Uncertainty sources in the life cycle assessment of construction products in Brazil
TypeCommunications sans actes
Uncertainty estimation is an important part of Life Cycle Assessment (LCA), especially when comparing product alternatives. This work presents a study carried out for nine construction products in Brazil, with the aim of estimating the uncertainty of the Global Warming Potential (GWP) indicator and its main uncertainty sources. Product Life Cycle Inventories (LCIs) were developed based on national data for the product manufacturing processes, which were collected from local manufacturers and/or from literature, and upstream and downstream processes were modelled using datasets from Ecoinvent v. 3.2. GWP was calculated using the IPCC 2013 method with 100 years’ timeframe and its coefficient of variation (CV) was estimated using the Monte Carlo sampling available in Simapro v. 8.2, with 10.000 interactions. Afterwards ANOVA was conducted for each product, in order to identify the distribution of the CV between the process itself and upstream and downstream processes. The ANOVA also allowed to identify the process that most contributed to the final uncertainty. GWP CVs were on average 16%. For seven products, upstream and downstream processes contributed most to the uncertainty (79% of CV on average); while for two products (wood based) the process itself was prevalent (82% of CV on average). The upstream processes that most contributed to the uncertainty (and also to the GWP indicator) were electricity production, diesel combustion, cement production and acrylic binder production. It can be concluded that upstream processes are a major uncertainty source in the LCA of construction products, and reinforces the importance of a national database for increasing LCA reliability.
Showing items related by title, author, creator and subject.
Adaptation of life-cycle inventories of sawn timber used in the structure of roofs in the state of São Paulo SOUZA, Carolina A; PIGOZZO, Raphael J. B.; SILVA, Fernanda B; HORTA ARDUIN, Rachel; OLIVEIRA, Luciana A; TEIXEIRA, Claudia Echevenga (Instituto Brasileiro de Informação em Ciência e Tecnologia, 2017)Este trabalho teve como objetivo desenvolver o inventário de ciclo de vida para madeira empregada na estrutura de telhado de edificações populares do Estado de São Paulo, com base na adaptação de inventários existentes na ...
Comparative analysis of procedures for the estimation of uncertainties in LCA: clay brick case study SILVA, Fernanda Belezario; YOSHIDA, Olga Satomi; HORTA ARDUIN, Rachel; VINHAL, Lais D; TEIXEIRA, Claudia Echevenga; OLIVEIRA, Luciana A (Instituto Brasileiro de Informação em Ciência e Tecnologia, 2017)O presente trabalho tem como objetivo discutir a estimativa de incertezas em ACV, utilizando três procedimentos de cálculo a partir de dados de inventários da produção de blocos cerâmicos de uma fábrica localizada no Estado ...
SILVA, Fernanda B.; ARDUIN, Rachel Horta; DIESTELKAMP, Elisabeth; TEIXEIRA, Claudia Echevenga; OLIVEIRA, Luciana A (2017)This work presents a study of six construction products: sand, gravel, clay block, concrete block, ready-mix concrete and mortar. National LCIs were developed using primary data collected at manufacturers located in the ...
ARDUIN, Rachel Horta; CHARBUILLET, Carole; BERTHOUD, Françoise; PERRY, Nicolas (CISA Publisher, Italy, 2017)This work presents a case study for a tablet treated in France. The objective was to assess the impacts of the end-of-life stage and its influence in the final results when considering different waste management scenarios. ...
ARDUIN, Rachel Horta; CHARBUILLET, Carole; BERTHOUD, Françoise; PERRY, Nicolas (IEEE, 2016)In France is estimated a generation of about 17 and 23 kg per year of Waste Electrical and Electronic Equipment (WEEE) per inhabitant, however, in 2014, the return rate for household WEEE hardly reaches 38% of the total ...