Fly ash bricks mixing proportion 3 important formulas. Fly ash brick fab is a building material, specifically masonry units, containing class c or class. The utilization of fly ash bricks results in conservation of natural resources as well as protection of environment. Raw material for manufacturing of building material like clay ash bricks. Fly ash is also used as a component in the production of flowable fill. This is the widely practiced mix proportion to make quality fly ash bricks. Fly ash lime bricks are chemically bonded bricks manufactured by utilizing 80 82% of fly ash, which is a major waste byeproduct of pulverised coal fired in thermal power stations, 910% of lime, 910% of sand and 0. Pure fly ash and certain amount of mixing water 17. The textures of the bricks with fly ash were very similar to that of clay bricks.
These particles of fly ash led to a reduction in the density of the bricks and a substantial improvement in their durability. The strength of fly ash brick manufactured with the above compositions is ranges. Fly ash bricks and comparison with clay bricks composition, uses. Bricks whose solid ingredient is 100% fly ash have been manufactured.
Fly ash, lime, calcined gypsum, sand and aggregate are the raw materials required for making fly ash bricks and blocks. After this the mixture is discharged and sent to manual presses for moulding. Pdf this paper presents fly ash brick properties, manufacturing process material required for preparing the clay bricks and fly ash bricks as. Crushed bottom fuel ash or sand is also used in the composition as a coarser material to control water absorption in the final product.
Pdf fly ash is a waste material of coal firing thermal plants and its accumulation. Used as the filler mineral in asphalt road laying to fill the voids. Fly ash bricks are hitech wellimproved quality bricks used for construction of brick masonry structures. The manufacturing process uses techniques and equipment similar to those used in clay brick factories. Soils, water and environmental sciences, volcani center, aro, p. Composition of normal clay bricks and fly ash bricks. Pdf comparative study on fly ash bricks and normal clay. The bricks manufactured from fly ash possessed compressive strength higher than 40 mpa. Fly ash bricks competitive in comparison to the conventional clay bricks and provide enormous indirect benefits. They are used as replacement for normal clay bricks and has better properties than it. Benefits and risks of the agricultural uses of coal fly ash p. The raw materials of brick mix in desired proportion ash 6065% lime, 2025% and calcined gypsum 10% by weight are blended intimately in dry or wet form in a suitable blendermixer. Pdf a brief overview of fly ash brick production researchgate.223 1322 872 581 1522 722 190 1338 304 27 1381 657 1211 356 771 1249 650 780 1546 1576 156 648 1155 1558 1406 338 888 839 108 357 688 635 1238 627 112 662 602 204 205 1353 884 1203 264 557 368 662 115 60 203