What are the standard available thicknesses for cement bonded particle boards?

Standard thicknesses include 6, 8, 10, 12, 16, 20, 25, 30, and 40 mm as per Clause 6.1.

What is the specified density of these boards?

The nominal density should be between 1000 and 1400 kg/m³ (Table 2).

Is this board waterproof?

It is highly water-resistant, not fully waterproof. The maximum water absorption after 24 hours immersion should not exceed 15% by mass (Table 2).

What is the minimum bending strength (Modulus of Rupture) required?

For boards thicker than 20mm, the minimum MOR is 9.0 N/mm². For boards 8mm to 20mm thick, it is 12.0 N/mm² (Table 3).

IS 14276

: 1995

Cement bonded particle boards -Specification

CurrentSpecializedSpecificationBIMMaterials Science · Wood and Other Lignocellulosic Products

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This standard specifies the requirements for cement bonded particle boards (CBPB), a composite material made from wood particles/lignocellulosic material and a cement binder. It covers terminology, materials, dimensions, physical and mechanical properties, and the methods for testing and inspection.

Cement bonded particle boards -Specification

Quick Reference Values

Nominal Density1000 to 1400 kg/m³

Standard Thicknesses6, 8, 10, 12, 16, 20, 25, 30, 40 mm

Minimum Modulus of Rupture (boards > 20mm thick)9.0 N/mm²

Minimum Modulus of Elasticity in Bending (boards > 20mm thick)3000 N/mm²

Maximum Water Absorption (24h immersion)15 % by mass

Maximum Swelling in Thickness (24h immersion)2.0 %

Moisture Content9 ± 3 %

Practical Notes

CBPBs are heavier and more brittle than plywood or gypsum boards but offer superior resistance to fire, moisture, and termites.

Cutting these boards requires special carbide-tipped blades due to their abrasive cement content.

Ensure proper sealing of edges and joints to maximize water resistance, especially in wet areas or for external use.