Despite this, a clayey formulation containing 40% fly ash with 60% clay could be a good formulation to produce clayfly ash masonry bricks. Fly ash bricks and comparison with clay bricks composition. This paper presents fly ash brick properties, manufacturing process material required for preparing the clay bricks and fly ash bricks as per indian standard code provisions, inspection and. Fly ash bricks is lighter than the conventional clay bricks as it weight around 3 to 3. To have better utilization of this fly ash as per nations policy on fly ash, trial have been made for making of bricks using fly ash, lime, gypsum and sand or quarry dust. Requirements of fly ash lime bricks as per is 12894. Indian fly ashes and alluvial, black, and red soils in. Bricks of40 or 30 mm height as weu as those made by extrusion process may not be provided with frogs.
In this study compared the fly ash clay bricks with normal clay, fly ash lime, fly ash bakas bricks table 1. The possibility of fly ash for use as building material was investigated. The flyash can also be used in combination with clay or with lime and sand to produce clayflyash bricks and flyashsandlime bricks respectively. The basic chemistry and technology based on which flyash bricks is manufactured has been successfully applied in major construction project across the globe, namely. Oct 28, 2017 varies from place to place and quality to quality. Owing to the high concentration of calcium oxide in class c fly ash, the brick is described as. The bottom ash was sieved through a 10 mm sieve and the contents passing through the sieve was used in the investigation. Wbpdcl near its plant at kolaghatover 25 million clayfly ash bricks have been produced in the country by ntpc, and other public sector undertaking as well as private bricks manufacturers. To substitute for a portion of the cement andor aggregates in. Comparative study on fly ash bricks and normal clay bricks. Engineering properties of clay bricks with use of fly ash issuu. A comparative study of fly ash bricks and normal clay bricks is summarized below in the table. Wbpdcl near its plant at kolaghatover 25 million clay fly ash bricks have been produced in the country by ntpc, and other public sector undertaking as well as private bricks manufacturers. A new approach to the production of bricks made of 100% fly ash.
Engineering properties of clay bricks with use of fly ash. It is a fine grey coloured powder having spherical glassy particles that rise with the flue gases. Fly ash brick fab is a building material, specifically masonry units, containing class c or class f fly ash and water. Department of civil engineering, north eastern regional. Aac blocks have crashed in cost and available around 2200 to 2400 per cubic meter as there are issues in locally made aac blocks. What is the cost difference between burnt clay bricks, fly. The behavior of masonry structure is dependent on the properties of its constituents such as brick units and mortar separately and together as a unified mass. The basic chemistry and technology based on which fly ash bricks is manufactured has been successfully applied in major construction project across the globe, namely. Moreover, fly ash bricks have been produced with a naturally occurring reddish colour similar to that of normal clay bricks. Table 1 classes or barnt clayflyasb bricks clause 4. Properties of fly ash and bottom ash are given in table 1. To study the structural properties of clay and fly ash brick.
Flyash bricks is lighter than the conventional clay bricks as it weight around 3 to 3. Pure fly ash and certain amount of mixing water 17. Further, it was also found that the masonry work with new technology rat trap bond in fly ash bricks have 33 % saving in cost as compared to common bricks mistry et al. Bottom ash was dried in an oven at a temperature of 110 c for three hours before use to ensure it is in dry state. Engineering properties of lightweight cellular cemented clay. Compressed at 28 mpa 272 atm and cured for 24 hours in a 66 c steam bath, then toughened with an air entrainment agent, the bricks last for more than 100 freezethaw cycles. Fly ash bricks are being produced on a large scale by the west bengal power development corporation ltd. The fly ash can be utilized to make bricks and blocks in one of several ways i. In the thermal power stations, coal is pulverized into fine powder and pumped into the boiler along with compressed air. Bureau of indian standards formulated specifications for clay fly ash bricks, lime fly ash bricks, common burnt clay bricks and calcium silicate bricks which can be referred to as regards to the quality of falg bricks. The application of fly ash bricks in various construction projects leading over traditional normal clay bricks due to its unique properties.
Performance of bricks made using fly ash and bottom ash. In this study compared the fly ash clay bricks with normal clay, fly ashlime, fly ash bakas bricks table 1. Fly ash is a heterogeneous byproduct material produced in the combustion process of coal used in power stations. To study the structural properties of clay and fly ash. A new approach to the production of bricks was carried out by using 100% lignite fly ash. Engineering properties of lightweight cellular cemented. As fly ash contains pozzolanic materials components which reach with lime to form cementatious materials. Fly ash bricks are made of waste materials that come from the combustion of coal in thermal power plants. Fly ash bricks are hitech wellimproved quality bricks used for construction of brick masonry structures.
To substitute for a portion of the cement andor aggregates in making concrete bricks and blocks. Paper on use of fly ash for brick making clayfly ash bricks. In highrise building when structural load increase, this brick has lightweight helps in reducing stress on building. International journal of research in engineering and technology. The properties and durability of clay fly ashbased fired. Resourceefficientbricks 20 has reported on the processing and technological properties of clayfly ash masonry bricks fired at c. The behavior of masonry structure is dependent on the properties of its constituents such as brick units and mortar separately and together as. Paper on use of fly ash for brick making clay fly ash bricks 1. They are used as replacement for normal clay bricks and has better properties than it. Branded aac blocks with good quality check are rarely used by bui.
Fly ash clay bricks are manufactured with clay and fly ash, at about degree c. Paper on use of fly ash for brick making clayfly ash. Fly ash bricks competitive in comparison to the conventional clay bricks and provide enormous indirect benefits. The new bricks and process have been patented and the new bricks have been given the name flashbricks. Concrete bricks are usually placed in facades, fences and provide an excellent aesthetic presence. The fly ash can also be used in combination with clay or with lime and sand to produce clay fly ash bricks and fly ash sandlime bricks respectively.