Utilização de agregados reciclados para produção de blocos de concreto

Abstract

The growing demand for sustainable solutions in the construction industry has driven research into the reuse of waste as an alternative to the extraction of non-renewable natural resources. In this context, the production of concrete blocks with recycled inputs is a promising strategy for mitigating environmental impacts while maintaining the technical performance required for structural and non-structural applications. The general aim of this thesis was to investigate sustainable alternatives for the production of concrete blocks, focusing on the partial replacement of natural aggregates with construction and demolition waste (CDW) and lignocellulosic waste from wood widely used in construction, such as pine and eucalyptus. The research was based on a broad theoretical survey of solid waste, public policies, the classification and reuse of materials, as well as the characterization of conventional concrete blocks and those produced with alternative materials. On this basis, experimental formulations were carried out to assess the physical, thermal and mechanical effects of incorporating waste into the cement matrix. Critical analysis of the data revealed that, in controlled proportions, the use of this waste can contribute to reducing the environmental impact of the construction sector, without significantly compromising the performance of the blocks. The results highlight the technical and ecological potential of this approach, encouraging the adoption of more sustainable and circular practices in the construction production chain.