ABSTRACT


Natural clayey soils are mostly stabilized by mixing them with certain materials, such as cement, lime, or similar products, so that they acquire the necessary properties for civil works. Some industrial waste can also be used for this purpose. Brick kiln waste is one of those. Brick industry produces large amounts of waste deposits in form of dust (powder) and it causes environmental problems.
During this study an experimental investigation was conducted to use brick kiln waste as a stabilizer in natural clayey soil existing in Nawabshah Pakistan. For this purpose. the soil samples were collected from the premises of QUEST Nawabshah. The brick kiln waste was obtained from Rehman Bricks Company, Sakrand Road and Arain Bricks Company, Airport Raod Nawabshah. Where it was produced during the process of brick burning and stocked in the form of waste deposits. The brick kiln waste was added as 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40% of the total weight of the soil.
The effectiveness of the brick kiln waste in soil as stabilizer was examined in terms of various properties of soil by conducting the different tests such as, particle size distribution, consistency limits (liquid limit and plastic limit), AASHTO classification, moisture-density relationship (Modified proctor's compaction test), shear box test and free swell ratio. The bearing capacity of all the soil samples was also calculated. All the tests were conducted for the soil without brick kiln waste and with inclusion of brick kiln waste. The encouraging results have been obtained and a significant improvement was observed in almost all the properties of soil investigated during this study with the addition of 40% of brick kiln waste in the soil. The results revealed that the brick kiln waste may be considered as potential stabilizer of relatively poor soils like clayey soil existing in the vicinity of Nawabshah.