Influência da demolição seletiva na redução de impactos ambientais sob a óptica da avaliação do ciclo de vida
Abstract
The concern about waste generated by demolition processes has driven the search for more
sustainable methods for this practice. In Brazil, since the cancellation of ABNT NBR 5682:1977
in 2008, there has been a lack of national normative guidelines addressing the care related to
demolition processes and the disposal of generated waste. Improper disposal of construction
materials poses risks to human health and the environment due to the presence of toxic substances.
Using the concept of circular economy, selective demolition allows for the careful dismantling of
materials and construction elements, maximizing their reuse. This technique, aimed at recovering
these products through restoration or recycling processes, thereby reduces the environmental
impacts associated with this practice. This study presents a comparative analysis between a
building constructed with new materials and another constructed with inputs resulting from
selective demolition, using the Life Cycle Assessment (LCA) methodology, which evaluates the
potential environmental impacts of a product throughout its life cycle. The results of this study
indicate that the use of waste from selective demolition can result in a significant reduction in
environmental impacts. However, a specific analysis is necessary for each scope, considering
various factors, from the processes used in recovery to the quantity allowed and feasible to be
used in new products.
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