Evolution of coal ash solidification properties with disposal site depth and age, 'Gacko' Thermal power plant case

Dinko Knezevic, Dragana Nisic, Sreten Beatovic, Aleksandra Tomasevic
2017 Tehnika  
Ash with high calcium content is produced by coal combusting in "Gacko" thermal power plant (Bosnia and Herzegovina). Result of controlled mixture of water and ash is spontaneous ash solidification on disposal site. Speed and solidification efficiency depends on content of calcium-oxide in ash and water: ash mass ratio, which was determined by previous research. Mass ratio that was chosen as the most suitable ratio for industrial usage (roughly) was 1:1. Samples of ash of different age were
more » ... ferent age were taken after 6.5 years of exploitation and their chemical, physical, mineralogical and geotechnical characteristics were analyzed. Disposed ash was stratified and very heterogeneous. It was shown that great impact on solidification process in practice have climate conditions, proper handling slurry processing, work continuity and disposal site preparation. Great impact of water is noticed which is, because of its water permeability filtrated into lower layers and significantly alters it characteristic.
doi:10.5937/tehnika1702195k fatcat:a2ui7u65jrcjvguuze2bonuw7m