1 Research Scholar, Anna University of Technology, Tiruchirapalli
2 Professor & Head, Anna University of Technology, Tiruchirapalli
3 Senior Lecturer, Kamaraj Polytechnic College, Pazhavizhai
Online published on 7 February, 2013.
This experimental study is to investigate the possibility of using pond ash in varying percentage as fine aggregate substitute in cement concrete. During the combustion of pulverized coal at the thermal power station the product formed are bottom ash, fly ash and vapours. There bottom ash is that part of residue which is fused into particles and is collected at the bottom of the furnace. The distribution between bottom ash and fly ash fraction is a function of burner type, type of coal and the type of boiler bottom (wet or dry). In India most of the thermal power plants adopt wet method of ash disposal. The fly ash collected from Electrostatic precipitator and the bottom ashes are with water and disposed in a slurry form in large ponds and dykes. Fly ash acts both as a fine aggregate and as a cement. Pond ash differs from fly ash collected from Electrostatic precipitators in a dry form in that it contains significant amount of relatively coarser particles (greater than 45 μm and up to 150 μ m). The above study is to be discussed with the workability and compressive strength of concrete and is to be compared with standard concrete.
Bottom ash, fly ash, Electrostatic precipitator, pond ash, wet disposal
