|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Materials for Green Energy
||Environmental Impact of the Synthesis of Calcium Silicates (C2S AND C3S) by Combustion Processes
||Juan Restrepo, Oscar Jaime Restrepo, Jorge Iván Tobón
|On-Site Speaker (Planned)
Portland cement is obtained by a conventional synthesis process from a mixture of limestone and clay at high temperature (1450 °C). This work presents the fabrication process of pure calcium silicate phases like belite (C2S) and alite (C3S) by alternative synthesis methods, like Solution Combustion Synthesis (SCS), and the consequences in the mitigation of CO2 emissions and the energy consumption. The use of fossil fuels is the main factor in the environmental impact of the cement industry. When analyzing the emissions in the production of pure phases C3S emits 0.58 tons of CO2 per ton of cementitious materials produced and C2S emits 0.51. Additionally, to produce 1 ton of clinker consumes approximately 5.86 GJ per ton of clinker produced by wet process and 3.35 GJ per ton of clinker produced by dry process. These methods use different paths from those of solid-state processes allowing an important environmental mitigation.
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