Hollow Core Polystyrene (Hordi Foam Board)
Overview
Hordi foam board is a lightweight expanded polystyrene (EPS) block used in slab construction systems, especially for creating voids between reinforced concrete ribs. It reduces dead load, saves concrete and steel, and enhances thermal insulation in slab systems of buildings.
Main Uses
- Used as a void former in ribbed slab systems
- Reduces overall slab weight in large spans
- Enhances insulation in floor and roof slabs
- Applied in commercial, residential, and industrial construction
- Used in precast and cast-in-place systems
Technical Specifications
| Property | Value |
|---|---|
| Material | Expanded Polystyrene (EPS) |
| Color | White |
| Shape | Rectangular / Trapezoidal / Custom |
| Length | 100 cm to 200 cm |
| Width | 40 cm to 60 cm |
| Height | 20 cm to 40 cm |
| Density | 10–20 kg/m³ |
| Thermal Conductivity | 0.035–0.040 W/m·K |
| Fire Resistance | Limited (requires fire-resistant covering) |
| Compressive Strength | 70–200 kPa |
| Water Absorption | <2% |
Advantages
- Lightweight and reduces structural load
- Speeds up slab casting process
- Saves concrete and steel costs
- Excellent thermal insulation properties
- Easy to install and handle
- Customizable shapes and sizes
Application Cases
- Ribbed slabs in residential towers
- Large-span halls and warehouses
- Lightweight roof slab systems
- Commercial buildings with minimal structural load
- Precast floor units for fast-track construction
Installation Tips
- Place foam blocks between formwork or beam ribs
- Ensure alignment for proper concrete flow
- Support with form ties if needed during casting
- Cover with mesh and pour concrete above
- Use fire-resistant topping if required by code
