Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid

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Title: Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid
Authors: Ortega, José Marcos | García Vera, Victoria Eugenia | Solak, Afonso M. | Tenza-Abril, Antonio José
Research Group/s: Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura | Tecnología de Materiales y Territorio (TECMATER)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Microstructure | Durability | Acid rain | Zinc stearate | Ethyl silicate | Nanosilica
Knowledge Area: Ingeniería de la Construcción
Issue Date: 5-Dec-2019
Publisher: MDPI
Citation: Ortega JM, García-Vera VE, Solak AM, Tenza-Abril AJ. Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid. Applied Sciences. 2019; 9(24):5297. doi:10.3390/app9245297
Abstract: Acid attack causes the deterioration of construction material surfaces. The objective of this study was to investigate the degradation of different types of cement mortar in terms of variations in pore size distribution obtained by mercury intrusion porosimetry (MIP), mass loss, and compressive strength. The mortars were manufactured with nanosilica, zinc stearate, and an ethyl silicate coating. After curing (28 days), the samples were subjected to acid exposure for 90 days, immersed ina solution (3% w/w) of sulphuric acid (H2SO4). The results indicate that the mortars showed a more refined microstructure, with a higher proportion of smaller pores (<100 nm) compared to the control mortar. The 28-day and 90-day compressive strength variations of mortars were also determined by observing pronounced reduction due to the appearance of expansive compounds responsible for microcracking.
Sponsor: The authors express their thanks to C.T.S. Spain for providing the ethyl silicate used in this study. The authors also acknowledge the University of Alicante Technical Research Services (SSTTI) for the analysis performed using their equipment, which was financed by the EU, MINECO, and Generalitat Valenciana (State Programme for Knowledge Generation and Scientific and Technological Strengthening of the R+D+i System and P.O. FEDER 2007-2013 funds).
URI: http://hdl.handle.net/10045/101395
ISSN: 2076-3417
DOI: 10.3390/app9245297
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 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 (http://creativecommons.org/licenses/by/4.0/).
Peer Review: si
Publisher version: https://doi.org/10.3390/app9245297
Appears in Collections:INV - DMCIA - Artículos de Revistas
INV - TECMATER - Artículos de Revistas

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