Understanding Fly Ash Bricks: Sizes, Composition, and Benefits

Fly ash bricks have gained popularity in the construction industry due to their unique properties and cost-effectiveness. These bricks are made from a mixture of fly ash, stone dust, sand, cement, and other additives, making them an environmentally friendly and financially sound choice for building projects.

Standard Sizes of Fly Ash Bricks

The typical dimensions of fly ash bricks can vary slightly based on the manufacturer or region. However, the most common sizes adhere to the following:

Standard Size

230 mm x 110 mm x 75 mm (approximately 9 in x 4.3 in x 3 in)

In addition to the standard size, fly ash bricks may also come in the following dimensions:

Modular Size

400 mm x 200 mm x 200 mm (approximately 15.75 in x 7.87 in x 7.87 in)

Half Brick Size

230 mm x 110 mm x 50 mm (approximately 9 in x 4.3 in x 2 in)

It is essential to consult local suppliers to determine the specific sizes available in your area, as variations may occur.

The Composition of Fly Ash Bricks

Fly ash bricks contain class C or class F fly ash and water as their primary ingredients. Additional components include coal dust, quicklime, water, fly ash, lime sludge, aluminium powder, and gypsum. During the manufacturing process, the bricks are compressed at a pressure of 28 MPA and then cured for 24 hours in a steam bath at 66 degrees Celsius. They are then toughened using an air entrainment agent.

Manufacturing fly ash bricks results in less environmental pollution compared to traditional methods. Additionally, the cost savings are significant, with fly ash bricks being 20% cheaper than red bricks. Moreover, the uniform shape and size of fly ash bricks reduce the cost of plaster by up to 50%.

Choosing Between Fly Ash Bricks and Regular Red Bricks

Fly ash bricks offer several advantages over regular red bricks. Here is a comparison of the pros and cons:

Pros of Fly Ash Bricks

Cost-effective Environmentally friendly Uniform shape and size Reduced pollution during manufacturing Lower cost of plaster

Cons of Fly Ash Bricks

May have slightly different physical properties compared to red bricks May require different handling and installation techniques

Available Sizes for Fly Ash Bricks

Fly ash bricks come in several sizes, which may vary depending on the specific requirements and quantity. Here are some common sizes:

400 x 200 x 200 mm (16 x 8 x 8 inches) 400 x 150 x 200 mm (16 x 6 x 8 inches) 400 x 100 x 200 mm (16 x 4 x 8 inches) 150 x 150 x 300 mm (6 x 6 x 12 inches) 150 x 230 x 300 mm (6 x 9 x 12 inches) 150 x 200 x 400 mm (6 x 8 x 16 inches) 75 x 100 x 225 mm (3 x 4 x 9 inches)

Fly ash bricks are generally available in two standard sizes:

Size 1

230 x 150 x 80 mm 230 x 150 x up to 100 mm

Size 2

230 x 110 x 75 mm 230 x 110 x 100 mm

These sizes can be adjusted based on the quantity required and the specific application of the bricks.