31 documents found, page 1 of 4
Prospection of the Red Biological Patinas Influencing the Urban Scenery Archite...
Sitzia, Fabio; Lisci, Carla; Dias, Luís; Arantes, Sílvia; Caldeira, Ana TeresaPortugal’s architecture reflects a rich history influenced by Roman, Moorish, Neoclassical and Romantic styles, with the 20th century marked by Art Deco and colonial influences. Regional styles vary, with white-painted buildings commonly experiencing color changes due to biofilm formation. Visually striking are the red-colored biological patinascommon in the coastal areas. A survey of 120 historical buildings a...
Aging of Limestones and Silane–Siloxane-Based Protective Hydrophobics: The Impa...
Lisci, Carla; Sitzia, Fabio; Pires, Vera; Mirao, JoséStones are traditionally used in construction and architectural applications as building elements due to their aesthetic and technical/structural performance. Like other environmental factors (rain, humidity, moisture, salt presence, biological activity, etc.), heating–cooling and freeze–thaw cycles significantly threaten the longevity of stone materials. Hence, considering the socio-economic and cultural value...
Prospection of the Red Biological Patinas Influencing the Urban Scenery Archite...
Sitzia, Fabio; Lisci, Carla; Dias, Luis; Arantes, Silvia; Caldeira, TeresaPortugal’s architecture reflects a rich history influenced by Roman, Moorish, Neoclassical and Romantic styles, with the 20th century marked by Art Deco and colonial influences. Regional styles vary, with white-painted buildings commonly experiencing color changes due to biofilm formation. Visually striking are the red-colored biological patinascommon in the coastal areas. A survey of 120 historical buildings a...
Evaluating building stones: Physical-mechanical changes from high-temperature f...
Pires, Vera; Sitzia, Fabio; Lisci, Carla; Cordeiro, LicinioHeritage sites built with natural stone are at risk from fires, which can alter stone properties and compromise its structural integrity. Over 60 studies in the past three decades have examined fire impact on natural stone, providing insights for their prevention and restoration. The primary objectives are to develop effective strategies to mitigate fire risks, protect heritage structures, and ensure the preser...
Comparative multi-analytical study to forecast marble and limestone structural ...
Pires, Vera; Sitzia, Fabio; Lisci, Carla; Mirao, José; Lopes, LuisFor centuries, natural stone has adorned facades, evolving from thick construction elements to thin cladding applications due to advanced cutting technologies. However, durability issues, especially in thin marble cladding, have surfaced after approximately 50 years of installation, as seen in iconic structures like the Amoco Building and Finlandia Hall. This study focuses on characterizing Carrara and Ruivina ...
Hydrophobic Coatings’ Efficiency and Limestones’ Resistance to Salt Crystallisa...
Lisci, Carla; Galhano, Carlos; Simão, Joaquim; Pires, Vera; Sitzia, Fabio; Mirao, JoséStone deterioration is significantly influenced by the process of salt crystallisation. The expansion of salt crystals on a porous framework exerts pressure on the solid fraction, causing the stone to deteriorate when the internal pressure of salt surpasses the stone’s strength. Protective coatings are employed to effectively hinder or substantially reduce the penetration of water and saline solutions. This stu...
Trentepohlia Algae as a Diagnostic Tool for Historic Mediterranean – style Houses
Sitzia, Fabio; Pires, Vera; Lisci, Carla; Neves, Samuel; Mirao, JoséTrentepohlia is a genus of filamentous chlorophytes green algae commonly found in association with fungi and bacteria on building envelopes. Their colonies have a characteristic red colouration which results from the production of b-carotene and hematochrome pigments. They are commonly present on walls, roofs and other external building structures and thrive in humid and shaded environments where sufficient moi...
Laboratorial Simulation for Assessing the Performance of Slates as Construction...
Sitzia, Fabio; Lisci, Carla; Pires, Vera; Alves, Tiago; Mirão, joséThis paper presents the results of a laboratory simulation of a subarctic climate carried out in climatic chamber. Realistic daily and seasonal cycles of temperature of a regular subarctic continental climate without dry seasons (Dfc) were simulated and the physical/mechanical properties and performance of the slates were assessed. The slate was selected because of its use as cladding and roofing material in co...
Stone Endurance: A Comparative Analysis of Natural and Artificial Weathering on...
Lisci, Carla; Sitzia, Fabio; Pires, Vera; Aniceto, Marco; Mirão, JoséThe long-term endurance of building stones must be assured since their longevity has repercussions for their economic and social value. Frequently, slabs for flooring and cladding are installed with polished finishing in outdoor environments for technical and ornamental purposes in cultural heritage sites and modern civil architecture. Compared to any other finishing, glossy surfaces are rather vulnerable to we...
Evaluating the biosusceptibility of natural stone as an supporting tool to prev...
Dias, Luis; Pires, Vera; Sitzia, Fabio; Lisci, Carla; Candeias, António; Caldeira, Ana teresaBiodeterioration of construction materials is still a major challenge that conservator-restorers face, especially in historic monuments with high cultural value. Natural stone is highly susceptible to deterioration through physical, chemical, and biological ways, whereas biological proliferation may potentiate both chemical and physical deterioration. The composition of the colonizers and their proliferation ar...