Ecofill SF

Ecofill SF has been developed as an engineered backfill solution for reinforced retaining walls, anchored retaining walls and embankments. Retaining walls rely on consistent, high-quality backfill to resist lateral pressures and maintain long-term stability. Traditional imported materials can vary in quality, creating risks for settlement, wall movement, or even structural failure. Ecofill SF removes this uncertainty by transforming on-site clays and sub-soils into a uniform, engineered material with the addition of a specialist performance-enhancing additive.

Optimised Backfill for Reinforced Soil Zones

In reinforced soil retaining walls, backfill typically includes:

  • The soil inside the reinforced zone, which interlocks with geogrids or other reinforcements.
  • The backfill wedge beyond the reinforcement, which reduces the loads applied to the reinforced zone and increases overall stability.

Ecofill SF is designed for both zones, delivering consistent stiffness and improved shear performance. Even soils with high moisture content or low natural strength can be processed into a reliable, high-quality engineered fill, reducing settlement and supporting the retained soil effectively.

Key Benefits

  • Produces consistent backfill directly on site
  • Results in enhanced stiffness and shear strength
  • Reduces differential settlement
  • Enables reuse of challenging soils as structural fill

Compliance with Industry Standards

Ecofill SF is a sustainable alternative to selected ‘well-graded granular materials’ used as fill for reinforced and anchored earth structures under Series 600 of the Specification for Highway Works (commonly Class 6I/6J/6N materials). 

This ensures Ecofill SF meets recognised structural performance requirements while providing a predictable, engineered solution for modern retaining wall construction.

globe_circle_icon

Shear Strength and Structural Performance Economy

Shear box testing demonstrates Ecofill SF’s significant improvement in resistance to lateral pressures typical of retaining wall applications. The additive formulation minimises soil movement, helping walls maintain integrity under varying loads.

globe icon@2x

Performance Highlights

  • Improves resistance to lateral earth pressures
  • Cuts transport and handling costs
  • Delivers consistent backfill directly on site
globe icon@2x

Environmental Benefits

Ecofill SF supports low-carbon construction by reprocessing site-won clays and sub-soils into high-quality engineered fill. This reduces waste, minimises landfill disposal, and lowers project carbon emissions.

globe icon@2x

Sustainability Benefits

  • Lowers embodied carbon compared to imported fill
  • Minimises material disposal and waste
  • Reduces lorry movements and site disruption
  • Supports environmentally responsible construction

Why Choose Ecofill SF?

Ecofill SF offers contractors a dependable, cost-effective, and sustainable solution for retaining wall backfill. By transforming as-dug soils into a consistent engineered material with a proven additive, it enhances wall performance, reduces reliance on imported aggregates, and supports modern, low-carbon construction practices. Ecofill SF can be used on all retaining wall and embankment designs, providing versatility and reliability across a wide range of civil engineering projects.

Ecofill: Build A Better Future