Use of Waste from Construction and Demolition in the Manufacture of Soil-Cement Bricks: A Sustainable Alternative

Abstract

The search for preserving the environment and avoiding the scarcity of natural resources leads civil construction to seek new technical measures tending to the sustainability of its activities, among them, the use of soil-cement bricks and construction and demolition waste (CDW), contributing to the reduction of materials discarded and costs in the works. This research aims to partially incorporate CDW in the manufacture of soil-cement bricks, with 25% and 50% of the soil mass replaced. Soil and CDW mixtures with 8%, 10% and 12% of cement were submitted to compaction tests. Soil-cement and CDW-cement bricks were submitted to dimensional analysis, water absorption tests and simple compression strength at 14 days. The results confirmed the potential of the CDW as a partial raw material for the preparation of soil-cement bricks as the results of the absorption tests achieved desired results. The brick with 25% of CDW and 12% of cement presented the best resistance to compression. The use of CDW as a construction material enables the reduction of waste-disposal areas and provides the manufacture of environmentally sustainable materials.

Performance evaluation of Cement Fly-ash Gravel piles of recycled construction and demolition waste aggregates under erosion conditions

“…Recycled aggregates from C&DW have lower strength and high water absorption compared with natural aggregates. At present, their main use is to replace natural aggregates with recycled coarse aggregates for the preparation of recycled concrete [4][5][6][7], as well as for the production of hollow blocks and permeable bricks, lightweight walls, and other multi-purpose building materials [8][9]. Recycled concrete and bricks and other products in most areas have not been matched with local standards.…”

Soil-cement bricks with insertion of scheelite-tailings: Mechanical behavior and physico-chemical evaluation of kneading water

“…In parallel, the alternative of enabling sustainable action in the manufacture of soil-cement bricks enters and questions, replacing the fine aggregate with construction and demolition waste, which significantly improve and enable the use of the material, meeting the normative prerequisites, reducing the areas of waste disposal and producing a material with environmentally friendly potential (Reis et al 2018). Rolim, Freire and Beraldo (1999), emphasize that the soil-cement constitutes one of the main elements of constructions with earth, standing out, also, for the potential of involving in its mixture diverse residues, because according to Cunha Oliveira (2020), the construction industry has great potential to be able to absorb its own wastes and the wastes of other industrial spheres.…”

Estabilização de solos tropicais com resíduos da construção civil e escória de aciaria para uso em pavimentação

“…Quando esse resíduo é adicionado a solos argilosos, ocorre um incremento do peso específico aparente seco máximo e da resistência ao cisalhamento, resultando em um material mais rígido e menos deformável (KIANIMEHR et al, 2019;. Além disso, em misturas solo-cimento, a adição de resíduos de construção contribui no ganho de resistência e melhora as características de compactação REIS et al, 2018;MOREIRA et al, 2019;.…”

“…Quando utilizados consociados com solos, um dos principais desafios quanto ao uso para execução de camadas de pavimentos consiste na heterogeneidade do RCC ou no fato do material não atender aos requisitos do projeto (BARBUDO et al, 2012;XUAN et al, 2015;CABALAR et al, 2019). Entretanto, as propriedades físicas e mecânicas da mistura solo-RCC podem ser aprimoradas via estabilização por adição de aglomerante hidráulico, onde em alguns estudos têm-se abordado o uso de misturas solo-RCC melhoradas com cimento Portland XUAN et al, 2015;REIS et al, 2018;. No entanto, esse agente de estabilização apresenta deficiências próprias, como impactos ambientais em termos de emissão de CO2, consumo de energia e custo .…”