Technopol SA — Civil & Geotechnical
GeofoamLightweight Fill
Engineered, ultra-lightweight EPS fill material with a density of about 1% that of soil — minimising vertical and lateral loads, preventing settlement and reducing build time on traditional fill projects.
Product Description
Engineered Lightweight Fill
At its core, Geofoam is an engineered, ultra-lightweight fill material with a density of about 1% that of soil. This property offers its most dramatic advantage: minimising vertical and lateral loads. This prevents settlement, which can be a costly and time-consuming issue with traditional construction.
Geofoam is a quiet powerhouse in modern construction. Its applications showcase a shift in engineering philosophy — from relying on sheer mass and reinforcement to using smart, tailored materials that reduce loads and mitigate risks from the ground up.
- ~1% density of soil
- EPS12 – EPS30 grades
- Closed-cell, hydrophobic
- Lifted by 1 – 2 people
- Incidental thermal insulation
- Pavement engineering
- Retaining walls
- Buried-structure protection
- Slope stabilisation
- Urban load-sensitive features
Geofoam Properties
Technical Data
| Property | Typical Range | Notes |
|---|---|---|
| Density | 10 – 30 kg/m³ | EPS12 – EPS30 grades, depending on specification |
| Compressive Strength @ 1% strain | 15 – 100 kPa | Depends on density grade |
| Water Absorption | < 4% (EPS) | Closed-cell structure, hydrophobic |
| Block Sizes | 2.5 × 1.250 × 950 (typical) | Easily shaped and stacked |
| Weight | ~1% of soil | One block can be lifted by 1 – 2 people |
| Thermal Conductivity (k-value) | 0.030 – 0.038 W/m·K | Provides incidental insulation |
Applications
From the Ground Up
- Road & Rail Embankments
Reduce settlement on soft soils where traditional fill would overload the substrate. - Bridge Approaches
Minimise the ‘bump at the bridge’ caused by differential settlement between abutment and embankment. - Buried Structures
Protects tunnels, culverts and pipelines from imposed surcharge loads. - Void Fill
Quick backfill solution for irregular or large voids — easily shaped on site.
- Retaining Walls
Reduces lateral earth pressure behind retaining structures. - Slope Stabilisation
Replacing heavy slope soil with high-strength, lightweight Geofoam reduces gravity loads to stabilise landslide-prone areas. - Urban Construction
Enables high-strength, lightweight urban features — rooftop gardens, stadium seating — without compromising structural integrity. - Frost Heave Mitigation
The hydrophobic, closed-cell structure helps prevent frost-related ground movement.
Benefits
Smarter Fill, Smarter Build
Geofoam reflects a shift in engineering philosophy — from relying on sheer mass to using smart, tailored materials that reduce loads, accelerate schedules and lower the environmental impact of civil works.
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