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Characterization and effect of mechanical and thermal activation in mining tailings for use as supplementary cementitious material AITranslate

S.M. HernándezRamos; D.L. TrejoArroyo; D.F. CholicoGonzález; G.M. RodríguezTorres; J. ZárateMedina; R.E. VegaAzamar; C.A. LeónPatiño; N. OrtízLara;
Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigación en Metalurgia y Materiales. Ed.“U”;CONAHCYT-Tecnológico Nacional de México. Instituto Tecnológico de Chetumal., Av. Insurgentes 330;Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigación en Metalurgia y Materiales. Ed.“U”;Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigaciones en Ciencias de la Tierra. Ciudad Universitaria;Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigación en Metalurgia y Materiales. Ed.“U”;Tecnológico Nacional de México. Instituto Tecnológico de Chetumal, Av. Insurgentes 330;Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigación en Metalurgia y Materiales. Ed.“U”;CONAHCYT-Universidad Michoacana de San Nicolás de Hidalgo. Instituto de Investigación en Metalurgia y Materiales. Ed.“U”
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Publisher: Elsevier
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Abstract AITranslate

The objective of this work is to evaluate the potential use of gold and silver tailings (GST) as Supplementary Cementitious Material (SCM). Physical, chemical, and mineralogical characteristics of GST were evaluated. Based on the initial characterization of GST, mechanical and thermal activation were proposed to improve GST reactivity. The effect of both activation processes in crystallite size and Full Width at Half Maximum (FWHM) were determined by X-Ray Diffraction (XRD). Mechanical activation at 140 min of milling and thermal activation at 1000 °C allowed the most significant reduction of crystallite size and particle size. The unconfined compressive strength (UCS) and the Strength Activity Index (SAI) were tested in mortar cubes partially substituted with activated tailings. Results showed that 10, 15, and 20 wt% substitution with activated tailings exceed the 75% SAI according to ASTM standards. Micrographs showed the presence of a calcium silicate hydrate (C-S-H) gel rich matrix in experimental mortars.

KeyWords AITranslate

GoldSilver Tailings Supplementary Cementitious Material Thermal activation Mechanical activation Strength Activity Index
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Basic Information:

DOI：https://doi.org/10.1016/j.cscm.2023.e02770

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Citation Information:

The objective of this work is to evaluate the potential use of gold and silver tailings (GST) as Supplementary Cementitious Material (SCM). Physical, chemical, and mineralogical characteristics of GST were evaluated. Based on the initial characterization of GST, mechanical and thermal activation were proposed to improve GST reactivity. The effect of both activation processes in crystallite size and Full Width at Half Maximum (FWHM) were determined by X-Ray Diffraction (XRD). Mechanical activation at 140 min of milling and thermal activation at 1000 °C allowed the most significant reduction of crystallite size and particle size. The unconfined compressive strength (UCS) and the Strength Activity Index (SAI) were tested in mortar cubes partially substituted with activated tailings. Results showed that 10, 15, and 20 wt% substitution with activated tailings exceed the 75% SAI according to ASTM standards. Micrographs showed the presence of a calcium silicate hydrate (C-S-H) gel rich matrix in experimental mortars.

quote

GB/T 7714-2015 [1] S.M. HernándezRamos, D.L. TrejoArroyo, D.F. CholicoGonzález, et al. Case Studies in Construction Materials, 2024(20). DOI:10.1016/j.cscm.2023.e02770.
MLA [1] S.M. HernándezRamos, et al., Case Studies in Construction Materials, no. 20, 2024, https://doi.org/10.1016/j.cscm.2023.e02770.
APA [1] S.M. HernándezRamos, D.L. TrejoArroyo, D.F. CholicoGonzález, G.M. RodríguezTorres, J. ZárateMedina, R.E. VegaAzamar, C.A. LeónPatiño, & N. OrtízLara. (2024). Case Studies in Construction Materials(20). https://doi.org/10.1016/j.cscm.2023.e02770
IEEE [1] S.M. HernándezRamos, D.L. TrejoArroyo, D.F. CholicoGonzález, G.M. RodríguezTorres, J. ZárateMedina, R.E. VegaAzamar, C.A. LeónPatiño, and N. OrtízLara, Case Studies in Construction Materials, no. 20, 2024, doi: 10.1016/j.cscm.2023.e02770. keywords: {GoldSilver Tailings;Supplementary Cementitious Material;Thermal activation;Mechanical activation;Strength Activity Index}