Agregado siderúrgico de escória de aciaria: potencialidades e entraves para o aproveitamento em países em desenvolvimento
Steel slag aggregate: potentialities and challenges for use in developing countries
Leonardo Dias de Abreu; Tânia Galavote; Luciana Harue Yamane; Renato Ribeiro Siman
Resumo
Em decorrência da crescente demanda mundial por agregado natural, busca-se a substituição por agregados reciclados produzidos a partir de escória siderúrgica em obras de infraestrutura pública. Entretanto, são relatadas diversas barreiras que dificultam o aproveitamento desses coprodutos e promovem a sua destinação para aterros industriais em países em desenvolvimento. Portanto, para esclarecer as principais dificuldades e entraves, foi realizada uma revisão sistematizada bibliográfica e documental. A partir disso, elaborou-se um diagrama de causa e efeito para representar as inter-relações entre os elementos identificados e a utilização do agregado de escória de aciaria. Os resultados apontam que elementos políticos e normativos, especificamente relacionados a obrigatoriedade, são preferidos e geralmente têm maior relevância em comparação aos demais, sendo os que mais influenciam sua utilização. Além disso, apresentam uma série de aspectos potencialmente positivos para a utilização de agregados alternativos. Cabe salientar, também, que esta pesquisa visa colaborar com a indicação de potencialidades e desafios para o uso de escória siderúrgica em países em desenvolvimento, contribuir para pesquisas futuras e auxiliar os tomadores de decisão na elaboração, revisão e implementação de novas políticas públicas.
Palavras-chave
Abstract
As a result of the global growing demand for natural aggregate, there is a search for a replacement for recycled aggregates produced from steel slag in public infrastructure works. However, several barriers hindering the use of this waste have been reported and promoting its destination for industrial landfills in developing countries. Therefore, a systematic bibliographic and document review was carried out to shed light on the main difficulties reported in the literature. This enabled, an attempt was made to represent, through a cause-and-effect diagram, the interrelationships between the identified elements and the use of steel slag aggregate. Political and normative elements, specifically in terms of obligation, are preferred and generally have greater relevance about the others, being the ones that have most influenced greater use, in addition to presenting a series of potentially positive aspects for the use of alternative aggregates. Moreover, this research aims to contribute to indicating the potential and challenges for the use of steel slag in developing countries, to contribute to future research, and to assist decision-makers in the elaboration, review, and implementation of new public policies
Keywords
Referências
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Submetido em:
04/12/2023
Aceito em:
06/03/2024
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