New Deposit of Mordenite–Clinoptilolite in the Eastern Region of Cuba: Uses as Pozzolans

Costafreda Mustelier, Jorge Luis and Martín Sánchez, Domingo Alfonso (2021). New Deposit of Mordenite–Clinoptilolite in the Eastern Region of Cuba: Uses as Pozzolans. "Molecules", v. 26 (n. 15); p. 4676. ISSN 1420-3049. https://doi.org/10.3390/ molecules26154676.

Description

Title: New Deposit of Mordenite–Clinoptilolite in the Eastern Region of Cuba: Uses as Pozzolans
Author/s:
  • Costafreda Mustelier, Jorge Luis
  • Martín Sánchez, Domingo Alfonso
Item Type: Article
Título de Revista/Publicación: Molecules
Date: 2 August 2021
ISSN: 1420-3049
Volume: 26
Subjects:
Freetext Keywords: Mordenite–clinoptilolite; smectite; altered volcanic glass; pozzolanic reactivity
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 describes the newly discovered zeolites in the eastern region of Cuba. In the researched area, there have been no previous studies of natural zeolite exploration. Therefore, the results shown here are new. The main object of this research is to analyse five samples of zeolites and demonstrate their pozzolanic capacity and the possibility of their usage in the industrial manufacturing of pozzolanic cements. The study of the samples was performed by X-ray diffraction (XRD), X-ray fluorescence (XRF) and scanning electron microscopy (SEM). A chemical analysis (CAQ) to determine the quality of the samples as pozzolans was performed, by determining the total SiO2, reactive SiO2, total CaO, reactive CaO, Al2O3, MgO and the insoluble residue (I.R.). Lastly, an eight-day pozzolanicity analysis (PA) was carried out to determine the pozzolanic reactivity of the samples. The results obtained by XRD, XRF and SEM established that the researched zeolite samples have two main zeolitic phases: mordenite and clinoptilolite. Altered volcanic glass, quartz and smectite (montmorillonite) are the secondary phases. The results of the chemical quality analysis (CAQ) showed that the samples contain a considerable amount of reactive SiO2 and reactive CaO, as well as a low content of insoluble residue, which reinforces their properties as pozzolans. The results of the pozzolanicity analysis (PA) concluded that the analysed samples actively react with Ca(OH)2 after eight days. Based on all the results mentioned above, it is established that both mordenite and clinoptilolite behave like pozzolans and can be recommended for the manufacture of pozzolanic cements, which have more effective properties than Portland cement, in terms of physical, chemical and mechanical strength, low heat of hydration, resistance to sulphates, low CO2 emissions to the atmosphere and negligible impacts on the environment.

Funding Projects

TypeCodeAcronymLeaderTitle
Universidad Politécnica de MadridAL15-PDI-32UnspecifiedUnspecifiedUnspecified
Universidad Politécnica de MadridAL16-PDI-11UnspecifiedUnspecifiedUnspecified

More information

Item ID: 69426
DC Identifier: https://oa.upm.es/69426/
OAI Identifier: oai:oa.upm.es:69426
DOI: 10.3390/ molecules26154676
Official URL: https://www.mdpi.com/1420-3049/26/15/4676
Deposited by: Jorge Luis Costafreda Mustelier
Deposited on: 13 Jan 2022 08:30
Last Modified: 13 Jan 2022 08:30
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