A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Scenarios to Valorize Treated Spent Pot Lining in Cement and Concrete
Concrete is the most used building material around the world. Cement is the most common binder and its production requires renewable and non-renewable energy, and generates greenhouse gas emissions. The reduction of environmental impacts in the cement and concrete industries has led to a growing global concern for environmental sustainability. Supplementary cementitious materials (SCM) allow to replace the cement and the concrete, but the availability is becoming more limited. Among the supplementary cementitious materials, there is treated spent pot linings which are waste products from the production of primary aluminum or SPL (Spent Pot Lining) which is a hazardous material. However, an industrial solution has been developed to eliminate the hazardous properties of treated spent pot lined and to produce industrial and valuable products. This process is called Low-Caustic Leaching and Liming (LCL&L), the Rio Tinto plant can produce an inert material called LCLL ash from the SPL refractory materials. This inert material is composed of 60–70% SiO2 and Al2O3 and can be used as a raw material for clinker in the manufacture of cement and concrete. This study present Life Cycle Assessment (LCA) scenarios to valorize treated spent pot lining (SPL) in cement and concrete productions: first option is to landfill the treated SPL. The second option is use treated SPL as a raw material to produce clinker (high temperature process). Last and less sustainable scenario is to calcine the treated SPL through a lower temperature process (1050 °C) than clinker in order to be used as SCM.
Scenarios to Valorize Treated Spent Pot Lining in Cement and Concrete
Concrete is the most used building material around the world. Cement is the most common binder and its production requires renewable and non-renewable energy, and generates greenhouse gas emissions. The reduction of environmental impacts in the cement and concrete industries has led to a growing global concern for environmental sustainability. Supplementary cementitious materials (SCM) allow to replace the cement and the concrete, but the availability is becoming more limited. Among the supplementary cementitious materials, there is treated spent pot linings which are waste products from the production of primary aluminum or SPL (Spent Pot Lining) which is a hazardous material. However, an industrial solution has been developed to eliminate the hazardous properties of treated spent pot lined and to produce industrial and valuable products. This process is called Low-Caustic Leaching and Liming (LCL&L), the Rio Tinto plant can produce an inert material called LCLL ash from the SPL refractory materials. This inert material is composed of 60–70% SiO2 and Al2O3 and can be used as a raw material for clinker in the manufacture of cement and concrete. This study present Life Cycle Assessment (LCA) scenarios to valorize treated spent pot lining (SPL) in cement and concrete productions: first option is to landfill the treated SPL. The second option is use treated SPL as a raw material to produce clinker (high temperature process). Last and less sustainable scenario is to calcine the treated SPL through a lower temperature process (1050 °C) than clinker in order to be used as SCM.
Scenarios to Valorize Treated Spent Pot Lining in Cement and Concrete
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / el Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Camara, N. (author) / Ouellet-Plamondon, C. (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 23 ; 245-249
2022-05-18
5 pages
Article/Chapter (Book)
Electronic Resource
English
Treated spent pot lining , Supplementary cementitious materials , Life cycle analysis , Environmental impact , Cement production , Concrete , Primary aluminium production Engineering , Building Construction and Design , Geoengineering, Foundations, Hydraulics , Transportation Technology and Traffic Engineering , Environment, general
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