Fire Exposure
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Durability of Concrete After Fire Through Accelerated Carbonation Tests
Degradation of mechanical properties and durability of reinforced concrete structures occur when they are subjected to fire situations, depending on the characteristics of the material, fire duration and the ways of fire extinguishing. Mechanical properties such as compressive strength, tensile strength and elasticity modulus are some examples of typically a
Mat. Res.. Publicado em: 18/07/2019
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2. Fire exposure behavior of epoxy reinforced with jute fiber applied to ceramic tiles for a ventilated facade system
Civil construction seeks to increase the useful life of the facades of buildings. Installing a ventilated facade is one way to accomplish this due to aesthetic and technical advantages. Ceramic tiles are the main products used as the covering. To the back face of a tile, a bidirectional screen of glass fiber is adhered using epoxy resin. This set forms a com
Mat. Res.. Publicado em: 18/07/2019
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3. Intumescent Coatings Based on Tannins for Fire Protection
Accidents involving fire occur every day around the world, affecting thousands of people and causing economic losses. Some accidents are caused by steel structure failures, which experience a significant reduction in mechanical properties at temperatures of 400-550˚C. Therefore, fire protective coatings are required for steel structures and interest in the
Mat. Res.. Publicado em: 04/01/2019
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4. Management techniques for the control of Melinis minutiflora P. Beauv. (molasses grass): ten years of research on an invasive grass species in the Brazilian Cerrado
ABSTRACT The invasion of exotic species is considered to be a major threat to the preservation of biodiversity. In the Parque Nacional de Brasília (National Park of Brasília), the invasive Melinis minutiflora (molasses grass) occupies more than 10 % of the area of the park. The present, long-term, study compared two treatments of exposure to molasses grass
Acta Bot. Bras.. Publicado em: 21/09/2017
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5. Do the structures of macaw palm fruit protect seeds in a fire-prone environment?
ABSTRACT Fire is an abiotic disturbance that regulates vegetation structure and biodiversity. Some plant species have adapted to fire prone environments by evolving protective structures. Acrocomia aculeata (macaw palm) is widely distributed throughout tropical America, and is found in environments continuously influenced by anthropogenic fire. We aimed to d
Acta Bot. Bras.. Publicado em: 27/10/2016
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6. The effect of simulated heat-shock and daily temperature fluctuations on seed germination of four species from fire-prone ecosystems
ABSTRACT Seed germination in many species from fire-prone ecosystems may be triggered by heat shock and/or temperature fluctuation, and how species respond to such fire-related cues is important to understand post-fire regeneration strategies. Thus, we tested how heat shock and daily temperature fluctuations affect the germination of four species from fire-p
Acta Bot. Bras.. Publicado em: 05/09/2016
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7. To resist or to germinate? The effect of fire on legume seeds in Brazilian subtropical grasslands
Fire plays an important role in several grassland ecosystems in the world. Fire can trigger germination in several species, by breaking the physical dormancy of their seeds. Thus, we hypothesized that exposure to high temperatures during fire would break seed dormancy and enhance germination. We tested the effect of high temperatures on the germination of si
Acta Bot. Bras.. Publicado em: 2016-03
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8. Fruit biometry and seed germination of Syagrus romanzoffiana (Cham.) Glassm
Syagrus romanzoffiana (Cham.) Glassm. is a species native to Brazil that is of ecological and aesthetic importance. This study aims to describe the biometric characteristics of S. romanzoffiana fruits and to assess the effects that treatments meant to overcome dormancy and partial drying have on seed germination. For biometric characterization, each repetiti
Acta Bot. Bras.. Publicado em: 2013-03
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9. Estudo espaço-temporal da mortalidade e morbilidade por doenças respiratórias no município de Botucatu, São Paulo / Space-time study of moratality and morbidity for respiratory diseases in teh city of Botucatu, São Paulo
An ecological study conducted between the years 2003 to 2010 with monthly data on the number of mortality and morbidity from respiratory diseases, areas for monoculture of sugar cane and spatial distribution of outbreaks of fires in Botucatu, São Paulo. Data were extracted, respectively, of databases DATASUS AND THE Institute for Space Research (INPE). The
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/05/2012
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10. Modelos numéricos de vigas mistas de aço e concreto pertencentes a sistemas de pisos mistos de pequena altura em situação de incêndio / Numerical modelling of composite slim floor beams in fire
Slim floor frames consists on structural system in which the steel beam is completely or partially inserted in a concrete slab, that is usually used in profiled steel decks systems. The main goal of the slim floor systems is to obtain a minimum height of the composite beam section and, consequently, achieve a higher height of the floor or a lower total heigh
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/03/2012
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11. Pilares de concreto armado em situação de incêndio submetidos à flexão normal composta. / Reinforced concrete columns in fire under uniaxial bending.
According to Brazilian Codes, reinforced concrete structures must be verified under high temperatures, in order to assure the load bearing capacity to allow the safe evacuation of the users and the fire fighting and to reduce the fire spread to other compartments. For reinforced concrete structures, the columns must be analyzed carefully. The significant red
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/05/2011
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12. Fatores de risco no ambiente do trabalho de enfermagem em um hospital universitário / Risk factors in the work environment of nursing in a university hospital
This research was carried out in a Rio de Janeiro State University Hospital through a descriptive quantitative approach. The aim of this study was to identify environmental risk factors in nursing professionals work situations from the systematic observation of the workplaces by the health and workplace safety professionals and by the head nurses of a Univer
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/03/2010