Life cycle carbon emissions inventory of brick masonry and light steel framing houses in Brasilia: proposal of design guidelines for low-carbon social housing

Abstract

CALDAS, L. R.; LIRA, J. S. de M. M.; MELO, P. C. de.; SPOSTO, R. M. Life cycle carbon emissions inventory of brick masonry and light steel framing houses in Brasilia: proposal of design guidelines for low-carbon social housing. Ambiente Construído, Porto Alegre, v. 17, n. 3, p. 71-85, jul./set. 2017 Abstracthis study evaluated the CO2eq emissions during the life cycle of two social housing projects in the city of Brasilia. A house of ceramic brick masonry was compared to a light steel framing one. The life cycle carbon emissions assessment (LCCO2A) with a cradle-to-grave approach was used. The relation between the thermal performance of the wall systems and CO2eq emissions in the operational phase of the houses were evaluated using the DesignBuilder software. In addition, six scenarios composed of three CO2eq emission factors from the Brazilian electrical grid and two schedules of occupation of houses (full and part time) were evaluated. The brick masonry house presented less CO2eq emissions than the light steel framing one. For both houses, the operational phase was the most significant regarding the total CO2eq emissions (50% to 70%), followed by the construction (20% to 30%), maintenance (11% to 20%) and end-of-life (lower than 1%) phases. The results also showed the importance of considering different CO2eq emission factors for the Brazilian context in the operational phase. Finally, based on the results obtained, design guidelines for low carbon social housing were proposed. Keywords T Lucas Rosse CaldasFederal University of Rio de Janeiro Rio de Janeiro -RJ -Brazil Júlia Santiago de Matos Monteiro LiraUniversity of Brasília Brasília -DF -Brazil Pedro Corrêa de MeloUniversity of Brasília Brasília -DF -Brazil Rosa Maria SpostoUniversity of Brasília Brasília -DF -BrazilRecebido em 17/11/16 Aceito em 20/03/17Ambiente Construído, Porto Alegre, v. 17, n. 3, p. 71-85, jul./set. 2017. Caldas, L. R.; Lira, J. S. de M. M.; Melo, P. C. de.; Sposto, R. M.72

Avaliação do desempenho de vedações verticais utilizando o Processo de Análise Hierárquica na tomada de decisão

“…Souza et al (2016) verificaram os impactos ambientais entre sistemas de alvenaria de blocos cerâmicos, de concreto e paredes de concreto. Caldas et al (2017b) compararam habitações de alvenaria cerâmica com uma de steel framing. Caldas et al (2017a) compararam alvenaria cerâmica estrutural com painéis de concreto.…”