Physical-mechanical properties of soil-cement bricks with the addition of the fine fraction from the quartzite mining ta
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REVIEW PAPER
Physical-mechanical properties of soil-cement bricks with the addition of the fine fraction from the quartzite mining tailings (State of Minas Gerais – Brazil) Fernanda Medeiros Dutra Reis 1 & Rogério Pinto Ribeiro 1 & Maria José Reis 2 Received: 12 March 2019 / Accepted: 24 February 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Several geotechnical studies have been carried out with the purpose of making tailings from quartzite mining an alternative source of raw material for different purposes in engineering works or civil construction. This study analyzed the physicalmechanical behavior of soil-cement bricks made with the addition of quartzite mining tailings from the southwest region of the State of Minas Gerais. Firstly, the geotechnical characterization of the studied samples as well as the compositions of the materials was carried out, followed by the definition of the best mixture for the production of soil-cement-quartzite tailings bricks, using a statistical analysis of variance (ANOVA). The results of the statistical analysis showed that the compressive strength (ft) of the soil-cement bricks decreased with the addition of the quartzite tailings, although they indicated the possibility of adding up to 30% quartzite tailings in the studied soil. In general, the results of the compressive strength and water absorption tests performed at 7 and 28 days of age suggest the possibility of using the quartzite tailings without compromising the physical and mechanical properties required by the Brazilian standard NBR 10833, thus indicating the potential use of this waste for the production of soilcement bricks as a viable technical solution, minimizing the environmental impacts resulting from mining activities. Keywords Environmental sustainability . Mining waste . ANOVA . Construction
Introduction Brazil is one of the world’s largest producers and exporters of dimension stones. Recent data (Chiodi Filho 2018; FEAM 2015) rank the State of Minas Gerais in second place in the ranking of these materials, representing about 21% of the national market with 1,900,000 tons produced in 2017, referring to a wide variety of rocks (granite, pegmatite, slate, foliated
* Fernanda Medeiros Dutra Reis [email protected]; [email protected] Rogério Pinto Ribeiro [email protected] Maria José Reis [email protected] 1
Department of Geotechnics, EESC, University of Sao Paulo (USP), Av. Trabalhador São Carlense, 400 - Parque Arnold Schimidt, São Carlos, SP CEP: 13566-590 Brazil
2
University of Minas Gerais State (UEMG), Dr. Juca Stockler Avenue, 1130. Belo Horizonte, Passos, MG CEP: 37900-106 Brazil
and massive quartzite, soapstone, among others). As far as foliated quartzites are concerned, Minas Gerais accounts for most of the Brazilian production of this type of rock and is found mainly in four regions of the state: São Thomé das Letras, Alpinópolis, Ouro Preto, and Diamantina (FEAM 2015; Fernandes et al. 2002), with the first two being the most representative. Th
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