Materiales de Construcción, Vol 60, No 299 (2010)

Characterization of pore system and their influence on decay rates caused by salt weathering on limestones and dolostones quarried in Abanto (Zaragoza, Spain)


https://doi.org/10.3989/mc.2010.50108

O. Buj
Universidad de Zaragoza. Facultad de Ciencias, Spain

P. L. López
Universidad de Zaragoza. Facultad de Ciencias, Spain

J. Gisbert
Universidad de Zaragoza. Facultad de Ciencias, Spain

Abstract


The Abanto natural stone is a rock used in modern constructions and currently quarried as an ornamental rock in Abanto, Zaragoza. The varieties described here are a limestone with depositional texture and a crystalline limestone. In this work we have carried out a detailed study of the mineralogy, texture, hydric behaviour, pore system characteristics, dynamic behaviour and behaviour against the effects of salt crystallisation. After 30 cycles of salts crystallization, the weight loss in these rocks is lower than 0.5%. This low weathering is a consequence of the configuration of their pore system, characterised by a low open porosity and high percentages of microporosity with pore-throat sizes on average of less than a 0.2 µm.

The petrographical and physical characteristics, as well as its high resistance against salt crystallisation confer these rocks a high technical quality for their use as building stones in modern construction.

Keywords


Limestone; Dolostone; Decay; Durability; Pore Size Distribution

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