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Material Sheet
Concrete Block

Hollow Concrete Block

What is it used for

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Residential Construction

Used for building walls and foundations, offering good thermal insulation and reducing the need for additional insulation materials.

Commercial Construction

Ideal for constructing commercial buildings due to their strength and ability to support heavy loads while also providing sound insulation.

Infrastructure Projects

Commonly used in infrastructure projects such as bridges, retaining walls, and tunnels, where durability and load-bearing capacity are critical.

Brick Wall


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Length: 440 mm

Width: 215 mm

Height: 215 mm

Volume: 0.0205 m³

Weight: Approximately 14-20 kg

What it’s Made From

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The primary binding material, providing strength and durability to the block.


Includes sand, gravel, and crushed stone, which add bulk and stability to the block.


Essential for the hydration process, which allows the cement to bind the aggregates together.


These can include materials like fly ash, slag, and chemical admixtures to enhance workability, durability, and strength.


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Standard Hollow Block

Description: Commonly used in most construction projects, offering a balance of strength and insulation.

Applications: Suitable for walls, foundations, and partitions.

Lightweight Hollow Block

Description: Made with lighter aggregates, reducing weight and improving ease of handling.

Applications: Ideal for non-load-bearing walls and partitions.

High-Strength Hollow Block

Description: Enhanced strength for heavy-duty applications.

Applications: Used in load-bearing walls and structural applications where higher strength is required.


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Tools Required

Trowel | Spirit level | Tape measure | Rubber mallet | Brick jointer

Materials Required

Hollow concrete blocks | Mortar mix | Water | Reinforcement bars (if needed)

Step-by-Step Guide:

  1. Preparation: Ensure the foundation is level and clear of debris.

  2. Mix Mortar: Prepare the mortar according to manufacturer’s instructions.

  3. Lay First Course: Apply a bed of mortar, place the first row of blocks, and ensure they are level.

  4. Insert Reinforcement: If needed, place reinforcement bars in the hollow cores.

  5. Build Up: Continue laying blocks with mortar, checking alignment and level.

  6. Fill Cores: For additional strength, some applications may require filling the hollow cores with concrete.

  7. Final Checks: Ensure all blocks are properly aligned and joints are filled.

Technical Specification

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Compressive Strength: 3.5-7.0 MPa

Water Absorption: < 10%

Thermal Conductivity: 0.50-0.70 W/mK

Density: 1500-2000 kg/m³


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BS EN 771-3: British Standard for Aggregate Concrete masonry units.

ISO 9001: Quality management systems ensuring consistent product quality.

Purchasing Quantities

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Single Units

Suitable for small projects, repairs, or when only a few blocks are needed.


Typically sold in bulk, with each pallet containing around 50 to 100 blocks. This option is suitable for medium to large construction projects.


Smaller quantities than pallets, often sold in bundles of 10, 20, or 30 blocks, suitable for minor projects or additions.

Environmental Impact

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Sustainability Considerations

Hollow concrete blocks can incorporate recycled materials like fly ash, reducing the environmental footprint. Their thermal properties also contribute to energy savings in buildings.

Eco-friendly Alternatives

Blocks made with supplementary cementitious materials (SCMs) like fly ash or slag can further reduce the carbon footprint.

Waste Reduction

Efficient design and manufacturing processes minimize waste. Any leftover blocks can be recycled.

Energy Efficiency

Good thermal mass properties help regulate indoor temperatures, leading to lower heating and cooling costs.



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