Bridges are complex engineering structures that must withstand high loads, temperature variations, moisture, and vibrations. Expanded clay, also known as lightweight expanded clay aggregate (LECA), is increasingly recognized as an innovative material that satisfies these critical structural requirements.

• 100% natural, non-toxic, non-degradable.
• Fire classification: NG (GOST 30244).
In the event of accidents, no toxic smoke or fumes are released.
In Japan, fire-resistant slabs using expanded clay are used in seismic regions (e.g., Tokyo Bay Bridge, 2010).

• Thermal conductivity: λ = 0.10–0.18 W/m·K (3× lower than concrete).
Reduces ice accumulation on walkways and enhances energy efficiency.

• Lightweight fill with expanded clay settles less and retains structure.
Replaces heavy fill or gravel in marshy or unstable zones.
According to LECA Sweden, a 20 cm layer reduces pressure on the foundation by 30–40%, ideal beneath bridge supports.

• Expanded clay resists ≥300 freeze–thaw cycles (GOST 9758:2001).
Ideal for open environments, river crossings, and mountainous regions.
In Finland, Norway, and Russia, bridges using expanded clay concrete have performed well since the 1970s (e.g., Murmansk, Arkhangelsk).

• Density of expanded clay concrete: 800–1200 kg/m³
• Standard concrete: 2400–2500 kg/m³
This reduces the load on the foundation by 2 to 3 times, which is crucial for bridge decks, sidewalks, and sidewalls.
European standards (EN 206, EN 1992-1-1) allow lightweight concrete in bridge superstructures, especially in seismic and geotechnically sensitive areas.

Conclusion: Total construction costs decrease by 15–20%.

Conclusion: 30% faster construction with smaller teams and equipment.

🔷 Expanded clay and expanded clay concrete provide a safe, durable, and energy-efficient material solution for modern bridge projects.
🔷 Actively implemented in Europe, Japan, Russia, and Scandinavia, especially in seismically active and wet areas.
We recommend officially incorporating expanded clay in all bridge designs in Uzbekistan — particularly in mountainous and riverbank areas — with full technical and economic justification.

• 🇸🇪 Sweden’s Trafikverket: reported 18–22% project cost savings with expanded clay
• 🇷🇺 Russia's Rosavtodor: saved 3–4 billion RUB/km by switching to expanded clay fill (2019)
• 🇯🇵 Japan: reduced thermal-related operational costs by 12%