263 documents found, page 1 of 27
Influence of mortar type and unit type on compressive strength and stiffness of...
Briceño, C.; Azenha, Miguel; Vasconcelos, Graça; Lourenço, Paulo B.According to EN 1996 1-1, the compressive strength of masonry can be estimated based on information related to its components: units and mortar. While it is noticeable that the masonry unit's features (material, configuration, and compressive strength) play a considerable influence, the mortar also contributes to the masonry's structural behaviour due to the multiple functions it performs (load transfer, streng...
Exploring portable ultrasonic pulse velocity avails in the conservation assessm...
Almeida, António Mário; Pereira, Mário António; Vasconcelos, Graça; Carvalho, Salomé; Bordalo, Rui; Vieira, EduardaUltrasonic pulse velocity (UPV) is generally used in Civil Engineering as an in situ and non-destructive methodology to assess the condition of construction materials. Given the fact that non-contemporary sculpture was traditionally made with similar materials – stone, wood, clay or plaster – a hypothesis arose regarding the possible contribution of UPV for the conservation assessment of sculptures with stone-b...
An ICT-enhanced methodology for the characterization of vernacular built herita...
Arias Tapiero, Juan Camilo; Graus, Sandra; Khei, Soon; Silva, Dener; Conde, Otávio; Ferreira, Tiago Miguel; Ortega, Javier; Luso, EduardaThe characterization of vernacular buildings is crucial for understanding the historical, social, and cultural significance of a community. These buildings reflect a collective memory and result from a long adaptation process to the local environment. Documenting them facilitates better decisionmaking regarding the preservation of their intrinsic values and long-term conservation. Unfortunately, depopulation pr...
Influence of conditioning of clay bricks over shear strength of brick masonry
Briceño, Carolina; Azenha, Miguel; Vasconcelos, Graça; Lourenço, Paulo B.The physical properties of the units and mortar affect the bond between them, as well as the mechanical performance of the masonry. The initial absorption rate of brick units during the construction process can be influenced by its moisture content. This work aims at understanding the influence of different brick conditioning (without immersion in water, immersed for 1 - 2 s, and immersed for 30 min) on the she...
Experimental analysis of the mechanical behaviour of clay masonry with mortars ...
Fathi, Ahmad; Pereira, João Miguel; Pluijm, Rob van der; Vasconcelos, GraçaThis work reports a part of research aiming at the development of sustainable masonry systems. The objective of this research is to study the influence of novel mortars with recycled aggregates on the mechanical behaviour of masonry wallets, with specific focus on the compressive behaviour. Four different types of general-purpose mortar and two different types of clay units were used to construct the specimens ...
Caracterização mecânica de provetes de granito sujeitos a temperaturas elevadas
Ferreira, Débora; Fontes, Luiz Felipe Pires; Vasconcelos, Graça; Oliveira, Edna; Mesquita, L.M.R.O aumento da temperatura média na superfície da terra pode trazer diversas e complexas consequências ao meio ambiente, além de danos irreversíveis para a humanidade. Um dos efeitos diretos é o aumento do número de incêndios rurais, que possuem um elevado potencial de destruição não só para a fauna e a flora do local, mas também para o património vernáculo constituído. Estas construções rurais merecem ser cuidad...
Caracterização mecânica de provetes de granito sujeitos a temperaturas elevadas
Ferreira, Débora; Fontes, Luiz Felipe Pires; Vasconcelos, Graça; Oliveira, Edna; Mesquita, L.M.R.O aumento da temperatura média na superfície da terra pode trazer diversas e complexas consequências ao meio ambiente, além de danos irreversíveis para a humanidade. Um dos efeitos diretos é o aumento do número de incêndios rurais, que possuem um elevado potencial de destruição não só para a fauna e a flora do local, mas também para o património vernáculo constituído. Estas construções rurais merecem ser cuidad...
The INHAVIT project: sustainability-led approaches for the rehabilitation of th...
Ortega, Javier; Vasconcelos, Graça; Ferreira, Tiago Miguel; Rodrigues, Hugo; Luso, Eduarda; Arias, Juan; Graus, Sandra; Khei, Soon; Silva, DenerThe INHAVIT research project, funded by the Portuguese Foundation of Science and Technology (FCT), aims to study and identify the social, economic and environmental vulnerabilities that may be contributing to the current state of progressive abandonment of the rural villages of Montesinho Natural Park (MNP), in Portugal. Once the vulnerabilities are better understood, the main research question is whether the c...
A comparative analysis of sustainable management strategies for the conservatio...
Arias Tapiero, Juna Camilo; Ortega Heras, Javier; Vasconcelos, GraçaThe present paper aims to compare management strategies for the sustainable conservation of rural settlements and vernacular architecture. It addresses the difficulties that arise when analyzing this type of heritage and discusses the considerations that must be taken into account for its proper management. The process of management itself can be complex, as it requires understanding the social, cultural, envir...
Physical-mechanical properties of a granite used in the UNESCO World Heritage o...
Tomás, Roberto; Cano, Miguel; Pulgarín, Luis F.; Brotons, Vicente; Benavente, David; Miranda, Tiago F. S.; Vasconcelos, GraçaThis paper studies the evolution of physical and mechanical properties of 46 cubic samples of a granite widely used in the UNESCO World Heritage of the north of Portugal pre-treated at different temperatures (between 105 and 700 °C) and cooled under different conditions (i.e., aircooled and water-cooled). The results showed that specific gravity and mineralogy did not exhibit significant changes after the therm...