Jose Mirao

Jose Mirao
Universidade de Évora | uevora · Laboratório HERCULES - Herança Cultural, Estudos e Salvaguarda

Doctor of Philosophy

About

323
Publications
64,312
Reads
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2,251
Citations
Citations since 2016
178 Research Items
1882 Citations
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20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400

Publications

Publications (323)
Article
Full-text available
Photodegradation is the alteration of the materials due to exposure to sunlight. This phenomenon is evident in paint, ink, pharmaceuticals and polymers. In polymers, photodegradation is caused by ultraviolet radiation (300–400 nm), which activates the breaking of C-C bonds and the formation of hydroperoxides, thermolabile substances. Although to a...
Article
Full-text available
Particle-size analysis on ancient mortars and concretes aggregate is today a common practice in Cultural Heritage and civil engineering. Normally, a particle-size distribution of mortar aggregates on in situ materials is carried out using sieves, following the dissolution of the carbonate binder. This technique needs about 200 g of material per sam...
Article
Limestones are often used as building stones in contemporary architecture. Salt weathering is one of the main threats affecting this lithology. In this study, two Portuguese limestones (Branco Real and Lioz Coral) were subjected to laboratory salt crystallisation cycles by reconsidering the normative EN 12370 (Determination of the resistance to cry...
Article
The SW of Iberia registers diverse examples of mining remnants from activities that ceased during the twentieth century, namely in the Ossa-Morena Zone. Such activities exposed outcrops that are part of the mining heritage of the Alentejo region (Portugal), and examples of that are found throughout the Évora–Montemor-o-Novo region at the ancient Mo...
Article
Stone polishing is a process executed to make the surface glossy, so that the material shines by reflecting the light. The polishing is mainly carried out in flooring and façade cladding to improve the aesthetic properties of the stones. In particular on calcareous stones, polishing is not a permanent feature because various atmospheric agents in o...
Article
Full-text available
A multidisciplinary approach has been applied to investigate the production technology of a collection of copper-based artefacts found during archaeological excavation campaigns carried out in the Almohad neighbourhood of Mārtulah, the Islamic name of modern Mértola (South of Portugal). In stark contrast to other Islamic materials found in the same...
Article
Full-text available
The use of concrete materials in Portugal, namely reinforced concrete, began in the 19th century. However, during the 20th century, the increase in the application of this composite material, alongside the use of hydraulic binders, led to a disruption of traditional construction techniques and enhanced generalized application in concrete structures...
Article
Full-text available
Pottery traditions reflect the socioeconomic framework of past cultures, while the spatial distribution of pottery indicates exchange patterns and interaction processes. Material and earth sciences are employed here to determine raw material sourcing, selection and processing. The Kongo kingdom, internationally renowned since the late fifteenth cen...
Article
Full-text available
Samples of orange patinas found on a limestone window tracery and an ornament of the Batalha Monastery have been investigated by X-ray micro-diffractometry (μ-XRD) and low-vacuum scanning electron microscopy coupled with energy dispersive spectrometry (LV-SEM + EDS). The aim of the study was to determine the composition of the layered patinas, asse...
Patent
The present invention relates to a method for identification, characterization and evaluation of underground metallic mineral deposits, in particular of volcanogenic massive sulphide mineral deposits located some hundred meters below topographic surface by identifying upward metal escape routes and metal distribution in rock rheological plans that...
Conference Paper
Full-text available
In the last decade, promising results with phosphate-based solutions have been presented as a consolidant (Sassoni et al., 2011), and mitigation of bowing (Menningen et al., 2020) to be applied to carbonated materials with loss of cohesion. Delaying the definition of a general protocol for application on-site, several questions remain open, such as...
Article
Full-text available
Large-scale release of isotopically light carbon is responsible for the carbon isotope excursion (CIE) of the Toarcian Oceanic Anoxic Event during the Lower Jurassic. Proposed sources include methane hydrate dissociation, volcanogenic outgassing of carbon dioxide and/or thermogenic methane release from the Karoo-Ferrar magmatic province (southern A...
Article
The Azenhas and Alvito Fe-deposits are located at SW of the Iberian Variscan belt, in a wide Fe-Zn ore district (Montemor-Ficalho Belt), part of the Ossa-Morena Zone. Both deposits are dominantly composed of magnetite ores that display distinct ore formation processes and, at the Azenhas deposit, massive magnetite ores are mainly hosted in amphibol...
Article
Full-text available
The Escoural gold district belongs to the Montemor-Ficalho metallogenic belt which is part of the Portuguese section of Ossa-Morena Zone (OMZ), at the SW of Iberia. The Escoural gold district includes twelve gold prospects and/or deposits largely controlled by the NW-SE Montemor-o-Novo Shear Zone (MNSZ) and associated fault zones, extending for app...
Preprint
Full-text available
The SW of Iberia registers diverse examples of mining remnants from activities that ceased during the 20th century, namely in the Ossa-Morena Zone. Such activities exposed outcrops that make part of the mining heritage of the Alentejo province (Portugal), and examples of that are found throughout the Évora – Montemor-o-Novo region at the ancient Mo...
Preprint
Full-text available
A multidisciplinary approach has been applied to investigate the production technology of a collection of copper-based artefacts found during archaeological excavation campaigns carried out in the Almohad neighbourhood of Mārtulah, the Islamic name of modern Mértola (South of Portugal). In stark contrast to other Islamic materials found in the same...
Article
This analysis focused on one hundred and fifteen lithic arrowheads recovered from the Zambujeiro and Mitra 2 dolmens, funerary monuments in Évora, Portugal. These were analyzed by noninvasive and minimally invasive analytical techniques, including handheld X‐ray fluorescence (hXRF), variable pressure scanning electron microscope coupled with energy...
Article
Full-text available
In the present work, a fragment of a stone mould recently found in Galicia (NW Spain) was studied by multiple analytical techniques approach involving 3D optical imaging reconstruction to obtain data about the shape of the mould, typology of artefact produced, and distribution of a black residue at the surface of the mould and pXRF, SEM-EDS, micro-...
Article
Full-text available
In this work, a protocol of a partially invasive sampling for the archaeometric characterization of ancient mortars from the little Roman Bath of Nora (Sardinia, Italy) is presented. Optical microscopy and different analytical techniques such as X-ray diffraction, X-ray fluorescence, thermo-gravimetric analysis, and physical/mechanical tests have b...
Article
Building stone materials have to satisfy long-term durability requirements in different environments in terms of mechanical strength and resistance to aggressive conditions. Several studies and field observations show that weathering on geo-materials is related to average annual precipitation and temperature. The decay also depends on salts air/soi...
Article
Full-text available
Conservation, increasing the useful life period of existing significant buildings with minimum consumption of new materials, as much as possible of low-embodied energy, is an important step towards sustainable rehabilitation, while also contributing to the preservation of the cultural heritage. In the context of 20th-century buildings’ conservation...
Article
Full-text available
p class="Abstract">To assess the provenance of the limestones used in the construction and restoration of the Batalha Monastery in central Portugal, stone samples collected from the monument and from five limestone quarries in the region surrounding the building were investigated by energy-dispersive X-ray fluorescence spectroscopy (ED-XRF), powder...
Conference Paper
Full-text available
AboveJC, hydrothermal alteration is responsible for change in the colour of pelitic rocks (initially black shale). The main processes are carbonatization, chloritization, sericitization, hydration and iron reduction. Immediately above JC, there is enrichment in chalcophile elements (decreasing upwards, which suggests that the hydrothermal syste...
Article
This study focuses on the analysis of Islamic ceramics from the Alcaçova of Santarém, Portugal. To establish the ceramic raw material provenance and ceramic technology, a set of raw materials were sampled and compared with the archaeological ceramics. Raw materials were dry sieved to increase the clay content, to reconstruct the ceramist homogeniza...
Article
This research aims to underline distinctive features to detect synthetic ochres on paintings, being the use of synthetic red widespread and well documented since Prehistory, while synthetic Mars yellow has been commercialized since the eighteenth century. Mars yellow was synthesized from Fe(NO3)3 and KOH reaction, according to ancient recipes. Hema...
Preprint
Full-text available
Samples of orange patinas found on a limestone balustrade and an ornament of the Batalha Monastery have been investigated by X-ray micro-diffractometry (µ-XRD) and Low-Vacuum Scanning Electron Microscopy coupled with Energy Dispersive Spectrometry (LV-SEM + EDS). Aim of the study was to determine the composition of the layered patinas, assess wheth...
Article
Full-text available
Hypogenic caves represent unique environments for the development of specific microbial communities that need to be studied. Caves with rock art pose an additional challenge due to the fragility of the paintings and engravings and to microbial colonization which may induce chemical, mechanical and aesthetic alterations. Therefore, it is essential t...
Article
Full-text available
The conservation and preservation of museum collections requires a detailed understanding of their constituent materials which are often natural, synthetic or semi-synthetic polymers. The use of a wide variety of instrumental techniques can give an extraordinary amount of quality information, by delivering complementary data regarding composition a...
Article
The Mociços Cu-deposit is part of a cluster of ancient copper mines in the Sousel-Barrancos metallogenic belt in the Ossa-Morena Zone at the SW Iberia. The orebodies develop along NNW-SSE quartz-carbonate-sulfides veins with pyrite and chalcopyrite as the main sulfide phases, and ore emplacement has been attributed to copper remobilization from the...
Article
The maintenance plan of ancient and contemporary buildings today takes on strategic importance and should include the identification of climatic environment where the structures are located. Researcher are trying to evaluate the response to weathering of the building materials by accelerated ageing tests. This technique often consists of the “aggra...
Article
Full-text available
Studies focusing on Palaeolithic portable rock art have a long tradition in Europe. Nevertheless, they tend to only focus over formal and stylistic criteria of the motifs, important as they provide chronolo- gies for cave art. This article proposes a multiple approach to a sample of 25 engraved plaques of the Foz do Medal archaeological site, where...
Article
Cultural Heritage objects are frequently unavailable for transportation to laboratory facilities due to their size, location or local Cultural Heritage preservation regulations. The development of handheld XRF (hXRF) systems has, therefore, proven to be essential in the study of unmovable objects. In this study, two handheld XRF instruments—Bruker™...
Article
Full-text available
The InCarbon project based on the principles of CO2 capture and storage technologies, aims to study the potential of in situ mineral carbonation in mafic rocks in Alentejo. The gabbro of Sines massif was selected for the first laboratory test of mineral carbonation due to its geochemical, mineralogical and textural characteristics and proximity to...
Article
Full-text available
Goa Cathedral former altarpiece, attributed to Garcia Fernandes and made around 1538, is one of the oldest western pictorial works in India. It is a work of great importance in the establishment of the conquest of Goa by the Portuguese but also for understanding the influence of Portuguese painting overseas. Goa Cathedral former altarpiece is revea...
Article
Full-text available
The potential for mineral carbonation of CO2 in plutonic mafic rocks is addressed through a set of laboratory experiments on cumulate gabbro and gabbro-diorite specimens from the Sines Massif (Portugal). The experiments were conducted in an autoclave, for a maximum of 64 days, using a CO2 supersaturated brine under pressure and temperature conditio...
Article
Full-text available
This paper focuses on the study of different Roman mortars (renders, finishing coats), used in the construction and restoration of the Forum Traiani thermal baths (Central Sardinia, Italy), a significant example of the Roman-style architecture in Sardinia. The archaeological site is located in a high hydrogeological risk area, due to the cyclical f...
Article
Full-text available
Combining historical, archaeological and experimental data, traditional and archaeological ceramics, from the Santarém district, with different chronology and functions have been studied. Our aim is to understand ancient pottery technology and to evaluate whether ceramic production followed similar principles in the Middle Ages (from the Islamic to...
Article
Full-text available
The study performed on the stone materials from the Convent of Christ revealed the presence of a complex microbial ecosystem, emphasizing the determinant role of microorganisms on the biodecay of this built cultural heritage. In this case study, the presence of Rubrobacter sp., Arthrobacter sp., Roseomonas sp., and Marinobacter sp. seems to be resp...
Poster
Full-text available
Natural Stone has always been one of the most widely used and appreciated materials in the construction of important structures, buildings and works of art. It is extremely important that the stone purchased by the consumer meets the expectations for which it was chosen, being colour one of the main aspects. Currently, there are companies with very...
Article
Colour in historic and modern architecture is one of the most important visible characteristics that should be preserved along the times. There are many factors that can induce stone weathering, promoting its discolouration. Among these factors, microorganisms’ action was neglected for many decades, and nowadays there is a lack of association in th...
Article
Full-text available
In Pinhal Novo, Palmela, and neighboring municipalities, southern Lisbon region, there are a great number of small adobe masonry dwellings, made in the first half of the twentieth century. The vernacular dwellings were constructed by families that came from the north/center region of Portugal to work at the local manors and were called Caramel´s. A...
Article
Full-text available
The metallic artifacts of the prehistoric fortified settlement of Leceia (Oeiras) inventory and analytical study. This paper presents the results of a study carried on a collection of 144 metal artefacts from the Early (ca. 2800-2600/2500 a.C.) and the Middle/Final Chalcolithic (ca. 2600/2500-2000 a.C.), found at the site of Leceia (Oeiras, Centra...
Article
This study characterises and compares tin-opacified underglaze-decorated tiles from Valencian and Sevillian provenances. This technique, where the cobalt and manganese pigments are applied below an opaque white glaze, was used in the Iberian Peninsula between the 14th and early 16th centuries. The chemical and morphological characterisation of the...
Article
The São Domingos area (Corte do Pinto, Portugal) represents a large sulfide ore deposit in the Iberian Pyrite Belt that was mined primarily for copper and sulfur in the past. Currently, the deserted mine and mine wastes are the reason for the production of acid mining drainage releasing potentially harmful elements. Because metastable secondary sul...
Chapter
Full-text available
Cultural and funerary uses of red pigments are frequently discovered in Neolithic and Chalcolithic contexts across the Iberian Peninsula. While ferric pigments (like ochre) usually indicate a locally-obtained raw material, the far less abundant cinnabar (mercury sulfide) can be used as a marker for long-distance exchange networks. Reported uses of...
Article
This paper reports the results of a multi analytical research undertaken on a mural and on a panel painting altarpiece authored by José de Escovar in 1603, one of the most productive and controversial painters working for Évora Archiepiscopate at the end of the 16th century and beginning of the 17th century. The two paintings are among his first do...
Article
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Report on two new previously unknown 16th century majolica azulejo panels recently uncovered at the Cathedral Church of Santa Maria in Setúbal, Portugal and historical & analytical study thereof
Article
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The painting collection of Santa Casa da Misericórdia da Lourinhã is amongst Portugal’s most notable and scarcely best-known cultural heritage. The artistic interest of this pictorial group, besides the advanced state of degradation of a number of the paintings, together with the ruined circumstances of the building accommodating the collection, to...
Poster
Full-text available
The castle of Castro Marim archaeological site is located at the highest point of the town with the same name on the southern margin of Portugal close to the border with Spain. The site is placed in the hilltop 30 meters above sea level, elevated along a swampy area between the south eastern coast of the Algarve and the mouth of the Guadiana river....