Estudo do comportamento ao fogo de concretos de base biológica aplicados no setor da construção civil
Nowadays, the construction field is still a big producer of carbon dioxide, being this field responsible for a quarter of the total emissions of greenhouse gases. In order to minimize this problem, in the south of France, local materials with low carbon impact are being developed for construction...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/50546 |
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| Resumo: | Nowadays, the construction field is still a big producer of carbon dioxide, being
this field responsible for a quarter of the total emissions of greenhouse gases. In order
to minimize this problem, in the south of France, local materials with low carbon impact
are being developed for construction in straw, hemp and even sunflower bales. These
bioresources, as well as others, are mixed with a binder (lime, gypsum or earth) to
produce light mixtures, called biobased concretes. However, the fire behavior of these
mixtures, especially aspects related to their contribution to fire propagation, is an area
still lacking in studies and, therefore, the main focus of this work. In order to
understand the fire reaction of these concretes, it was proposed to find parameters to
predict the flammability of these materials. Therefore, bomb calorimetry and
combustion microcalorimetry tests were carried out to measure the amount of energy
released during the combustion of these biobased concretes, as well as the Calvet
calorimeter was used to analyze the endothermic processes of binders. From the
results obtained, the study of the energy balance of the combustion process of biobased concretes was carried out and it was possible to find a relevant parameter to
the understanding of the flammability phenomenon of these concretes: the ratio
between the exothermic contribution (energy released) and the endothermic
contribution (energy absorbed) of these materials during their burning. |
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