Geotechnical Lightweight Fill

Weighing in at just 1% the weight of conventional fill, POLYROCK® blocks are super fast and easy to install and virtually eliminate the lateral and vertical movement and complete bearing failure often associated with road construction on poor load bearing soils. There is also minimal settlement or long-term compression of soil layers. This can lead to substantially reduced costs for structures, foundations or ground improvements and on going maintenance costs.

POLYROCK® is suitable for numerous geotechnical applications where a dramatic reduction in vertical and/or lateral loads is required.

Benefits of POLYROCK® EPS

  • Practical and economical
  • 1% the weight of traditional fills
  • Considerable programme efficiencies
  • Virtually eliminates lateral loadings
  • Reduced ground loadings
  • Minimal settling
  • Minimal long-term compression of soil layers
  • Reduces differential settlement

Uses of POLYROCK® in construction

After 30 years of international testing and monitoring, we have found many uses for POLYROCK®. Our technical staff can provide you with any international data you need and are ready to discuss POLYROCK® EPS applications for your specific project.

  • Abutment backfill to reduce lateral pressure and differential settlements at bridge abutments
  • Construction of hillside roading embankments in steep terrain
  • Lightweight fill for the protection of existing services such as storm water or sewerage pipe systems
  • Road embankments; reduce loads on subsoil compared to conventional embankments
  • Geotechnical fill over poor load-bearing subsoil for roading or embankments
  • Backfill behind earth retaining structures
  • Structural fill beneath buildings
  • Repairing damage caused by subsidence and settlement
  • Bridging sensitive underground structures
  • Replacement of poor soils
  • Reduction of differential settlement
  • Problem sites with difficult or restricted access
  • Protection from frost heave

Compression and density

POLYROCK® is a thermoplastic material that under compressive loads acts in a viscoelastic manner. POLYROCK®'s most important characteristic is its very low density. Typically ranging from 15/kgm³ to 28kg/m³, densities can be customised for specific applications.

Physical Properties

Despite its low density POLYROCK® absorbs only a limited amount of water.

Chemical Resistance

At ambient temperatures, POLYROCK® is chemically resistant to most substances naturally occurring in the ground and a wide range of other substances such as sea water, dilute acids, alkalines and bleaching agents. In high concentration, substances such as animal fats, diesel fuel, organic solvent, petrol and concentrated acids will affect the surface of POLYROCK® to varying degrees. Although such high concentrations are uncommon, POLYROCK® can be protected from chemical attack as an additional safeguard.