Microstructure and Durability Performance of Mortars with Volcanic Powder from Calbuco Volcano (Chile) after 4 Hardening Years
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Title: | Microstructure and Durability Performance of Mortars with Volcanic Powder from Calbuco Volcano (Chile) after 4 Hardening Years |
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Authors: | Tremiño Agulló, Rosa María | Real, Teresa | Letelier, Viviana | Ortega, José Marcos |
Research Group/s: | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura |
Center, Department or Service: | Universidad de Alicante. Departamento de Ingeniería Civil |
Keywords: | Volcanic powder | Calbuco volcano | Very long term | Microstructure | Durability |
Knowledge Area: | Ingeniería de la Construcción |
Issue Date: | 2-Apr-2021 |
Publisher: | MDPI |
Citation: | Tremiño RM, Real-Herraiz T, Letelier V, Ortega JM. Microstructure and Durability Performance of Mortars with Volcanic Powder from Calbuco Volcano (Chile) after 4 Hardening Years. Materials. 2021; 14(7):1751. https://doi.org/10.3390/ma14071751 |
Abstract: | One of the most popular ways to lessen the impact of the cement industry on the environment consists of substituting clinker by additions. The service life required for real construction elements is generally long, so it would be interesting to obtain information about the effects of new additions after a hardening period of several years. Analyzed here are the effects of the incorporation of volcanic ashes, coming from Calbuco volcano’s last eruption (Chile), as clinker replacement, in the durability and pore structure of mortars, after approximately 4 hardening years (1500 days), in comparison with reference specimens without additions. The substitution percentages of clinker by volcanic powder studied were 10% and 20%. The microstructure was characterized with mercury intrusion porosimetry and impedance spectroscopy. In order to evaluate the pozzolanic activity of the volcanic powder after 1500 days, differential thermal analyses were performed. Water absorption after immersion, steady-state diffusion coefficient and length change were also studied. In accordance with the results obtained, the 10% and 20% substitution of clinker by volcanic powder from the Calbuco volcano showed beneficial effects in the mortars after 4 years, especially regarding the microstructure and chloride diffusion, without noticeable influence in their water absorption. |
Sponsor: | This work was supported by the Conselleria de Educación, Investigación, Cultura y Deporte (at present re-named as Conselleria de Innovación, Universidades, Ciencia y Sociedad Digital) de la Generalitat Valenciana (Spain) (grant code GV/2019/070) and by the Agencia Nacional de Investigación y Desarrollo de Chile (ANID) (grant number FONDECYT REGULAR 1211135). |
URI: | http://hdl.handle.net/10045/114054 |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma14071751 |
Language: | eng |
Type: | info:eu-repo/semantics/article |
Rights: | © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
Peer Review: | si |
Publisher version: | https://doi.org/10.3390/ma14071751 |
Appears in Collections: | INV - DMCIA - Artículos de Revistas |
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Tremino_etal_2021_Materials.pdf | 408,83 kB | Adobe PDF | Open Preview | |
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