The resistance of ethyl silicate-consolidated bricks to sodium sulfate crystallization cycles was evaluated. A commercial ethyl silicate (ES) based product was applied by brushing with 5 or 10 strokes to assess the effect on distribution/accumulation of the consolidant inside the pores. After long-term curing, aimed at making ES-treated samples lose their temporary hydrophobicity, samples were characterized by assessing the penetration depth of consolidants, tensile strength and modifications in open porosity and pore size distribution. Resistance to salt crystallization was evaluated by carrying out sodium sulfate crystallization cycles. The capillary suction of the salt solution was let occur through the untreated surface of cubic samples treated in the upper face, in order to investigate brick response to salts coming from behind the consolidated layer (the situation usually occurring when rising damp is present). Treatment with either 5 or 10 strokes provided protection against salt damage, and no accumulation of salt behind the consolidated layer was observed.
Consolidation of fired-clay bricks by ethil silicate: durability to salt crystalization
FRANZONI, ELISA;SASSONI, ENRICO;GRAZIANI, GABRIELA;FREGNI, ALBERTO
2014
Abstract
The resistance of ethyl silicate-consolidated bricks to sodium sulfate crystallization cycles was evaluated. A commercial ethyl silicate (ES) based product was applied by brushing with 5 or 10 strokes to assess the effect on distribution/accumulation of the consolidant inside the pores. After long-term curing, aimed at making ES-treated samples lose their temporary hydrophobicity, samples were characterized by assessing the penetration depth of consolidants, tensile strength and modifications in open porosity and pore size distribution. Resistance to salt crystallization was evaluated by carrying out sodium sulfate crystallization cycles. The capillary suction of the salt solution was let occur through the untreated surface of cubic samples treated in the upper face, in order to investigate brick response to salts coming from behind the consolidated layer (the situation usually occurring when rising damp is present). Treatment with either 5 or 10 strokes provided protection against salt damage, and no accumulation of salt behind the consolidated layer was observed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
