24 Years Strong: Leca® Lightweight Aggregate Proves Its Long-Term Durability in Estonia
Leca International is proud to share remarkable findings from a long-term case study conducted in Estonia, which confirms the exceptional durability and resilience of Leca® Lightweight Aggregate (LWA). After 24 years of continuous use under harsh environmental conditions, a road built using Leca LWA has demonstrated minimal degradation—cementing Leca's position as a leader in sustainable, long-lasting construction materials.
The Varska Road Case: A Real-World Durability Test
In the early 2000s, a 160-meter access road to the Estonian Border Guard station in Varska—located on the muddy banks of Lake Pihkva—was constructed using 10–20 mm Leca® LWA. Designed to withstand the extreme climate of southern Estonia, with temperatures ranging from -30°C to +30°C, the road has supported regular traffic and fluctuating water levels for over two decades.
Test Drilling and Results (March 2024)
To assess the long-term performance of the material, the Estonian Transport Authority conducted test drilling in March 2024. Their focus: volumetric weight under submerged conditions and fraction size stability.
Volumetric Weight:
- Design norms anticipate up to 1,000 kg/m³ in submerged states. However, the Varska road recorded significantly lower values:
- 570–610 kg/m³ in semi-submerged conditions
- 700–730 kg/m³ in fully submerged areas
This indicates a 30% performance improvement over expectations, emphasizing Leca LWA’s structural integrity.
Fraction Size:
- Despite exposure to traffic loads and environmental stressors, 90% of the Leca LWA particles remained intact after 24 years—a testament to its strength and low degradation rate.
A Proven Solution for Sustainable Construction
This long-term case study showcases Leca® LWA’s ability to maintain performance in extreme environments. For civil engineers, infrastructure planners, and sustainability advocates, the Varska road is a living example of how Leca® LWA delivers durability, efficiency, and peace of mind—even decades after installation.
Why Choose Leca® LWA?
- Lightweight but Strong: Reduces load on foundations while offering high stability
- Thermal & Acoustic Insulation: Performs well in variable climates
- Resilient to Water & Frost: Ideal for submerged and wet conditions
- Proven Track Record: Backed by over 70 years of global application and now, 24 years of success in Estonia
Ready to build with materials that last a generation?
Explore the full benefits of Leca® Lightweight Aggregate for your next infrastructure project.
