Carbon emissions associated with two types of foundations: CP-II Portland cement-based composite vs. geopolymer concrete

• Autor(a) principal: Gomes,Kelly Cristiane
• Data de Publicação: 2019
• Outros Autores: Carvalho,Monica, Diniz,Daniel de Paula, Abrantes,Rafael de Carvalho Costa, Branco,Michel Alves, Carvalho Junior,Paulo Roberto Oliveira de
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Matéria (Rio de Janeiro. Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762019000400343
• topic: Portland Cement; Geopolymer Cement; Life Cycle Assessment; Carbon Emissions; Construction Sustainability; Coal ashes; Dry covers; Unsaturated flow; Soil columns

ABSTRACT The cement industry is the second-largest single industrial emitter in the world and therefore has an important role to play in reducing the intensity of its carbon emissions: participation of the sector is important to contribute to the goal of the Paris Climate Change Agreement to limit global warming. One of the strategies for reducing the carbon footprint of the cement industry is substitution of Portland cement, which is a component of the concrete mix widely used as a construction material worldwide. Geopolymer cement has emerged as an alternative for Portland cement, with several advantages. This study applied the Life Cycle Assessment methodology to quantify the carbon emissions associated with 1m3 of two types of concrete (concrete PC-II cement-based Portland cement vs. geopolymer concrete). Geopolymer concrete presented almost 43% less carbon emissions, while also presenting high physic-chemical performance. It was verified that geopolymer concrete has the potential to help mitigate climate change, and can be employed as part of the plan to minimize the emissions associated with the construction sector.