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Author(s): A. S. Guimarães
J. M. P. Q. Delgado
V. P. de Freitas
T. Rego
Title: The effect of salt solutions in the capillarity absorption coefficient of red brick samples
Issue Date: 2016-07-06
Abstract: Rising damp is one of construction's major problems associated with use of porousmaterials in this industry. This mechanism has a massive influence on the degradation of historicalbuildings since they were built in a time when construction technologies made no effort to preventthis kind of pathologies. The rising damp by itself can reduce the aesthetical value of the buildingand, when combined with the existence of soluble salts in the building and in the ground water caneven lead to material decomposition and compromise the structural performance of the building.This happens due to the migration of the salt ions dissolved in water into the porous network of thebuilding's walls where they remain and crystalize after water evaporates, dealing great pressuresagainst the pore walls and eventually resulting in their fracture after many cycles ofcrystallization/dissolution.The experimental work intended to study the effect of two different saturated solutions ofsodium sulphate and potassium chloride in the capillary absorption curves obtained through thepartial immersion of red brick samples. In the end of this paper there will be a macroscopicevaluation of the sample's crystallized top surface, obtained after a partial drying period. The resultsrevealed significant differences in the capillary coefficients obtained when samples were tested withsalt solutions.
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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