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The Evaluation of Crystallization Modifiers for Controlling Salt Damage to Limestone by Charles Selwitz; Eric Doehne is a Arts and Humanities article available to read on EtoBox.

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Crystallization modifiers can significantly affect the capillary passage of dilute and concentrated solutions of sodium chloride and sodium sulfate through columns of limestone. In the absence of modifiers, sodium chloride passage through Monks Park limestone gave predominantly subflorescence with mild edge erosion while sodium sulfate mainly effloresced and severely damaged the stone column. With Texas Creme limestone, a stone of moderately higher porosity, essentially only efflorescence occurred with either salt and there was little or no stone damage. Uniquely, alkali ferrocyanides were found to impact significantly on the interaction of these solutions as they moved through the limestone. The addition of 0.10-1.00% of K 4 Fe(CN) 6 to sodium chloride in Monks Park limestone experiments increased the flow rate of solutions through the stone, resulting in efflorescence in place of subflorescence, and yielded a massive formation of extended dendritic filaments without damaging the stone. This protection by additive was extended to sodium sulfate solutions, but only at lower salt concentrations. Results comparable to the effect of adding K 4 Fe(CN) 6 to concentrated sodium chloride

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Author

Charles Selwitz; Eric Doehne

Publisher

Elsevier Science; Elsevier ; Elsevier Masson; Elsevier BV (ISSN 1296-2074)

Published

2002

Language

EN

Field

Arts and Humanities (Physical Sciences)