Conventional bricks are the most important construction material and used extensively throughout India. But using these bricks that are made by earth (clay) is harmful to the environment because bricks are made from clay which is good in quality and only available from agricultural fields.
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2. Structural & Foundation Analysis
3. CPM & BIM
5. Construction Technology (Career Building Course)
7. Construction Project Management
8. Building Information Modelling
11. ETABS Software
So, by using industrial waste products like fly-ash for making bricks. It gives an advantage economically and ecologically. Also, we can save the agricultural soil up to some extent. We are also utilizing the industrial waste i.e. fly-ash which is otherwise a pollutant.
Quarrying operations for producing the clay and shale are energy-intensive. It affects the landscape and produces a large amount of waste materials that rival the mountains they were created from. The brick kiln will not only consume a significant amount of raw materials but also releases a large number of greenhouse gases. Just to make matters worse, there is a shortage of clay and shale in many parts of the world and countries like China have started to limit the use of bricks made from clay and shale.
Just like using of fly ash in concrete up to the maximum of 25% replacement of Portland cement. This replacement is not only having the advantages on the cement we use but also, we can conserve the limestone for the coming generation. It is however quite suitable for the brick industry to take a similar conservative attitude.
Fly ash (a waste product from thermal Power plants)
Granulated Blast Furnace Slag (by-product recovered from the furnaces used in the production of iron)
Quarry Dust (residue taken from granite quarry)
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Alkaline Liquid (a combination of sodium hydroxide solution and sodium silicate solution)
Water (free from suspended particles)
Geopolymer bricks manufactured in this process are found to have a good strength compared to ordinary clay bricks and fly-ash bricks. Adequate curing temperature and curing time (minimum 25 hrs) can give better results. The water absorption of geopolymer brick of various mixes is found to be 15% of the weight of the brick. The presence of the salt is found to be less than 10% of the whole area. The alkaline liquid is used to form a binder between the raw materials.
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