Fly Ash Bricks

Fly ash Bricks

Now days, when the cost of construction has increased due to high rate of cement, steel, bricks and all type of construction materials, one can reduce the cost upto a certain extent by using Fly Ash Bricks instead of traditional Clay Bricks. However there are several myths regarding the suitability and strength of Fly Ash Bricks, therefore in this article we have tried to give you all the information about the Fly Ash Bricks.

What is Fly Ash Brick? Fly ash Fly ash Bricksbrick is a brick made by using Fly ash of class ‘C’, Sand/Stone Dust, Lime, and Gypsum in appropriate proportions mixed in water. Ordinary Portland Cement can also be used in place of Lime and Gypsum. Owing to the high concentration of Calcium Oxide in class ‘C’ fly ash, the brick is described as “self-cementing”.


  1. Size                             : Machine Made Modular size 20 cm x 10 cm x 10 cm
  2. Weight                         : 2.5 Kg to 3 Kg.
  3. Compressive strength : 100 to 120 Kg/cm2
  4. Water absorption         : 15 to 20%

It’s a proven fact that Fly ash bricks which is made with following the BIS standards in India are 100 % reliable and long lasting than normal red clay bricks of any other conventional building material.

Fly ash brick

Advantages of using Fly Ash Bricks:

  1. Fly ash bricks are light weight material compared to clay bricks, so it is suitable for multi storey buildings, less weight means less stress on building, hence safety assured.
  2. Fly ash bricks absorb less heat than normal bricks, therefore it keeps your building cool even in summer, hence most suitable for Indian conditions.
  3. Due to its uniform and even shape, less mortar is required in construction. Also plastering can be avoided if used for compound wall or godowns.
  4. Plaster of Paris can be applied directly without a backing coat of plaster
  5. The compressive strength of Fly ash bricks are high compared to normal bricks, Therefore, less wastage occur during transportation.
  6. Fly ash bricks are less porous, therefore they absorb very little water, whereas burnt clay bricks absorbs more water during construction. Thus Fly ash bricks save money on water during construction and even keep your building strong during rainy seasons.

Also read Comparison between Fly ash bricks and Clay bricks.

If you liked this article then please like us on Facebook or follow us Twitter or Google+.


  1. Hi Admin,

    My self Anu Mohandas and I am from New Delhi.

    I would be very much grateful and obliged if you can help me out with some suggestions with the construction of a house at a corner plot with the specification’s of 20.7 x 27.3 feet (Ground Floor) and 23.7 x 30.3 feet (first floor onward’s including the balcony area). We are planning to construct the house with parking for one small car along with 1BHK at Ground Level and from First Floor onward’s 2BHK with dining area and balcony. I would like to know what materials like Cement, Bricks, Iron etc. should I use for the construction of my house in terms of durability, strength and heat resistance quality etc. etc.

    In overall, I am a layman so I would like to know each and everything about the construction of a house, as you can understand that construction of a house is done only once in a lifetime for a middle class person like me.

    Would be much appreciate your valuable suggestion and comments to go ahead with my planning of building a house and will be much obliged for the same.

    Thanks & looking forward to a positive response to my request.

    Best regards
    Anu Mohandas

    • Hi Anu,

      Its nice to learn that you are planning to construct your own house. There are lots of articles regarding the queries you made , which will help in construction of your dream home. For example, for material specification you can read articles under “Buying Tips” category. Similarly under “Construction Guide” category you can read articles regarding construction works of individual activities like Foundation, Brickwork, Plastering, Storage of materials etc.

      For any further queries feel free to write us at



  2. Superb article that states the very essence of firm foundation! Being a civil engineer, after years, I finally made my own house in my hometown a year ago. I used fly ash bricks along with Roff Supercrete as mortar and only not even a single crack has developed over the period of time, despite heavy temperature variations. Bricks do play the most important role and so does soil density calculation which ensures your foundation is perfectly laid and the soil is well set. Hence, one has to take care of all the factors including proper mortaring.

  3. Very interesting article, I am right now in the process of constructing a house and brick work will commence in a few weeks time. I am looking for alternate means for reducing the house construction cost especially replacing traditionally used burnt clay bricks with other materials such as GFRG panels, fly ask bricks etc. Could you please help me in deciding the material which I need to use for construction and also regarding dealer contacts or approx pricing of fly ash bricks .I am constructing house in trivandrum.


  5. For working with Fly Ash bricks, masons does not need any special skills. Its just as easy to use as Clay bricks are used.

    Since now a days, availability of clay is becoming hard and hence, the cost of Clay bricks are rising. Therefore, Fly Ash bricks can also be used for cost effective construction. However, you have to compare yourself the cost of both bricks in your region.

    We are sorry to say that we don’t have any information regarding the availability of Fly Ash bricks in Bangalore. Therefore, we would suggest you to either conduct a survey in your region or you may also search in the internet for the same.

  6. Dear Sir/Madam,

    I would want to know where I could get flyash bricks in Bangalore.

    Hasthe mason needs special skills.

    Is the costing of bricks more than clay bricks.

    Please clarify on these points.

    Thanks and regards, Vijay

Leave a Reply

Your email address will not be published.