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Location
Lexington, Kentucky
Start Date
6-5-2026 9:00 AM
End Date
6-5-2026 9:30 AM
Description
High-calcium coal ashes, traditionally considered challenging for use in blended cements, offer unique opportunities for the development of carbon-negative supplementary cementitious materials (SCMs). This study explores innovative processing and carbonation strategies to transform high-calcium ashes into reactive binders that not only reduce clinker demand but also permanently sequester CO2. Through multiple optimized and enhanced carbon mineralization pathways, the treated ashes exhibit enhanced pozzolanic performance, durability, and compatibility with Portland cement systems. Life-cycle analysis confirms that the dual benefits of CO2 capture and clinker displacement yield a net carbon-negative profile, advancing both decarbonization of cement production and sustainable coal ash management.
Document Type
Presentation
Archival?
Archival
Included in
Energy Systems Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Mining Engineering Commons, Oil, Gas, and Energy Commons, Structural Materials Commons, Sustainability Commons
Carbon-negative supplementary cementitious materials produced from high-calcium coal ashes
Lexington, Kentucky
High-calcium coal ashes, traditionally considered challenging for use in blended cements, offer unique opportunities for the development of carbon-negative supplementary cementitious materials (SCMs). This study explores innovative processing and carbonation strategies to transform high-calcium ashes into reactive binders that not only reduce clinker demand but also permanently sequester CO2. Through multiple optimized and enhanced carbon mineralization pathways, the treated ashes exhibit enhanced pozzolanic performance, durability, and compatibility with Portland cement systems. Life-cycle analysis confirms that the dual benefits of CO2 capture and clinker displacement yield a net carbon-negative profile, advancing both decarbonization of cement production and sustainable coal ash management.
