Programa de Pós-graduação em Engenharia Ambiental e Sanitária
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Item Resíduos de poli (tereftalato de etileno) e de pneu na confecção de pisos flutuantes para o isolamento do ruído de impacto(Universidade Federal de Goiás, 2009-08-21) CARVALHO, Maria Luiza de Ulhoa; FERREIRA, Regis de Castro; http://lattes.cnpq.br/3206688887219284The demographic growth has created a gain in urban solid waste that deteriorates the citizen s quality of life. High buildings represent the main way for accommodations in big cities for these growing urban populations. However, impact sound insulation has shown itself quite poor. In order to propose an alternative way of minimization to the two problems, residue generation and impact noise, this study aimed to investigate the viability of using poly (ethylene-terephthalate) - PET and rubber tire residues for impact sound insulation in floating floors. Plates of 1 m² with thickness of 1.5 and 2.5 cm to 1:4 and 1:5 (ciment:residue) ratios were molded for the acoustic experiments, as well as portable mortar slabs covered with high and popular quality floor coverings. The main methods used were ISO 140-7 (1998) for measuring the standardized impact sound pressure level, L nT, in one-third-octave bands and ISO 717-2 (1996) to calculate the weighted standardized impact sound pressure level, L nT,w. Both residues presented high sound insulation in relation to their references. It was observed that the results for the PET specimen were superior to those of the rubber tires residue. However, the results among the residues presented different tendencies as their ratio changed. While the impact sound insulation of the rubber tires samples decreased with the increase of residue, PET samples presented more insulation with residue increase. Another observed factor was that the high quality floor covering presented a significant superior impact sound isolation compared to the popular floor covering. Considering all results, it is possible to conclude that the use of the studied residues in floating floors contributes to impact sound insulationItem O uso do pet em telhas translúcidas visando o conforto natural lumínico e térmico(Universidade Federal de Goiás, 2011-09-23) CAVALCANTE, Christiane Rosa de Paiva; FERREIRA, Regis de Castro; http://lattes.cnpq.br/3206688887219284The PET, tereftalato of ethylene, is the most known and appropriated material in the manufacture of several packings of nourishing products, specially the bottles of beverages. The correct management of the urban solid residues to the transformation into those which return to the use and the environment education are essential tasks to guarantee the exploitation of the complete useful life of this material and to prevent it on environmental focus. From the industrial point of view, the PET recycling in Brazil is still a recently activity. All around the country there are recycling industries, but they were created specially for environmental reasons. Although they became an important source of jobs and income. That s why, nowadays, recycling industries are considered an important social order factor. In Brazil, there are industries which transform the PET into roofing tiles for covering for drawing or injection. In this work, the main analyzed topic was the properties of the transparent roofing tiles of PET and other materials, the polycarbonate and the available fiberglass in the civil construction market through the main properties and relative parameters to the natural illumination, including its optic properties and the objective of the luminous and thermal comfort. Using the results of the spectrophotometer device, it was made a comparison among the studied materials in order to help the best choice of luminous and thermal comfort materials. PET, compared to the other studied materials, is not the best choice, even concerned to the price. However, for environmental solutions, the best way to use this solid waste recycling is the utilization of the PET as transparent roofing tiles, specially considering the amount of material all around rivers, scoots, attires, and so on.Item A qualidade do sombreamento de espécies arbóreas e sua influência no microclima do entorno imediato em ambientes urbanos(Universidade Federal de Goiás, 2008-08-13) HERRMANN, Carla Rosana Azambuja; FERREIRA, Regis de Castro; http://lattes.cnpq.br/3206688887219284This research aimed at assessing quality and influence of shadow offered by four selected individual arboreous species (Lophantera lactescens chuva-de-ouro, Caesalpinia peltophoroides sibipiruna, Sapindus saponaria saboneteira e Stryphnodendron adstringens barbatimão) in attenuating environmental variables Dry Bulb Temperature (DBT) and Radiant Thermal Load (RTL) and increasing Air Relative Humidity (ARH) under weather conditions in the municipality of Goiânia-GO, Brazil, in addition to comparing DBT and ARH values with criterion of thermal comfort for hot climates indicated by Olgyay Bioclimatic Letter (1998) and adapted by Koenigsberger. In the course of this research, data concerning the aforementioned variables were collected through four temperature measuring device placed firstly under the tree shadow (1m), secondly, 5 meters far, thirdly, 10 meters far, finally, 15 meters far from the trunk (full sun), from September to November 2007, hourly from 10 o clock in the morning to 2 o clock in the afternoou5yn over three days for each species. Quantifying contribution of shadow in attenuating and increasing environmental variables was carried out through calculation of percentage of Relative Variation of values found in shadow, 5m far and 10m far regarding the values obtained 5m far (full sunlight). Outcomes analysis was carried out regarding the following hypotheses: i) attenuating DBT in shadow > attenuating DBT at 5m > attenuating DBT at 10m; ii) attenuating RTL in shadow > attenuating RTL at 5m > attenuating RTL at 10m and; iii) increasing ARH in shadow > increasing ARH at 5m > increasing ARH at 10m. The outcomes showed positive effects in attenuating DBT and RTL and increasing ARH. The species with better results were Sibipiruna and Barbatimão with better overall scores in attenuating DBT between 5% and 10%, Saboneteira and Sibipiruna in the ARH variable providing increasing higher than 30%, and Sibipiruna in shadow in RTL with attenuation around 15%. The field outcomes compared with comfort criteria demonstrated the influence of the arboreous species studied on microclimate improvement in its surrounding areas.