slurry trench cut-off walls built in the UK are 0.6 m wide. The practical maximum width is 1.5 m, although a width of more than 1.0 m is unusual. In most ground conditions, trenches can be excavated to about 12-15m deep using hydraulic back-actors (backhoes). For depths below this, and in particularly difficult ground conditions, diaphragm wall grabs or cutters are used. Slurry walls are normally keyed into an aquiclude; an underlying layer of low permeability material.

Slurry cut-off walls offer the following advantages

  • Quick Installation
  • Low-cost solution for low permeability barriers
  • The use of high replacement CEMIII cementitious materials in the cement bentonite slurry mix design not only significantly reduces the carbon footprint of the mix but actually reduces the permeability of the cured material when compared to OPC.

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For more information about Aarsleff Ground Engineering or to send in your enquiry,
call 01636 611140 and speak to an expert member of our team today.

A leading UK ground engineering specialist, focusing on multi-discipline excellence and value engineering. We design and deliver some of the UK’s largest ground engineering projects.

Our vision is to bring confidence to those constructing the landscape of tomorrow .

1947. Central Jutland, Denmark. Per Aarsleff borrowed 10,000 Danish Kroner from his father’s life insurance, bought an excavator, and founded Northern Europe’s leading contracting company.

Our biggest asset, our team is composed of the leading experts in ground engineering. Working with collaboration and cohesion at the core of our business, we can guarantee a quick and founded answer to all your questions.

We recruit and reward our people based on our ‘Step into the Blue’ company culture, where we embrace the core values of Life and Health, Trust, and Responsibility.

We do everything to ensure our team and yours work safely on our sites. With our core value of Life & Health, we see safety as a cultural pillar.

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The projects that keep society running. Bridges, buildings, transit and rail facilities, embankment support, marine and offshore facilities, mines, airports, and water projects.

Keeping things turning. Sewage Treatment Works, Waste Water Treatment Works, Wind Farms and Wind Turbines, Biomass Plants, and Power stations.

Meeting society’s needs. Nursing and care homes, MOD buildings, Schools and Universities, and small or large-sized residential developments.

Staying on the move. Remediation, bridges, and foundation work are integral to keeping the industry running smoothly.

The landscape of the marketplace. Mega-retail sheds, distribution warehouses, University accommodation, and major supermarket and household name units.

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Technically trained estimators and a dedicated, in-house design team means we consider value-engineering at every stage of your project.

More than just a model, Visual Design & Construction is a tool to encourage collaboration and improve quality across all facets of a scheme.

From large commercial sheds to small residential plots, piling could be the foundation solution you need to support your project.

Issues around collapse, slipping or erosion? Our experts in retaining solutions have a broad portfolio of techniques designed to fix even the most nuanced of sites.

Tricky ground conditions or requirements? Aarsleff’s ground engineering team work on stabilisation through a varied range of techniques, bespoke to the properties of your site ground.

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