How are CLC stones made

Comparison of Red Bricks vs. AAC Blocks vs. Fly Ash Bricks vs. Solid Concrete Blocks vs. CLC Blocks

Can you please publish a comparison between the different types of bricks currently available? namely, red clay, AAC blocks, Flyash blocks, CLC blocks

Red bricks are not only among the oldest, but also among the most frequently used building materials in the world. Nevertheless, they are the most popular and leading building material, especially in developing countries, because they are cheap, durable and easy to handle and work with.

Red bricks are mainly made from clay extracted from the topsoil of the earth's surface. With continued production of red bricks, the fertile topsoil is lost and with it the land available for agriculture. Therefore, red bricks are not considered environmentally friendly.

They also emit carbon dioxide during production. Research and innovation have led to the invention of alternative wall units that are environmentally friendly. AAC blocks, fly ash bricks, solid concrete blocks, and CLC blocks are relatively new building materials that are now being used as an alternative to red bricks.

When comparing red bricks versus AAC blocks versus fly ash bricks versus solid concrete blocks versus CLC blocks, there is confusion in choosing masonry units for building a house. Here we made a comparison between red bricks, AAC blocks, fly ash bricks, solid concrete blocks, and CLC blocks to help you make the right choice.

Also read: Different shapes of brick used in construction

Courtesy - Shutterstock, Flickr, Financial Stand, Asanduff Construction

01. GENERAL

Red bricks

A red brick is a single unit of ceramic; H. Clay material used in masonry.

AAC blocks

AAC blocks are lightweight building blocks that are cut into masonry blocks or formed into larger boards and panels.

Fly ash bricks

Fly ash bricks are environmentally friendly bricks made with fly ash. They are also called dust limestone.

Solid concrete blocks

Solid concrete blocks are precast concrete parts that are mainly made from cement and fine aggregates.

CLC blocks

CLC blocks are made from cellular lightweight concrete (CLC) or foam concrete.

02. RAW MATERIALS

Red bricks

Red bricks are made by mixing clay (alumina), sand, lime, iron oxide, and magnesium oxide. Sand from locally available natural soil is used to make bricks.

AAC blocks

AAC blocks are made from the mixture of cement, lime, plaster of paris and an aerating agent. Sometimes a little fly ash is also added to the mixture.

Fly ash bricks

Fly ash bricks are made from a mixture of fly ash, cement, sand, lime and gypsum.

Solid concrete blocks

Solid concrete blocks are made from a mixture of Portland cement, water, sand and gravel. Sometimes fly ash is used as a fine aggregate.

CLC blocks

CLC blocks are made from cement, fly ash, water and a propellant.

03. APPLICATIONS

Red bricks

Red bricks are strong, tough, and durable, so they are used as a structural material in various structures such as buildings, bridges, foundations, arches and cornices, and sidewalks.

Red bricks are also used for aesthetic purposes such as facing bricks, architectural purposes, exposed practice work, and in landscaping.

AAC blocks

AAC blocks can be used to build internal and external walls of a framed structure. AAC blocks are also used in load-bearing structures.

Also read: Can we use AAC blocks in load-bearing structures?
Fly ash bricks

Fly ash bricks are strong and durable bricks that are used as an alternative to bricks. They can be used both in masonry and for other purposes that use red bricks.

Solid concrete blocks

Solid concrete blocks are used for both load-bearing and non-load-bearing walls, partitions and panel walls, as a back wall for other types of cladding material, for pillars, for retaining walls, garden walls, fireplaces and fire pits.

CLC blocks

CLC blocks are used to build walls at a low cost. They are also used for structures that require good sound insulation properties.

Also read: 10 characteristics of a good brick

04. FEATURES

a) Sizes available in the market

Red bricks

Standard module sizes are:

Standard non-modular sizes are:

These sizes are more popular in India.

AAC blocks

Standard sizes available in the market:

  • Length: 400, 500 or 600 mm.
  • Height: 200, 250 or 300 mm.
  • Width: 100, 150, 200 or 250 mm.

However, it differs from manufacturer to manufacturer.

Fly ash brick

Standard module sizes are:

  • 190x90x90 mm
  • 190x90x40 mm

Standard non-modular sizes are:

  • 230x110x70 mm
  • 230x110x30 mm

These sizes are more popular in India.

Solid concrete blocks

Standard sizes available in the market:

  • Length: 400, 500 or 600 mm.
  • Height: 200 or 100 mm.
  • Width: 50, 75, 100, 150, 200, 250 or 300 mm.

However, it differs from manufacturer to manufacturer.

CLC blocks

Standard sizes available in the market:

  • Length: 400, 500 or 600 mm.
  • Height: 200, 250 or 300 mm.
  • Width: 100, 150, 200 or 250 mm.

However, it differs from manufacturer to manufacturer.

b) Dry density

Red bricks
  • 1600 - 1920 kg / m 3 varies depending on the brick class.
AAC blocks
  • 1600 - 1920 kg / m 3 varies depending on the brick class.
Fly ash brick
  • 1700-1850 kg / m 3 varies depending on the brick class.
Solid concrete blocks
  • 1800 - 2500 kg / m 3 , varies according to the class of the blocks.
CLC blocks
  • 800 - 1800 kg / m 3 , varies according to the class of the blocks.
Also read: The Shocking Truth About The Life Of AAC Block vs. Red Bricks!

(c) compressive strength

Red bricks
  • Depending on the class of red bricks, the compressive strength is between 3.5 and 35 N / mm 2 . Although IS code offers a maximum strength of 35 N / mm 2 The maximum strength available on the market is 7.5 N / mm 2 .
AAC blocks
  • Depending on the density and quality of the blocks, the compressive strength is between 2 and 7 N / mm 2 .
Fly ash bricks
  • Depending on the class of fly ash bricks, the compressive strength is between 3.5 and 35 N / mm 2 . Although IS code offers a maximum strength of 35 N / mm 2 The maximum strength available on the market is 7.5 N / mm 2 .
Solid concrete blocks
  • Depending on the type, the compressive strength is between 4 and 5 N / mm 2 .
CLC blocks
  • Depending on the density of the blocks, the compressive strength is between 2.5 and 25 N / mm 2 .

d) water absorption

Red bricks
  • The water absorption of the brick should not be more than 20% of its weight.
AAC blocks
  • The water absorption of the AAC block should not be 10% of its weight.
Fly ash bricks
  • The water absorption of fly ash bricks should not be more than 15-20% of its weight.
Solid concrete blocks
  • The water absorption of massive concrete blocks should not be more than 10% of its weight.
CLC blocks
  • The water absorption of CLC blocks should not be more than 7.5 - 12.5% ​​of its weight.

(e) thermal conductivity

Red bricks
  • 0.6 - 1.0 W / m K. The amount of heat transfer from a particular material is called its thermal conductivity. The thermal conductivity of bricks is high and therefore the heat transfer of bricks is more than that of AAC blocks.
AAC blocks
  • 0.21 - 0.42 W / m K. Thermal conductivity of AAC block is lower than red brick and less heat transfer from block.
Fly ash bricks
  • 0.3-0.4 W / m K. Thermal conductivity of fly ash bricks is more than AAC block but less than red bricks.
Solid concrete blocks
  • 0.7 - 1.28 W / m K. The thermal conductivity of solid concrete blocks is more than red bricks.
CLC blocks
  • 0.32 - 0.54 W / m K. Thermal conductivity of CLC blocks is less than red bricks and therefore allows less.

(f) Sound isolation / noise transmission

Red bricks
  • The brick wall has good sound insulation properties due to its dense structure. 45 db tone is reduced by 150 mm and 50 db tone is reduced by 230 mm thick walls.
AAC blocks
  • The AAC block has good sound transmission property due to the presence of air pores. 40 - 45 db tone is reduced by 200 mm thick AAC block.
Fly ash bricks
  • The fly ash bricks have moderate sound insulation properties. 37 - 39 db tone is reduced by 100 mm thick bricks.
Solid concrete blocks
  • 51 db of sound is reduced by a 150 mm thick wall made of solid concrete blocks. Therefore, it has good sound insulation property.
CLC blocks
  • CLC blocks have good sound insulation properties. Depending on the density and thickness, the CLC block is reduced by 37 - 42 db.

g) Termite resistance

Red bricks
  • Red bricks are not termite resistant because they are made from clay, an organic material.
AAC blocks
  • AAC blocks are insect-resistant, inorganic and solid wall building materials. AAC block does not allow termites and pests to spread and thus increases the life of the wall.
Fly ash bricks
  • Fly ash bricks are insect resistant because they are made of inorganic materials. Therefore, they do not spread termites and pests.
Solid concrete blocks
  • The massive concrete block does not allow termites and pests to spread and thus increases the life of the wall.
CLC blocks
  • CLC stones are insect resistant and therefore do not spread termites and pests.
Also read: Make Your Termite Free With These Termite Prevention Tips!

05. EFFICIENCY

a) Mortar consumption

Red bricks
  • Requires more mortar due to irregular surfaces and more joints.
AAC blocks
  • Requires less mortar due to flat and even surfaces and fewer joints.
Fly ash bricks
  • Requires less mortar through flat and flat surfaces, but the number of joints is the same.
Solid concrete blocks
  • Requires less mortar due to flat and even surfaces and fewer joints.
CLC blocks
  • Requires less mortar due to flat and even surfaces and fewer joints.

(b) water consumption during manufacture

Red bricks
  • Requires more water to harden and thus high electricity and labor costs.
AAC blocks
  • AAC blocks are cured by steam, and block masonry also requires less curing, so less water is used and electricity is saved.
Fly ash bricks
  • Fly ash bricks are hardened by steam and therefore require less water from the manufacturers. They use water like red stones when placing it on the site.
Solid concrete blocks
  • Solid concrete blocks are hardened 7 to 14 days after pouring. Therefore, they consume a significant amount of water during manufacture.
CLC blocks
  • CLC blocks are hardened by steam and therefore the masonry also requires less hardening, so less water is used.

(c) Breakage and Use

Red bricks
  • An average of 10 to 12% or more breakage occurs on the construction site, depending on the quality of the bricks. A 100% use is therefore not possible. Even in some places, because of the poor quality of the bricks, the waste goes up to 33% when loading, uploading, etc.
AAC blocks
  • Negligible break. Almost 100% utilization is possible.
Fly ash brick
  • Negligible break. Almost 100% utilization is possible.
Solid concrete blocks
  • Negligible break. Almost 100% utilization is possible.
CLC blocks
  • Negligible break. Almost 100% utilization is possible.
Also read: Keep things in mind when buying bricks

06. ENVIRONMENTAL IMPACT

Red bricks
  • Red brick is not a green product. Red stones are made from the clay that is naturally available, but it reduces the top fertile soil cover. Therefore, the land available for agriculture is reduced.
  • More amount of CO 2 is emitted during the manufacture of red bricks.
AAC blocks
  • During the manufacturing process, the waste from the AAC block is recycled and reused. This waste is created through the cutting process.
  • Lower amount of CO 2 is emitted into the atmosphere during the manufacture of AAC blocks.
Fly ash bricks
  • Fly ash bricks use fly ash waste generated from thermal power plants. So it helps and solves disposal problems. Preservation of top soil is done as they do not use clay.
  • Very small amount of CO 2 is emitted during the manufacturing process of fly ash bricks.
Solid concrete blocks
  • Solid concrete blocks are hardened for 7 days after pouring, so they consume a significant amount of water during their manufacturing process.
  • Lower amount of CO 2 is emitted into the atmosphere during the manufacture of massive concrete blocks.
CLC blocks
  • CLC blocks also use fly ash and help break down solid waste. They also conserve top soil.
  • Very small amount of CO 2 is emitted during the manufacture of CLC blocks.

07. COSTS

Red bricks
  • They are cheaper than other bricks. However, the total cost is higher because more mortar is needed for both grouting and plastering. Extra stones must be ordered due to breakage. Environmental damage costs are beyond calculation.
AAC blocks
  • A single block is expensive, but the total cost of the masonry is low because less mortar is used. Even with the same dimensions of the walls, a smaller number of AAC blocks is required compared to red bricks. There is also more carpet area or, conversely, for the same carpet area, it reduces the built-up area. It also saves steel costs.
Fly ash bricks
  • Fly ash bricks are the cheapest brick. The total cost is more as it requires more grout.
Solid concrete blocks
  • A single block is more expensive than brick, but the total cost of masonry is low because less mortar is used. Even with the same dimensions of the walls, fewer solid concrete blocks are required compared to red bricks. They are cheaper than AAC blocks and CLC blocks.
CLC blocks
  • The individual block is more expensive, but the total cost of the masonry is low because less mortar is used. Even with the same dimensions of the walls, fewer CLC blocks are required compared to red bricks. They are cheaper compared to AAC blocks.

SPECIAL COMMENT

This comparison of Red Bricks vs. AAC Blocks vs. Fly Ash Bricks vs. Solid Concrete Blocks vs. CLC Blocks will help you make accurate choices for the walls of your home. Red Bricks are made from the natural soil. If this natural soil is continuously used for construction, the time will come when natural resources will frighten. For this reason, various alternatives such as AAC blocks, fly ash bricks, solid concrete blocks, and CLC blocks should be used to build a wall. From the above comparison of red brick versus AAC blocks versus fly ash brick versus solid concrete blocks versus CLC blocks, the user must make a judicial and reasonable choice.

Also read:

Solid Concrete Blocks Vs AAC Blocks: How To Make The Right Choice
Different types of red brick based on the manufacturing method
AAC Blocks Vs Red Bricks: How to Make the Right Choice
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