Statistical Design of Eco-Friendly Mortar Mixtures Containing Scheelite Tailings and Quartzite Sand: Evaluation of Resistance to Alkali-Aggregate Reaction

Thainara de Lima Arruda, Fabiana Pereira da Costa, Rebeca Cavalcante Diniz, Alisson Mendes Rodrigues (), Romualdo Rodrigues Menezes and Gelmires de Araújo Neves
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Thainara de Lima Arruda: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG—CEMat), Universidade Federal de Campina Grande (UFCG), Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Fabiana Pereira da Costa: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG—CEMat), Universidade Federal de Campina Grande (UFCG), Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Rebeca Cavalcante Diniz: Unidade Acadêmica de Engenharia Civil, Centro de Ciência e Tecnologia, Universidade Federal de Campina Grande, Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Alisson Mendes Rodrigues: Programa de Pós-Graduação em Ciência de Materiais (PPGCIMA), Faculdade UnB Planaltina, Universidade de Brasília (UNB), Brasília 70904-910, DF, Brazil
Romualdo Rodrigues Menezes: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG—CEMat), Universidade Federal de Campina Grande (UFCG), Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil
Gelmires de Araújo Neves: Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPG—CEMat), Universidade Federal de Campina Grande (UFCG), Av. Aprígio Veloso-882, Campina Grande 58429-900, PB, Brazil

Sustainability, 2023, vol. 15, issue 15, 1-16

Abstract: This study focuses on addressing the challenge of society’s consumer demands through sustainable production processes, as outlined by Sustainable Development Goal 12 established by the United Nations. In this context, this study aims to assess the durability of eco-friendly mortars with mineral waste as alternative raw materials, considering the alkali-aggregate reaction (AAR). For this purpose, scheelite tailing (ST) was used to partially replace Portland cement (PC), and quartzite sand (QS) was used to fully replace conventional sand. The ST was ground and sieved (<75 μm), and part of it was used in its natural form, while the other part was calcined (1000 °C for 1 h). A mixture experimental design was created to select the compositions with the best mechanical performance. All the mortar mixtures were produced with a cementitious material to QS ratio of 1:3. Three mortar compositions (0% ST, 30% natural ST, and 30% calcined ST) were selected to study the resistance to the AAR. Linear expansion measurements, compressive strength tests, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy were conducted to evaluate the phases formed and the mechanical behavior of the mortars in relation to the AAR. The expansion results demonstrated that QS does not exhibit deleterious potential. Regarding the use of ST, the results indicated that it is possible to partially replace PC with calcined ST without significantly compromising the mechanical performance and durability of the mortars. However, the use of non-calcined ST is not recommended, as it presents deleterious effects on the mechanical properties of the mortars. This study highlights a new sustainable mortar alternative for use in construction without future degradation of its properties.

Keywords: scheelite tailings; quartzite sand; eco-friendly mortars; durability; sustainability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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