Development of Eco-Friendly Mortars Produced with Kaolin Processing Waste: Durability Behavior Viewpoint

Alisson Mendes Rodrigues, Fabiana Pereira da Costa, Suellen Lisboa Dias Beltrão, Jucielle Veras Fernandes, Romualdo Rodrigues Menezes and Gelmires de Araújo Neves
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Alisson Mendes Rodrigues: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil
Fabiana Pereira da Costa: Graduate Program in Materials Science and Engineering (PPG-CEMat), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil
Suellen Lisboa Dias Beltrão: Graduate Program in Materials Science and Engineering (PPG-CEMat), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil
Jucielle Veras Fernandes: Graduate Program in Materials Science and Engineering (PPG-CEMat), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil
Romualdo Rodrigues Menezes: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil
Gelmires de Araújo Neves: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande, Bodocongó, Campina Grande 58429-900, Brazil

Sustainability, 2021, vol. 13, issue 20, 1-15

Abstract: This study presents the development of new eco-friendly mortar compositions containing kaolin residues (KR) and assesses their durability behavior. Firstly, the natural and calcinated kaolin residues (600 °C, 650 °C, 700 °C, 750 °C, and 800 °C) were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), granulometric analysis, and surface area. The kaolin residue calcinated at 800 °C was chosen to be added to new compositions of mortar because it presented the best pozzolanic performance. The aging tests accomplished in internal (E i ) and external (E e ) environments were applied in mortars with a mass proportion of 1:2:6 (cement + KR: lime: sand), in which the KR, calcinated at 800 °C, replaced the cement in the mass fraction of 0%, 5%, 10%, 15%, 20%, and 30%. The E i was performed for 30, 60, 90, 180, and 360 days, and the E e for 90; 210; 360; and 512 days. After the aging tests were completed, the mortar compositions containing KR were evaluated to determine their mineralogical phases (XRD), compressive strength (CS), and thermal behavior (DTA and thermogravimetry). In summary, the KR addition to the mortar compositions decreases the mechanical resistance to compression; however, mortars with a substitution of 10% and 20% presented resistance values within the minimum limit of 2.4 MPa established by ASTM C 270.

Keywords: kaolin; solid residues; pozzolanic activity; cement mortar; carbonation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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