Mensuração da resistência a compressão e da consistência de concretos produzidos com nanocompósitos de PET reciclado/argila sepiolita

• Autor(a) principal: Dela Justina, Gabriel
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Biblioteca Digital de Monografias da UFMT
• Texto Completo: http://bdm.ufmt.br/handle/1/1976
• topic: CNPQ::ENGENHARIAS::ENGENHARIA CIVIL; concreto; nanocompósitos de PET; argila sepiolita; redução de impactos ambientais; concrete; PET nanocomposites; sepiolite clay; reduction of environmental impacts

The adoption of sustainable policies proved to be of great importance due to the increasing industrialization and the advance of urbanization in cities. Civil construction is one of the areas that most consume natural resources in the world, so one way to reduce the impacts caused by resource extraction without jeopardizing the sector's progress is the partial replacement of natural aggregates by recyclable materials, reducing the amount of resources used and reinserting materials on the market that would be discarded. In this context, the present work aimed at characterizing concretes produced from recycled PET nanocomposites and sepiolite clay, as a way to reduce the environmental impacts caused by both the extraction of resources and by the bad destination of a material with easy recyclability, the PET polymer. For the characterization of the concrete, a partial substitution of 5% of the mass of the fine aggregate by PET residue was made. Four concrete samples (reference, pure recycled PET, PET + 1% sepiolite clay and PET + 5% sepiolite clay) were analyzed and 6 cylindrical specimens were produced for each of the samples, with standardized dimensions of 20x10 cm and with 1:1.96:2.24:0.448. The tests performed were the cone trunk abatement and the axial compression test. After the rupture of the specimens in the axial compression test, it was done at 7, 14 and 28 days of the curing period, breaking two specimens of each sample on each of the determined days. From the results obtained, it was observed that the substitution of PET did not favor the workability of the concrete produced, reducing the slump according to the increase of sepiolite clay concentration in the PET matrix. In the results of the compression resistance test in the first 7 days, it was observed that the substitution with pure PET decreased the resistance by about 6% when compared to the reference. However, the addition of sepiolite clay contributed to the concrete strength, reaching values close to the reference for the 1% content, and for the 5% clay content, the resistance was higher than the reference. Thus, it is concluded that the incorporation of nanocomposites from recycled PET and sepiolite clay in lower levels in concrete is favorable as a way of reusing recycled materials.