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Ideal Brick Selection in Construction: Revealing 7 Types of Bricks & Blocks

The use of bricks as a primary construction material has a rich history dating back to ancient times. In today’s construction landscape, an array of bricks and blocks are available, brick selection among them needs guidance with each offering distinct properties, advantages, and disadvantages. This guide aims to provide an in-depth overview of seven prominent types of bricks and blocks in the Indian construction industry.

Brick Selection

1. Clay Brick:

Clay bricks, also known as burnt red bricks, have been a staple in construction for centuries. Crafted by molding wet clay, followed by drying and firing in kilns, these bricks are graded based on quality and strength.

Average Strength: 30-35 kg/cm²Wide AvailabilityErosion of Topsoil
Water Absorption: 20-25%Reliable Construction HistoryAir Pollution from Burning
Density: 1600-1700 kgs/cu.mVersatility in Aesthetic and Functional UseUneven Shape and Finish
Thermal Resistance: LowLong History of Reliable UseLabor-Intensive Production
Sound Insulation: LowVersatility for Aesthetic and Functional PurposesRelatively High On-Site Waste

2. Fly Ash Bricks:

Fly ash bricks, made from a blend of Fly ash, Stone Dust or Sand, Cement, and water, are renowned for their eco-friendly nature and precise manufacturing process.

Average Strength: 50-75 kg/cm²Uniform Shape and SizeSmaller Size, More Joints in Wall Construction
Water Absorption: 6-12%Environmental FriendlinessSmooth Finish, Reduced Bonding with Concrete
Density: 1500-1600 kgs/cu.mLarge-Scale Production with Automatic Machines
Thermal Resistance: ModerateCost-Effective (Fly ash Availability)
Sound Insulation: ModerateUtilization of Inexpensive Fly Ash

3. CLC Lightweight Bricks:

Cellular Lightweight Concrete (CLC) Bricks, also known as Foam Concrete, are created by infusing a mixture of cement, fly ash, and water with protein-based foam.

Average Strength: 35-50 kg/cm²Lightweight, Reducing Structural LoadLimitations in Large-Scale Production
Water Absorption: 6-12%Requires Less Plastering, Increasing Carpet AreaIncreased Weight with Improved Strength
Density: 850-1000 kgs/cu.mLarger Size, Reducing Joint CostsRough Finish Produced by Wire Cutting
Thermal Resistance: HighSuperior Qualities – Thermal Resistance, Sound Insulation
Sound Insulation: HighFaster Construction

4. Concrete Blocks:

Solid Concrete Blocks, a versatile option, are manufactured by blending Cement, Sand, Stone Chips, and water, catering to various applications.

Average Strength: 75-200 kg/cm²Ideal for Load-Bearing PurposesLow Thermal Resistance
Water Absorption: 6-10%Accurate Dimensions and Sharp EdgesHeavy and Challenging to Handle
Density: 1800-2400 kgs/cu.mHigh-Strength Production with Automatic MachinesRequires Precision in Handling
Thermal Resistance: LowVersatility in Construction Projects
Sound Insulation: Low

5. Hollow Blocks:

Hollow Blocks, akin to Solid Concrete Blocks in composition, introduce a hollow space inside through partitioned molds.

Average Strength: 35-45 kg/cm²Lightweight Nature, Reducing Structural LoadReduced Load-Bearing Capacity
Water Absorption: 8-10%Larger Size Blocks, Minimizing Joint RequirementsRisky for Hanging Heavy Objects
Density: 1100-1500 kgs/cu.mGood Insulation Properties – Sound, Heat, and DampnessIncreased Mortar Requirements for Construction
Thermal Resistance: Moderate
Sound Insulation: Moderate

6. FaL-G Bricks:

FaL-G blocks, a blend of Fly ash, Lime, Gypsum, water, and optional sand, emerge as an eco-friendly construction material.

Average Strength: 50-100 kg/cm²Eco-Friendly, Utilizing Fly AshSmooth Surface Hindering Plaster Bonding
Water Absorption: 8-12%Larger Size Blocks, Reducing Joint RequirementsRequires Additional Surface Preparation for Plastering
Density: 1400-1600 kgs/cu.mReduced Joint Requirements
Thermal Resistance: Moderate
Sound Insulation: Moderate

7. AAC Lightweight Bricks:

Autoclaved Aerated Concrete (AAC) bricks, a lightweight alternative, are crafted from fly ash, gypsum, lime, cement, water, and aluminum powder.

Average Strength: 30-50 kg/cm²Reduces Building Dead LoadRequires Special Jointing Paste, High Precautions
Water Absorption: 8-12%Superior Heat, Sound, and Seismic ResistanceHigh Water Absorption Leading to Cracks
Density: 650-750 kgs/cu.mLarger Size Blocks, Faster Masonry WorkBrittle Nature Requires Careful Handling
Thermal Resistance: HighEasy Handling Due to LightweightNot Suitable for Load-Bearing
Sound Insulation: HighLonger, Thinner Screws Required for Cabinets and Wall Hangings


In the complex landscape of construction materials, the significance of informed brick selection cannot be overstated. Each type of brick or block carries its unique attributes, offering a nuanced blend of strengths and limitations. The decision-making process must encompass various factors such as project requirements, environmental considerations, and the delicate balance between structural strength and operational efficiency.

Efficiency in brick selection is further heightened by the advent of advanced brick making machines. These machines play a pivotal role in modern construction, automating and streamlining the production process. Employing innovative technologies, brick-making machines ensure uniformity, precision, and increased output, contributing to both cost-effectiveness and sustainability. Integrating these machines into the decision-making process enhances the overall efficiency of brick selection, enabling construction professionals to meet diverse project demands with greater ease and speed.

As the construction industry continues to evolve, the importance of strategic brick selection becomes increasingly evident. By leveraging the diversity of available bricks and embracing cutting-edge technologies such as brick-making machines, builders and architects pave the way for structures that not only stand the test of time but also align with contemporary standards of efficiency and sustainability. In essence, the journey towards optimal brick selection is not just a choice; it is a commitment to shaping a future where construction meets the demands of both the present and the generations to come.