Materiales de Construcción, Vol 43, No 232 (1993)

Evaluation of hydrophobic treatments applied to stones used in andalusian cathedrals. III.-Accelerated weathering test with polluted atmosphere


https://doi.org/10.3989/mc.1993.v43.i232.665

R. Villegas Sánchez
Dpto. Ingeniería Química y Ambiental. Esc. Sup. Ingenieros Industriales. Univ. Sevilla, Spain

J. F. Vale Parapar
Dpto. Ingeniería Química y Ambiental. Esc. Sup. Ingenieros Industriales. Univ. Sevilla, Spain

Abstract


SUMMARY In this work we study the weathering resistance of samples of five types of stone used in Andalusian Cathedrals, treated with six water repellent products, by subjecting the samples to a SO2 polluted atmosphere.
To evaluate the alteration of the samples, besides visual observation of macroscopic aspect, changes in weight and the quantity of sulfate that remains on the surface have been measured. Also properties related with water have been measured after the test to determine if there have been any changes in the hydrophobic characteristics.

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