12 documents found, page 1 of 2
Mineralogical and chemical characterization of historical mortars from military...
Santos Silva, A.; Cruz, T.; Paiva, M.J.; Candeias, A.; Adriano, P.; Schiavon, N.; Mirão, J.P.Abstract Historical mortars from sixteenth to seventeenth century military forts located at the mouth of the Tagus River in Lisbon have been characterized by polarized light microscopy (PLM), thermal analysis (TG/DTA), X-ray diffractometry (XRD) and scanning electron microscopy + energy dispersive spectroscopy (SEM + EDS). The results indicate that the mortars used were all hydraulic lime-based. The presence of...
The importance of SEM-EDS analysis in the study of old mortars
Adriano, P.; Santos Silva, A.; Veigas, M.R.; Mirao, J.; Candeias, A.The study of old mortars composition, using physical-chemical, mineralogical and microstructural characterization has an important role in the preservation of architectural heritage, allowing a deep knowledge about the materials used, construction techniques, possible repairs and degradation processes [1-4]. In this paper, we present representative results of the application of scanning electron microscopy (SEM...
Microscopic characterisation of old mortars from the Santa Maria Church in Évora
Adriano, P.; Santos Silva, A.; Veiga, R.; Mirão, J.; Candeias, A.E.Evora Cathedral (one of the most emblematic monuments of Evora—Portugal) has suffered several conservation and restoration interventions through the ages, without, however, any type of previous knowledge about mortars and materials used. This work was carried out in order to identify the mortar's composition in different locations, which were attributed to different construction or conservation periods. The cha...
Characterization of historical mortars from Alentejo religious buildings
Santos Silva, A.; Adriano, P.; Magalhães, A.; Pires, J.; Carvalho, A.; Cruz, A.J.; Mirão, J.; Candeias, A.Alentejo religious buildings reflect undoubtedly the history and character of this southern Portugal region. These buildings conservation requires a deep knowledge of their masonry’s and renders’ lime mortars, to evaluate correctly their state of conservation, to avoid progression of pathological situations and to plan efficient interventions, with repair and substitution materials with similar characteristics....
Optical microscopy analysis of mortars from Tagus River 16th and 17th century f...
Guerreiro, T.; Santos Silva, A.; Adriano, P.; Candeias, A.; Mirão, J.Mortars are common and essential elements of masonry historical buildings [1] and are composed by a binder, aggregates and eventually, some additives. The binder provides consistency to this composite material, and until the emergence of Portland cement in the 19th century, lime was the main binder used. The aggregates are normally sand or rock fragments with variable sizes. The whole set is morphologically ver...
Characterisation of roman mortars from the historical town of Mertola
Silva, A.S.; Ricardo, J.; Salta, M.; Adriano, P.; Mirao, J.; Candeias, A.E.Ancient mortars from two Mertola’s important Roman monuments, the River Tower and the Cryptoportic, were characterized by optical microscopy, scanning electron microscopy, X-ray diffraction, thermogravimetric and chemical analyses. The results show that all mortars are calcitic aerial lime mortars and that the aggregates are composed of quartzitic river sand and crushed schist. Samples from the River Tower and ...
Mineralogical and chemical characterization of historical mortars from military...
Santos Silva, A.; Cruz, T.; Paiva, M. J.; Adriano, P.; Candeias, A.; Schiavon, N.; Mirão, J.Historical mortars from sixteenth to seventeenth century military forts located at the mouth of the Tagus River in Lisbon have been characterized by polarized light microscopy (PLM), thermal analysis (TG/DTA), X-ray diffractometry (XRD) and scanning electron microscopy + energy dispersive spectroscopy (SEM + EDS). The results indicate that the mortars used were all hydraulic lime-based. The presence of well-rou...
Mineralogical and chemical characterization of historical mortars
Santos Silva, A.; Cruz, T.; Paiva, M. J.; Candeias, A.; Adriano, P.; Schiavon, N.; Mirão, J.Historical mortars from sixteenth to seventeenth century military forts located at the mouth of the Tagus River in Lisbon have been characterized by polarized light microscopy (PLM), thermal analysis (TG/DTA), X-ray diffractometry (XRD) and scanning electron microscopy / energy dispersive spectroscopy (SEM/EDS). The results indicate that the mortars used were all hydraulic lime-based. The presence of well-round...
Characterization of historical mortars from Alentejo’s religious buildings
Santos Silva, A.; Adriano, P.; Magalhães, A.; Pires, J.; Carvalho, A.; Cruz, A. J.; Mirão, J.; Candeias, A.Alentejo religious buildings reflect undoubtedly the history and character of this southern Portugal region. These buildings conservation requires a deep knowledge of their masonry’s and renders’ lime mortars, to evaluate correctly their state of conservation, to avoid progression of pathological situations and to plan efficient interventions, with repair and substitution materials with similar characteristics....
Extracting buildings in the city of Lisbon using Quickbird images and lidar data
Santos, T.; Freire, S.; Navarro, A.; Soares, F.; Dinis, J.; Adriano, P.; Fonseca, A. M.; Tenedório, J.The methodology is based on semi-automatic extraction of features, using information from a QuickBird image and LIDAR data. The QuickBird image is suitable to delineate the different elements on the surface based on their spectral characteristics. However, this task is much more successful and richer when altimetric information is also used in the extraction process. Thus, with the introduction of LIDAR data, w...