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Meeting MS&T21: Materials Science & Technology
Symposium Journal of the American Ceramic Society Awards Symposium
Presentation Title A Thermodynamics-guided Framework to Design Spherical Lightweight Aggregate from Waste Coal Combustion Ash
Author(s) Mohammad Balapour, Thiha Thway, Rathin Rao, Newell Moser, Edward J Garboczi, Yick G. Hsuan, Sabrina Spatari, Yaghoob Farnam
On-Site Speaker (Planned) Mohammad Balapour
Abstract Scope Using a thermodynamics-based framework, the process to successfully manufacture synthetic lightweight aggregate (LWA) from waste coal combustion ash through sintering was investigated in which a delicate balance among three phenomena was required: (i) sufficient liquid phase formation during sintering, (ii) appropriate viscosity for the liquid-solid phase, and (iii) sufficient gas emission amount to form pores in the LWA. Using thermodynamics modeling, the liquid phase formation during sintering was quantified, where its correlation to X-ray computed tomography observations indicated that a minimum of 35 % by mass liquid phase content is necessary for gas-filled pores formation in LWA. The Browning and Krieger-Dougherty models were used to quantify the liquid and liquid-solid phases viscosity, respectively. A lower bound of 100 PaS for the viscosity was found to ensure the spherical shape of the LWA. Thermogravimetric analysis showed a considerable gas release potential for the LWA, creating gas-filled pores in the LWA.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Novel Strategy to Strengthen Alumina-carbon Refractories for Flow Control of Molten Steel
A Thermodynamics-guided Framework to Design Spherical Lightweight Aggregate from Waste Coal Combustion Ash
Direct Ink Writing (DIW) of Hierarchical Porous Alumina Stabilized Emulsions: Rheology and Printability
Domain Walls in Ferroelectrics
Effect of Moisture on the Oxidation Behaviour of ZrB2.
In-Situ Resistance Degradation & Switching of Bulk YSZ & STO Single Crystals
Processing of MAX Phases: From Synthesis to Applications
Relaxor Characteristics and Electromechanical Response under High Field for Sodium BismuthTtitanate-based Ceramics

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