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Communication Dans Un Congrès Année : 2012

Geological origin of the reagents constituting the Roman mortar, according to Vitruvius

L'origine géologique des composants réactifs constituant le mortier romain d'après Vitruve

Résumé

It was established that the volcanic sands, around Rome, have physical properties, which make them correspond to the "harenae fossiciae" described by Vitruvius (II, 4). However, Vitruvius states that the best of all sands extracted from volcanic tuffs is what he calls the tuff "carbunculus" "carboncle" or "materia excocta", which is a "soft volcanic tuff calcined by underground fire". He also claims that it is found geologically in Etruria, in the volcanic area located in the north of Rome. Vitruvius uses this volcanic sand exclusively for concrete masonry, whereas regular pozzolana from Napoli (puluis) is especially employed for marine piers. He described, as a geologist, the formation of construction materials starting from volcanic fire and, as an architect and engineer, the reasons for which the volcanic reagents react so well with lime. Thus the volcanic tuff carbunculus refers to a pyroclastic rock traversed by degassing pipes, called "fossil fumaroles".
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hal-04080380 , version 1 (24-04-2023)

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  • HAL Id : hal-04080380 , version 1

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Fréderic Davidovits. Geological origin of the reagents constituting the Roman mortar, according to Vitruvius. Fourth International Congress on Construction History, Paris, 3-7 July 2012, Ecole nationale supérieure d'architecture de Paris-Malaquais, Association francophone d'histoire de la construction, Jul 2012, Paris, France. pp.517-522. ⟨hal-04080380⟩

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