Durability Behavior of Mortars Containing Perlite Tailings: Alkali–Silicate Reaction Viewpoint

Roberto Evaristo de Oliveira Neto, Juliana de Melo Cartaxo, Alisson Mendes Rodrigues, Gelmires de Araújo Neves, Romualdo Rodrigues Menezes, Fabiana Pereira da Costa and Sâmea Valensca Alves Barros
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Roberto Evaristo de Oliveira Neto: Materials Science and Engineering, Federal University of Campina Grande, Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Juliana de Melo Cartaxo: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande (UFCG), Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Alisson Mendes Rodrigues: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande (UFCG), Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Gelmires de Araújo Neves: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande (UFCG), Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Romualdo Rodrigues Menezes: Laboratory of Materials Technology (LTM), Department of Materials Engineering, Federal University of Campina Grande (UFCG), Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Fabiana Pereira da Costa: Materials Science and Engineering, Federal University of Campina Grande, Av. Aprígio Veloso-882, Bodocongó, Campina Grande 58429-900, PB, Brazil
Sâmea Valensca Alves Barros: Engineering Department, Universidade Federal Rural de Semi-Árido, Rua Gamaliel Martins Bezerra, Alto da Alegria, Angicos 59515-000, RN, Brazil

Sustainability, 2021, vol. 13, issue 16, 1-8

Abstract: Tailing incorporation into mortars has been the subject of much research in recent years. Despite this, most of these studies did not investigate the harmful effects resulting from the exposure of such mortars to an environment containing aggressive agents. This work investigated the effects of perlite tailing addition into mortars containing cement CP V-ARI MAX and hydrated lime. The raw materials were subjected to chemical characterization (X-ray fluorescence (XRF)) and mineralogical (X-ray diffraction (XRD)), while the samples immersed in 1 N NaOH solution were characterized by XRD, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and compression strength (CS). The results showed the harmful effects of incorporating perlite tailings into the mortar investigated. Such a degradation was proven by linear expansion and compressive strength experiments accomplished in the samples after the test of resistance to an alkali–silicate reaction.

Keywords: perlite tailings; aggregate; alkali–silicate reaction (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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