Influence of crystalline admixtures on the short-term behaviour of mortars exposed to sulphuric acid
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AuthorGarcía Vera, Victoria Eugenia; Tenza Abril, Antonio José; Saval Pérez, José Miguel; Lanzón Torres, Juan Marcos
Knowledge AreaConstrucciones Arquitectónicas
SponsorsThis research was funded by the University of Alicante (GRE13-03) and (VIGROB-256).
Bibliographic CitationGarcía-Vera, V.E.; Tenza-Abril, A.J.; Saval, J.M.; Lanzón, M. Influence of Crystalline Admixtures on the Short-Term Behaviour of Mortars Exposed to Sulphuric Acid. Materials 2019, 12, 82. https://doi.org/10.3390/ma12010082
Sulphuric acid attack
Using durable materials is a sustainable solution for extending the lifetime of constructions. The use of crystalline admixtures makes cementitious materials more durable. They plug pores, capillary tracts and microcracks, blocking the entrance of water due to the formation of crystals that prevent the penetration of liquids. The literature has covered the performance of these admixtures on concrete, but studies on mortars are still scarce. The aim of this study is to investigate the effect of an aggressive environment (sulphuric acid solution—3 wt%) on mortars produced with different percentages of a crystalline admixture (1%, 1.5% and 2% by weight of cement content). Physical and mechanical properties were studied after immersing the mortars in a H2SO4 solution for 90 days. It was found that, after a 90-day sulphuric acid exposure, mortars with the crystalline admixture showed greater compressive strength than the control mortar, besides exhibiting lower mass loss. However, the cryst ...
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