TY - GEN
T1 - Chemical stabilization of fine coal waste as an alternative to slurry impoundments
AU - Duan, Z.
AU - Honaker, R. Q.
PY - 2012
Y1 - 2012
N2 - A novel concept involving the deployment of chemical stabilization has the potential to eliminate the need of slurry impoundments and significantly reduce the release of trace elements from the high surface area fine coal waste. The process involves mixing the fine waste generated from the underflow of a thickener operation with chemical stabilization agents to tie up the water and to create a solid waste material that can be discharged directly. Portland cement, sodium silicate, F type flyash, C type flyash and hydraulic lime were evaluated as stabilizing agents. A detailed experimental study has been conducted to identify the conditions that provide the maximum compressive strength within a short curing time. Results to date show the ability to achieve compressive strengths adequate for equipment to maneuver on using a Portland cement concentration of around 10% by weight. Quick-setting concrete was not found to enhance stabilization time and compressive strength.
AB - A novel concept involving the deployment of chemical stabilization has the potential to eliminate the need of slurry impoundments and significantly reduce the release of trace elements from the high surface area fine coal waste. The process involves mixing the fine waste generated from the underflow of a thickener operation with chemical stabilization agents to tie up the water and to create a solid waste material that can be discharged directly. Portland cement, sodium silicate, F type flyash, C type flyash and hydraulic lime were evaluated as stabilizing agents. A detailed experimental study has been conducted to identify the conditions that provide the maximum compressive strength within a short curing time. Results to date show the ability to achieve compressive strengths adequate for equipment to maneuver on using a Portland cement concentration of around 10% by weight. Quick-setting concrete was not found to enhance stabilization time and compressive strength.
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UR - http://www.scopus.com/inward/citedby.url?scp=84866051912&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84866051912
SN - 9781622760893
T3 - 2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints
SP - 695
EP - 699
BT - 2012 SME Annual Meeting and Exhibit 2012, SME 2012, Meeting Preprints
T2 - 2012 SME Annual Meeting and Exhibit 2012, SME 2012
Y2 - 19 February 2012 through 22 February 2012
ER -