Pore Structure Degradation of Different Cement Mortars Exposed to Sulphuric Acid
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AuthorMarcos Ortega, Jose; García Vera, Victoria Eugenia; Miguel Solak, Alfonso; Tenza-Abril, Antonio Jose
Knowledge AreaCiencia de los Materiales e Ingeniería Metalúrgica; Física Aplicada; Ingeniería Química; Química-Física
SponsorsThe 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).
Realizado en/conUniversidad de Alicante
Bibliographic CitationOrtega 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. https://doi.org/10.3390/app9245297
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.
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