Abstract
In this paper, an attempt has been made to investigate the possibility of using coal sludge to seal a landfill site by presenting the results of their compressibility and permeability tests. Coal sludge is a fine-grained waste from the coal enrichment process, and its permeability is also highly dependent on its degree of consolidation. The tests were carried out in a Rowe Cell, making it possible to determine the water permeability coefficient more precisely by determining the degree of the material consolidation during testing. The test was carried out using backpressure conditions. The test procedure in the Rowe Cell consisted of the following three steps: saturation, consolidation, and filtration. The coal sludge was taken directly from the filter presses as a by-product of the fines’ coal enrichment process. The paper presents the results of the individual stages performed in a Rowe Cell. The consolidation coefficient was determined using three different methods (Casagrande, Taylor, and Robbinson methods). The permeability coefficient was measured by the indirect and the direct method, the results of both were compared. The results (k < 10−9 m/s) indicated that the value of the permeability coefficient responds to the value for isolating barrier materials.
Highlights
Many studies are focusing on investigations into the properties of coal wastes, which are important for use in geoengineering applications
Research is underway on its use for the production of artificial aggregates [14], bricks [15,16], additives to other thermal processes [17], backfilling material [18], ecological mixtures that will be used for the reclamation of land degraded by industry [6,19], as well as the possibility of using ashes after burning coal sludge [20]
The aim of the paper is to investigate the permeability of coal sludge and present if coal sludge could be used as a material for isolation barriers in landfills layers
Summary
Many studies are focusing on investigations into the properties of coal wastes, which are important for use in geoengineering applications. Fine-grained waste from the coal enrichment process depends on the processing technology, flotation waste, or coal sludge (CS). These wastes are more difficult to manage than medium and coarsegrained wastes due to higher humidity (the enrichment process takes place in the aquatic environment) and, often, the content of combustible parts. Coal sludge (CS) is a material that, due to the high content of combustible parts, is most often considered in terms of its use in the power industry. The research work has mainly focused on determining the possibility of using coal sludge as a potential energy fuel as a low-energy raw material for combustion in boilers [11,12,13]. Research is underway on its use for the production of artificial aggregates [14], bricks [15,16], additives to other thermal processes [17], backfilling material [18], ecological mixtures that will be used for the reclamation of land degraded by industry [6,19], as well as the possibility of using ashes after burning coal sludge [20]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
