Navegando por Autor "FERREIRA, Taiza Naiana da Silva"

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Acesso aberto (Open Access)
Propriedades mecânicas e durabilidade do concreto branco com adições pozolânicas
(Universidade Federal do Pará, 2014-03-26) FERREIRA, Taiza Naiana da Silva; PAES, Isaura Nazaré Lobato; http://lattes.cnpq.br/3432832117667434
The present work aims at investigating the behavior of White Portland cement concrete with addition of metakaolin and silica fume, evaluating the mechanical behavior, the behavior regarding water absorption and porosity level and durability in concrete with this binder. For this purpose, assays were performed in plastic state (consistency and density) and hardened (compressive strength, diametral tensile strength by, modulus of elasticity, water absorption, carbonation and penetration of chloride). Reviews of its compressive strength and tensile strength at the ages of 7 and 28 days by IPT/EPUSP method that uses traces 1:5, 1:3.5 and 1:6,5 were performed. The modulus of elasticity at 28 days. Besides these permeability was evaluated by absorption test; through accelerated durability testing of chlorides and carbonation, porosity was verified by carrying out the scanning electron microscopy. In general, it was found that even the resistance of concrete with the lowest aggregate/binder (poor trait), the proportion is above the more usual resistance in the metropolitan region of Belém which is around 25-30 MPa, whereas white cement used is structural, so it is justified to reach these values even with poor trait. With regard to permeability, the results demonstrated that as resistance, this is dependent on the type of cement used and the additions used. The highest permeability values were obtained in specific reference (without addition). To study the porosity was seen that concrete reference presents more compact and less noticeable pores, especially those with higher aggregate/binder ratios. Already in the micrographs of CMT concrete and CSA, you can see a smaller amount of pores in the region occupied by folder Finally, a comparison was made of the mechanical properties, water absorption capacity and porosity of white Portland cement (CPB).
Acesso aberto (Open Access)
O Uso de polímeros reciclados na construção civil: uma proposta de habitação sustentável
(Universidade Federal do Pará, 2023-02-01) FERREIRA, Taiza Naiana da Silva; DIAS, Carmen Gilda Barroso Tavares; http://lattes.cnpq.br/2113791118142177
In recent decades, urban development has resulted in the unbalanced production of plastic materials as waste, waste that can be reused as raw material for a new production cycle. This work presents a proposal for sustainable housing with the use of floors, blocks for sealing with thermo acoustic blanket and sustainable tiles. For their preparation, rotational molding and compression molding equipment was assembled. Residues of polymers and natural fibers were used to make these constructive elements. The polymers used for the development of the floor were polystyrene (PS) disposable cups; ecological blocks were modeled and processed from post-consumer polypropylene (PP) and high-density polyethylene (HDPE) packaging; tiles were molded from discarded laminates; the floors became resistant to abrasion due to the presence of babassu fibers. The blocks provided acoustic comfort by including açaí fiber blankets, the walls were assembled using blocks and a commercial product for laying and overlapping. Housing as a model for recycling materials discarded in the environment will be able to generate proper disposal, providing income, increasing the life cycle of these materials, producing ecological products in civil construction and meeting at least four of the Organization's Sustainable Development Goals-SDGs of the United Nations.