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Advisor(s)
Abstract(s)
Os sectores da construção e demolição de edifícios são responsáveis por um elevado volume de
produção de resíduos. Estes resíduos são normalmente direcionados para aterros, que se
encontram, neste momento, sobrelotados. Esta falta de capacidade de receção de resíduos tem
como consequência imediata o aumento dos valores monetários associados ao depósito destes
materiais excedentários. Com a elevada produção destes resíduos torna-se importante a sua
reciclagem e reutilização. No caso da Engenharia Civil, uma grande produtora de resíduos, seria
ainda mais interessante o seu reaproveitamento imediato na área.
Nesta investigação, pretendeu-se avaliar o desempenho mecânico de betões com diferentes
percentagens de agregados cerâmicos vermelhos. Essa investigação passou numa fase inicial
pelo estado fresco do betão, de forma a analisar a sua trabalhabilidade. Na fase seguinte,
analisou-se no estado endurecido, a resistência à compressão e resistência à tração por
compressão diametral.
Para concretização deste objetivo produziram-se três tipos de betões: um de referência (areia
fina e brita fina), um betão com incorporação de agregados finos e grossos de cerâmica
vermelha, juntamente com a areia fina e a brita fina, e o terceiro, um betão com a substituição
total da areia fina por cerâmica fina.
A realização desta investigação, demostrou que os betões com a incorporação de agregado
cerâmico vermelho apresentam resultados de boa qualidade, sendo plausível a sua utilização
em estruturas.
The sectors of construction and buildings demolition are responsible for the production of a large volume of waste. These residues are usually conducted to landfills that are starting to run out of storage capacity. The reduction of space availability on the landfills, increases, of course, the monetary values invested to ensure this practice. Recycling and reuse are becoming more and more important in order to minimize the landfill usage. Civil Engineering as a major residue production industry has a priority interest in reutilizing immediately some of its own leavings. In this study, it was intended to evaluate the mechanical performance of concrete with different percentages of red ceramic aggregates. In an earliest stage, this research began to study concrete at its fresh status in order to analyse its workability. In the following phase, concrete was analysed also in its hardened condition by measuring the compressive strength and tensile strength by diametrical compression. To achieve this proposed goal, it was produced three different types of concrete: a reference one (with fine sand and pea gravel), other concrete incorporating fine and coarse aggregates of red ceramic (together with fine sand and pea gravel), and a third one with total replacement of sand for fine ceramics. The realization of this research verified that concretes that incorporate red ceramic aggregates present good quality testing results and they are plausible to be used in structures.
The sectors of construction and buildings demolition are responsible for the production of a large volume of waste. These residues are usually conducted to landfills that are starting to run out of storage capacity. The reduction of space availability on the landfills, increases, of course, the monetary values invested to ensure this practice. Recycling and reuse are becoming more and more important in order to minimize the landfill usage. Civil Engineering as a major residue production industry has a priority interest in reutilizing immediately some of its own leavings. In this study, it was intended to evaluate the mechanical performance of concrete with different percentages of red ceramic aggregates. In an earliest stage, this research began to study concrete at its fresh status in order to analyse its workability. In the following phase, concrete was analysed also in its hardened condition by measuring the compressive strength and tensile strength by diametrical compression. To achieve this proposed goal, it was produced three different types of concrete: a reference one (with fine sand and pea gravel), other concrete incorporating fine and coarse aggregates of red ceramic (together with fine sand and pea gravel), and a third one with total replacement of sand for fine ceramics. The realization of this research verified that concretes that incorporate red ceramic aggregates present good quality testing results and they are plausible to be used in structures.
Description
Keywords
Agregado cerâmico vermelho Betão Resíduo Desempenho mecânico Red ceramic aggregates Concrete Waste Mechanical performance