Per: RITA DE KASSIA GONCALVES PEREIRA (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF), Samuel Araújo Azevedo Malafaia (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF), Iully da Silva Amaral Pereira (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF), Juliana Fadini Natalli (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF), Afonso Rangel Garcez de Azevedo (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF), Markssuel Teixeira Marvila (UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO - UENF)
Abstract:
In recent years, concern for the environment and the search for sustainable
alternatives have intensified, especially in the construction sector, historically
associated with high CO2 emissions. In this context, the partial replacement of
Portland cement with biochar, a material obtained through the pyrolysis of sawdust,
emerges as a promising solution. In addition to reducing the carbon footprint, the use
of biochar offers benefits such as waste recycling and potential improvements in
construction. This study explores the effects of incorporating biochar processed at
500°C into rendering mortars, evaluating their physical and chemical properties.
Laboratory tests were conducted with different concentrations of biochar (0.5% and
1%) replacing Portland cement in mortars with a ratio of 1:1:6 (cement, lime, and
* Contribuição técnica ao 77º Congresso Anual da ABM – Internacional, parte integrante
da ABM Week 8ª edição, realizada de 03 a 05 de setembro de 2024, São Paulo, SP, Brasil.
sand). Fresh state analyses included consistency index, bulk density, incorporated air
content, and water retention, categorizing in detail the properties crucial for civil
engineering. The use of biochar in the mortars caused significant changes, such as
increased incorporated air content, variations in water retention, and increased bulk
density. These results suggest potential for improved performance in terms of strength
and durability, but highlight the need for further investigations to fully understand the
impact of biochar.
