Author
Cristiana Costa
Bio: Cristiana Costa is an academic researcher from University of Aveiro. The author has contributed to research in topics: Adobe & Geopolymer. The author has an hindex of 6, co-authored 13 publications receiving 86 citations.
Topics: Adobe, Geopolymer, Mafic, Ultramafic rock, Chlorite
Papers
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TL;DR: The Earth construction is the oldest building practice on the world as discussed by the authors and around 30% of the world population lives in buildings made of earth materials and these materials offer economic and environmental benefits.
Abstract: The Earth construction is the oldest building practice on the world. Around 30% of the world population lives in buildings made of earth materials. These materials offer economic and environmental ...
44 citations
TL;DR: In this paper, results on photochemical pollutants monitoring obtained in the field campaign CZCM-2001 were used as a database in photochemical trajectory model using the explicit mechanism Master Chemical Mechanism version 3 (MCM v3) aiming to simulate the formation of photochemical pollutant in air masses during the sea breeze circulation at Portugal West Coast.
20 citations
TL;DR: In this paper, the possibility of using geopolymers to fill gaps in glazed tiles has been evaluated and the results suggest that they are a possible option for the filling of tile gaps, given the characteristics that can be achieved.
16 citations
TL;DR: In this paper, the potential of using geopolymers to fill gaps/lacunae in glazed ceramic tiles (azulejos) has been studied, and the results suggest that the geopolymer had a better performance in the bonding of ceramic fragments and can have potential to be applied in the conservation and restoration of tile facades.
12 citations
TL;DR: In this article, a detailed field survey was carried out at the Caldeiras da Ribeira Grande boiling-mud pool, including the measurement of the sediments thickness at 45 points and the determination of the ratio wet to dry sediments weight.
Abstract: Caldeiras da Ribeira Grande fumarolic field is located in the Fogo Volcano complex, Sao Miguel Island (Azores Archipelago, Portugal). These are associated with a geothermal system of high enthalpy that allows the existence of singular thermal muds or peloids that are continuously mixed with water inside a manmade pool. The peloids produced by the maturation (mixture) in situ are extracted from this boiling-mud pool and used directly in a local thermal centre (the “Banhos da Coroa” centre), which exists since 1811, for the relief of pain associated with rheumatic diseases and skin disorders treatment. Until this investigation, the application of sediments from Ribeira Grande for pelotherapy ends was only evaluated by human perception. Thus, this work aims the physical, mineralogical and geochemical characterization of the peloids collected inside the boiling-mud pool and the evaluation of their potential to be used for aesthetic and therapeutic purposes. The assessment of the volume of clays available for exploitation is also estimated. Sediments from Caldeiras da Ribeira Grande are naturally heated (above 36 °C in most of the cases) and present pH up to 5. The X-ray fluorescence analyses revealed a high content on Si and S, which are useful for therapeutic purposes and the risk inherent to potential toxic elements’ concentrations was evaluated. The X-ray diffraction data showed the presence of clay minerals, sulphates (alunite) and feldspars. Additionally to these features, silty-clay fraction also exhibits interesting features, such as suitable abrasivity and high plasticity. A detailed field survey was carried out at the Caldeiras da Ribeira Grande boiling-mud pool, including the measurement of the sediments thickness at 45 points and the determination of the ratio wet to dry sediments weight. This allowed to estimate a volume of sediments available for exploitation of 84 m3, or about 36 ton of dry sediments.
11 citations
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TL;DR: Sensitivity analysis revealed that the sources of "diesel vehicular emissions, "biomass/biofuel burning" and "solvent usage 1" had low uncertainties whereas "gasoline evaporation" showed the highest uncertainty.
191 citations
TL;DR: A photochemical trajectory model coupled with the Master Chemical Mechanism (MCM) describing the degradation of 139 volatile organic compounds (VOCs) in the troposphere was developed and used for the first time to simulate the formation of photochemical pollutants at Wangqingsha (WQS), Guangzhou during photochemical pollution episodes between 12 and 17 November, 2007 as discussed by the authors.
97 citations
TL;DR: In this paper, the pore characteristics of activated carbon nanofibers (ACNFs) were analyzed for toluene adsorption, and it was shown that ACNF has higher specific surface area and larger narrow micropore volume than other ACNFs.
71 citations
TL;DR: In this article, the feasibility of developing eco-friendly geopolymers using ground mixed recycled aggregates (GMRA) was investigated and both compressive and flexural tests of GMRA based geopolymer were conducted.
70 citations