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Open AccessFeature PaperArticle

Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid

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Department of Civil Engineering, University of Alicante, 03080 Alicante, Spain
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Departamento de Arquitectura y Tecnología de la Edificación, Universidad Politécnica de Cartagena, 30203 Murcia, Spain
3
CYPEIngenieros S.A., 03003 Alicante, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(24), 5297; https://doi.org/10.3390/app9245297
Received: 12 November 2019 / Revised: 24 November 2019 / Accepted: 29 November 2019 / Published: 5 December 2019
(This article belongs to the Special Issue New Trends of Sustainability in Civil Engineering and Architecture)
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. View Full-Text
Keywords: microstructure; durability; acid rain; zinc stearate; ethyl silicate; nanosilica microstructure; durability; acid rain; zinc stearate; ethyl silicate; nanosilica
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MDPI and ACS Style

Ortega, J.M.; García-Vera, V.E.; Solak, A.M.; Tenza-Abril, A.J. Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid. Appl. Sci. 2019, 9, 5297.

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