Natural Fluorite from Órgiva Deposit (Spain). A Study of Its Pozzolanic and Mechanical Properties

Martín Sánchez, Domingo Alfonso ORCID: https://orcid.org/0000-0002-3179-2245, Costafreda Mustelier, Jorge Luis ORCID: https://orcid.org/0000-0002-5125-4575, Estévez Fernández, Esteban, Presa Madrigal, Leticia ORCID: https://orcid.org/0000-0002-4165-0611, Calvo Paz, Alicia, Castedo Ruiz, Ricardo ORCID: https://orcid.org/0000-0002-5725-6272, Sanjuán, Miguel Ángel, Parra y Alfaro, José Luis ORCID: https://orcid.org/0000-0002-6979-5986 and Navarro, Rafael (2021). Natural Fluorite from Órgiva Deposit (Spain). A Study of Its Pozzolanic and Mechanical Properties. "Crystals", v. 11 (n. 11); p. 1367. ISSN 2073-4352. https://doi.org/10.3390/cryst11111367.

Description

Title: Natural Fluorite from Órgiva Deposit (Spain). A Study of Its Pozzolanic and Mechanical Properties
Author/s:
Item Type: Article
Título de Revista/Publicación: Crystals
Date: 10 November 2021
ISSN: 2073-4352
Volume: 11
Subjects:
Freetext Keywords: Fluorite; cement; pozzolan; mortar; mechanical strength; reduction of CO2 emissions
Faculty: E.T.S.I. de Minas y Energía (UPM)
Department: Ingeniería Geológica y Minera
Creative Commons Licenses: None

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Abstract

This work presents the results of the partial substitution of Portland cement (PC) by natural fluorite (NF) and calcined fluorite (CF) in mortars, at 10%, 25% and 40%. To meet these objectives, a sample of fluorite was initially studied by XRD, SEM and Raman Spectroscopy (RS). A chemical quality analysis (CQA) and a chemical pozzolanicity test (CPT) at 8 and 15 days were carried out in a second stage to establish the pozzolanic properties of the investigated sample. Finally, a mechanical compressive strength test (MCST) at 7, 28 and 90 days was carried out on specimens made up with PC/NF and PC/CF mixes, at a ratio of 10%, 25% and 40%. XRD, SEM and RS results indicated fluorite as the major mineralogical phase. The CPT and CQA showed an increase in the pozzolanicity of the samples from 8 to 15 days. The MCST showed an increase in compressive strength from 7 to 90 days for both PC/NF and PC/CF specimens. The results obtained establish that fluorite produces positive effects in the mortar and contributes to the gain of mechanical strength over time, being a suitable material for the manufacture of cements with pozzolanic addition with a reduction of CO2 emissions, and by reducing the energy costs of production.

More information

Item ID: 69429
DC Identifier: https://oa.upm.es/69429/
OAI Identifier: oai:oa.upm.es:69429
DOI: 10.3390/cryst11111367
Official URL: https://www.mdpi.com/2073-4352/11/11/1367
Deposited by: Dr. Jorge Luis Costafreda Mustelier
Deposited on: 13 Jan 2022 08:19
Last Modified: 13 Jan 2022 08:19
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