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

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 perl...

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Bibliographic Details
Published in:Sustainability 2021-08, Vol.13 (16), p.9203
Main Authors: Neto, Roberto Evaristo de Oliveira, Cartaxo, Juliana de Melo, Rodrigues, Alisson Mendes, Neves, Gelmires de Araújo, Menezes, Romualdo Rodrigues, da Costa, Fabiana Pereira, Barros, Sâmea Valensca Alves
Format: Article
Language:English
Subjects:
Aggregates
Alkali resistance tests
Alkali-aggregate reactions
Building materials
Cement hydration
Composition
Compression
Compressive strength
Durability
Dynamic testing
Fluorescence
Mechanical properties
Methods
Mine tailings
Mineralogy
Minerals
Mortar
Perlite
Raw materials
Reagents
Scanning electron microscopy
Service life
Silica
Sodium hydroxide
Tailings
Testing
Thermogravimetric analysis
X-ray diffraction
X-ray fluorescence
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Summary: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.
ISSN:2071-1050
2071-1050
DOI:10.3390/su13169203