Types of Bricks in Construction: Uses, sizes and properties in Bangladesh

Different types of Bricks used in Construction

Bricks can be classified in several ways. In practical construction work, people usually identify 5 different classes of bricks based on their purpose, manufacturing process, quality grade, raw material, and sometimes weather resistance level.

Types of Bricks by Engineering purpose

Solid Bricks: Solid Bricks are the most basic bricks, typically made from clay and sand. They are used for general construction purposes and are usually red or brown.

Hollow Bricks: Hollow bricks are lightweight and have holes inside them, which reduce their weight and improve their insulation properties. They are commonly used in load-bearing walls. Hollow bricks are mainly three types-

• 3 Holes
• 6 Holes
• 10 holes

Engineering Bricks: Engineering bricks are known for their high strength and low water absorption properties. They are often used in applications where durability and load-bearing capacity are essential, such as retaining walls and foundations.

Beautification Bricks: These bricks add charm to a place. For instance, sidewalks, parks, and delightful architectural buildings use them. Clay, ceramic, calcium silicate, and concrete bricks fall into this category.

Types of Bricks by processing method

Sun-Burnt Bricks: Sun-burnt brick, also known as sun-dried brick or adobe, is a building material made from natural clay or earth that is shaped into bricks and dried in the sun. These bricks are left under the sun after molding. This method is very popular in Bangladesh.

Burnt Bricks: They are burnt in kilns and have four grades. This process results in a durable and sturdy material that is commonly used in construction for walls, pavements, and other structural elements.

Automated Machine Bricks: Automated machine bricks are manufactured using automated machinery in controlled industrial settings. This modern brick production method contrasts with traditional brick-making techniques that rely on manual labor and sun-drying processes.

Extruded Bricks: They have standard shapes and sizes. Clay and water go into a steel die to make them. These are the best solutions for limited-budget constructions.

Molded Bricks: Molded bricks, also known as pressed bricks, are a type of brick that is formed by pressing clay or other raw materials into molds under high pressure. This manufacturing process results in bricks with consistent dimensions and smooth surfaces, making them ideal for construction projects.

Dry-pressed Bricks: These are also known as simply pressed bricks. This method results in bricks with precise dimensions, sharp edges, and a smooth surface finish, making them suitable for various construction applications.

Types of Bricks by class

First-class Bricks: High strength and long-lasting are the two foremost features. Table molding gives them quality.

Second-class Bricks: Although they possess irregular shapes and textures due to ground molding, exhibit commendable durability and reliability in performance.

Third-class Bricks: Akin to unburnt bricks in strength, are primarily employed in temporary constructions due to their transient nature.

Fourth-class Bricks: Characterized by their inferior quality, are deemed unfit for significant engineering projects. Instead, they are crushed into pieces and incorporated into concrete mixtures as filler material.

Types of Bricks by raw material

Fly Ash Bricks: These bricks are made from fly ash, a byproduct of coal combustion, mixed with cement and water. They are known for their strength, durability, and eco-friendliness, making them a popular choice in sustainable construction projects.

Sand Lime Bricks: Also known as calcium silicate bricks, sand lime bricks are made from sand, lime, and water. They are highly durable and moisture resistant and often used in coastal areas or where high humidity levels are present.

Concrete Bricks: Concrete bricks are made from a mixture of cement, sand, and aggregate, which is moulded into shape and then cured under controlled conditions. They are widely used in both residential and commercial construction due to their strength, versatility, and affordability.

Ceramic Bricks: Ceramic bricks are a type of brick made from ceramic materials, typically clay, which are fired at high temperatures to produce a durable and versatile building material.

Types of Bricks by weather resistance level

Severe Weather Grade: Countries with harsh climates need them to dodge the effects of snow, blizzards, and rain. They avert freeze and thaw impacts.

Moderate Weather Grade: Tropical countries benefit from them. They can handle high temperatures.

Weather Neutral Grade: These bricks are devoid of weather-resistance features. They go into the interiors.

Standard Brick sizes in Bangladesh

Brick size matters because it affects wall thickness, mortar use, alignment, labor speed, and overall project cost. In Bangladesh, brick size can vary slightly by manufacturer, kiln, and brick type. Traditional clay bricks, auto bricks, hollow bricks, and concrete blocks do not always follow the same dimensions.

• Traditional clay or burnt brick: Usually around 9.5 × 4.5 × 2.75 inches. This is the size most often referenced in local studies and construction discussions.
• Auto brick: Often close to the traditional size, but may vary slightly. One Bangladesh study reported an average of 9.45 × 4.62 × 2.59 inches.
• Coal-burnt brick: Also close to standard market size, but not always identical. The same study reported an average size of 9.34 × 4.4 × 2.7 inches.
• Hollow and hole bricks: Their outer size can differ by manufacturer, and the number of holes changes the design and weight more than the basic market naming does. In practice, these should always be confirmed with the supplier before project estimation.

Uses of different Brick types in Bangladesh Construction

In Bangladesh, brick selection usually depends on the type of building, budget, load requirement, finishing expectation, and local availability. Different bricks are used in different parts of the same project.

• Residential buildings: Solid bricks, first-class burnt bricks, and selected machine-made bricks are common for house construction.
• Boundary walls: Solid bricks, picket bricks, and lower-cost wall bricks are often used depending on height and finish requirements.
• Partition walls: Hollow bricks and lighter masonry options are often chosen because they reduce structural load.
• Commercial projects: Machine-made bricks, engineering bricks, and more uniform brick types are preferred for consistency and faster execution.
• Decorative work: Facing bricks, ceramic bricks, and selected finished bricks are used for visual appeal.
• Temporary structures: Sun-dried or lower-grade bricks may still be used in low-cost or non-permanent works.

Important properties of Bricks

The current page already highlights durability, strength, fire resistance, and cost-effectiveness as key features of bricks, which should remain part of the revised article.

1. Strength: A good brick must be strong enough for the intended use. Structural walls need stronger bricks than non-load-bearing walls.
2. Durability: Bricks should last for years without quick damage. Better-quality bricks perform more reliably under heat, rain, and regular wear.
3. Water Absorption: Low water absorption is important because too much water intake can affect performance and finishing quality. The current page specifically notes low water absorption as a feature of engineering bricks.
4. Shape and Size Uniformity: Uniform bricks make masonry work easier. They reduce mortar waste and improve wall alignment.
5. Surface Finish: Some bricks are selected for plastered walls, while others are chosen for exposed surfaces. Smooth and uniform bricks usually give a cleaner result.
6. Fire Resistance: The current page identifies fire resistance as a key brick feature and notes that some types perform well in high-temperature applications.
7. Cost Efficiency: The current article also highlights long-term cost-effectiveness due to durability and low maintenance. In Bangladesh, brick choice often balances both purchase cost and long-term value.

Some key features of Bricks

Bricks, as a building material, possess several distinctive features that make them a preferred choice in construction. Here are some key features of bricks:

Durability: Bricks are renowned for their durability. When properly manufactured and laid, they can withstand various weather conditions, including extreme heat, cold, rain, and wind.

Strength: Bricks have excellent compressive strength, which makes them capable of bearing heavy loads. This strength is crucial for structural stability in buildings, walls, and other construction elements. A standard-size brick can withstand approximately 400,000 lbs.

Fire Resistance: Many types of bricks, such as fire bricks and engineering bricks, exhibit high resistance to fire. This property makes them ideal for use in fireplaces, chimneys, and other applications where exposure to high temperatures is expected.

Cost Effectiveness: Despite initial costs, brick's durability, longevity, and low maintenance requirements often result in long-term cost savings for property owners.

How to choose the right Brick for Construction?

Choosing the right brick is not only about price. It should depend on the purpose of the project and expected performance. Consider these points before buying:

• Type of construction
• Wall load requirement
• Exposure to moisture and weather
• Finishing requirement
• Brick size consistency
• Water absorption level
• Strength and durability
• Supplier reliability
• Transportation cost
• Local availability

Choosing the best Brick for your Construction project

There are many types of bricks used in construction in Bangladesh, and each one has its own use, size range, and performance level. Some bricks are best for structural walls, some for light partition work, and some for decorative or specialized applications. That is why understanding brick type before purchase is important for both construction quality and budget control.

FAQs about types of Bricks in Construction

Choosing the right brick becomes easier when the common questions are answered clearly. Below are some helpful FAQs about types of bricks in construction for different building works in Bangladesh.