2026-04-17T00:40:50Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1884272025-12-05T05:34:52Zcom_2072_1057col_2072_478857col_2072_478917

00925njm 22002777a 4500 dc Miriello, Domenico author Barba, Luís author Barba Pingarron, Arturo author Barca, Donatella author Bloise Andrea author González Parra, Jesús Rafael author Crisci, Gino author De Luca, Raffaella author Girimonte, Genea author Ruvalcaba Sil, Jose Luis author Pecci, Alessandra author 2022-08-26T15:20:50Z 2024-07-31T05:10:07Z 2021-07-31 2022-08-26T15:20:51Z Hydraulicity is a well-known characteristic of mortars and plasters from the Roman, Late Roman, and Medieval periods, while the use of hydraulic mortars in pre-Columbian Mesoamerica and Central Mexico in particular, has not received equal attention. To address this issue, in this paper, we discuss the problem of hydraulicity and suggest a method to study it in Mesoamerican plasters. To prove the effectiveness of this method, we selected plaster samples from the archaeological site of Teotihuacan (Mexico), the main city of Central Mexico during the Classic period. The characterisation of plaster samples confirmed that, similar to other Teotihuacan plasters, they are made of two layers: the outermost layer (enlucido), composed of a mixture of lime and volcanic glass shards, and the underlying layer locally called firme, consisting of crushed volcanic scoria (tezontle) mixed with a mudbased binder. The compositional characterisation of the plasters confirmed their hydraulicity and the combination of microchemical (energy dispersive spectrometer (EDS) microchemical analysis), microphysical (Vickers microhardness), and petrographic (optical microscopy) measurements demonstrated that it was not the presence of glass shards in the external plaster layer which produced hydraulicity, as we originally thought. Instead, this was due to the reactivity of the tezontle, present in the lower layer. This suggests that the small thickness of the enlucido layer, in addition to save the amount of lime used, increased its performance, promoting chemical reactions with the tezontle in the contact layer and that the glass shards played another role in the mixture, rather than producing hydraulicity. Arqueometria Guix Teotihuacán (San Juan Teotihuacán, Mèxic : Jaciment arqueològic) Archaeometry Plaster Teotihuacán Site (San Juan Teotihuacán, Mexico) Hydraulicity of lime plasters from Teotihuacan, Mexico: a microchemical and microphysical approach