Repositório RCAAP

The present work searchs to trace a diagnosis of the main irregularities practised in the transport of dangerous products through an analysis of the main irregularities practised in the federal highways, using as tool the statistical data raised together to the Federal Road Policy and the depositions of a sampling of Policemen who had contributed with its practical experiences. Aiming at to interact the three involved segments, or either, dispatcher, transporter and fiscalization, workshops still searched the manifestations presented in two that they had counted on the participation of the legislators of the ANTT, technician and entrepreneurs of the transport sector. Statisticians prove that the road transport of dangerous products has generated diverse risks to the man and the environment, having caused material damages, as well as the a health and to the life. Being common to identify the practical one of the transport of these products without the fulfilment of the effective legal requirements. Although the legal devices that regulate the subject in question are complex and of matrix strict technician, making it difficult its interpretation on the part of the operational user, the results had demonstrated that the practised irregularities more are related the operational deficiencies, being distinguished with bigger amount of cultivated fines, representing 38%, the applied ones to kits of emergency and identified EPI's being as more frequent irregularity the lack of some itens that they integrate kits and 26% for the emergency fiches, being more common to find them it are of the standard established for the inadequate norm Brazilian or the carried product.

In recent years the number of the constructed concrete marquees with pathological manifestations has grow in Brazil, and consequences have caused them to be structurally weak, which has generally lead to fatalities. As preventive action, it becomes necessary that the projects and construction thereof be improved in quality, that found pathological causes be corrected to prevent the repetition of the same errors, making sure that there is always a feedback of the system and all necessary maintenance is provided. By project analysis of geometric characteristics of the structure, visual inspection and detailed inspection with appropriate equipments, it can be detected existed anomalies and to made repairs and reinforcement of the structure, or even to indicate it demolition. This work represents the results obtained with the methodological implementation of the use of techniques inspection, norms and regulations that deal with constructed concrete skyways, with concern to guarantee their durability and, consequently, enhanced security for pedestrians. The studies had been carried through in the cities of Bambuí and Uberlândia. In the city of Uberlândia visual inspections of 54 marquees had been made, whereas in the city of Bambuí it became fulfilled visual inspection and inspection detailed in 10 of these structures, being used equipment of rebar locator, ultrasonic testing, measurer of corrosion potential of reinforcing bars and resistivity meter.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

The objective of this paper is to present the results of the connection between a substrate and self-compacting concrete with underwater launch simulating the repairs to concrete structures submerged in various applications. Therefore, we used samples of "old" concrete structures extracted from the Power Plant Itumbiara the state of Goiás, which was considered substrates. The concrete used in this work follows the parameters established strengths in the research completed in 2003 by the laboratory of Furnas Centrais Elétricas and has been adjusted to the materials (gravel and sand) found in the city of the Minas Gerais. The results are from the sample concrete of vertical and horizontal joints of the bodyspecimens prismatic concrete substrates and kept submerged and extracted after a year, so almost complete hydration. The analysis relating to the launch of concrete indicate that it is entirely feasible production for small applications. Visibility during the concreting was hampered by increased turbidity of the water produced by the concrete, so you must reduce the presence of a direct flow of water in concrete. The analysis was by comparing the results of the testimonies and bodies-of-proof. We observed an increase in strength in direct relation to the diameter of the testimony. In the samples concrete of 50 mm x 100 mm was obtained a coefficient of variation of 9.00% giving the concrete a low variability. The testimonies of concrete compounds and submerged concrete substrate (with seal inclined) had a resistance value 84% over the bodies-of-proof. The tensile strength by diametrical compression of the testimony amounted to 54% of the reference value. Can also check the interface between substrate concrete and after the break.

This work presents a study on a network of environmental monitoring of the element fluorine in the municipality of Araxá, MG. We used two methods: through active biomonitoring Lollium multiflorum cv: Lema and alkaline plates, a physical-chemical monitoring. The network is monitored 21 points, each point with three pots with three plants and alkaline plates. Every 14 days of exposure, consecutively and continuously, were collected plants and alkaline plates to obtain the results. The results of alkaline plates but also of plants were arbitrarily classified: very low, low, medium, high and very high. For the subsequent data processing was done for the two statistical methods used. Both methods have tracking statistical comparisons taking into account the whole network on the classification used, and then all points of the network against the other. This last application statistics led us to find the equality of responses: 49 in biomonitoring and 79 in plate alkaline. Although more detailed evaluations in the monitoring network was ranked side in their positions: NW, NE, SW, SE, and avoiding injury recomparada comparisons between the different classifications of points in different positions. Therefore, 5 points were able to be subtracted from the network without prejudice to the monitoring application: Currency (DIV), Eucalyptus 7 (EP7), Dam B5 (BB5), the Massif B2 (MB2), reducing the network by 5 points. The database assembled with weather information and production was able to explain the results of the behavior of F in plant tissue (mg/kg): CB4 (R2 = 0.87), CEA (R2 = 0.60), BRS (R2 = 0.80), PRE (R2 = 0.84). The biomonitoring system shows, as the main environmental variables can interfere in the presence of F in the atmosphere: air humidity, rainfall and wind.

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

The Southwest of the Brazilian State of Minas Gerais is nationally known by the production of quartzite used as floor and wall covering. The extraction of the quartzite in the region, even when obey the determinations of the ambient agencies, generates a great amount of waste. The waste generated in the extraction and processing of the slates is an enormous problem for the society. The objective of this research is to characterize the quartzite waste to verify the possibility of its use as concrete coarse aggregate. The work concerned the definition of the places and the collect of the samples, samples petrographic appreciation, production of aggregates, samples technological characterization and confection of the concrete in laboratory. The results obtained in the technological characterization of the quartzite samples and of the concrete had been satisfactory, with exceptions in the elongated and flaky fragments by use of the jaw crusher for processing and of the potential deleterious reactivity of the quartzite with the alkalies in the cement CP II-Z-32 and CP V.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Mestre em Engenharia Civil

The objective of this work is to study the external reinforcement of concrete slabs, using Carbon Fiber Reinforced Polymers (CFRP), through numerical simulations and topology optimization. The topology optimization enters as a tool for determining the optimal distribution of the reinforcement. Due to the high ratio strength / specific weight of CFRP, we can increase the strength and stiffness of structural elements without significant increase in the weight. The simulations were performed by using Finite Element Method. Several geometric configurations, boundary conditions and loading were analyzed. The cracking of the concrete was considered in the analysis, because this effect influences the structural behavior of the slab. For some cases of concrete slabs, the reinforcement was calculated in the Ultimate Limit State, in order to compare the conventional and optimized distributions. Gains in terms of stiffness and strength of the reinforced piece have been verified. Comparison with conventional method shows that the use of topology optimization can lead to an economy of reinforcement material, with the same structural performance.

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Fundação de Amparo a Pesquisa do Estado de Minas Gerais

The meaning of this work is to characterize the erosion feature at Campo Alegre stream, trough geological and geotechnical by categorizing essais the physical environment attributes and determining geotechnical parameters and also geoprocessing to be possible match this analysis and get to the factor of development and evolution of erosion.This research is justified by the similar situation at several streams in Uberlândia, both erosive processes as landscape configuration process. Were produced 4 soil profiles and in each 5 soil levels, except profile number 3 with 3 levels. From these 4 profiles, were taken several disturbed and undisturbed samples and made the following essays: Granulometria, Limites de Atterberg, Permeabilidade in situ, adensamento, cisalhamento, erodibilidade and adsorção de azul de metileno. Were prepared hypsometric maps and slope maps, produced based on the topographic map.Results showed that the soil is silty-sand and with low cohesion, therefore loses more easily the soil of lowest levels of the profiles. The highers levels are less erodible and get easily amount cause of organic materials, thus acquire a greater aggregation and yield and lack of bases being transported by the stream. The destination of rain water coming from the neighborhoods in the headwaters of streams, enhances the water volume in the channel by the increasing os mechanical action of water that has a large power on carring materiais used to backfill the erosion. In the medium course of the stream right arm channel has a meandering course to the right and due to the transportation of lowest levels and bases it has started a piping process and collapse on the surface by the lackinf of support, characterizing this area as the highest intensity of erosion.The blocks keep falling depositing more material to be transported as the next rainy season and again release the latest levels to be removed by pipping.

The correct solid waste management has been a challenge to most cities in Brazil that have to dispose of this waste in an environmentally correct way, trying to comply with legal demandings. The landfills are the most adequate way to dispose of urban solid waste, avoiding contamination of ground and underground water, soil and air, besides preventing disease vector proliferation. Even though there are many studies over landfill monitoring in operation, there is not in the same proportion in Brazil studies over the closure and postclosure of landfills and it is known that even after their deactivation, the waste degradation continues generating percolate liquids and cotaminating biogases, besides the movements of different nature over the landfill, which makes it necessary the follow up of this area until the waste is stabilized. The major current problems in finished sanitary landfills were listed, and from this point, the Technical Manual on Preventive and Corretive Measures for Landfill Closed . In this dissertation, five action programs concerning sanitary landfills were presented: Environmental Adequation Program, Environmental and Geothecnical Monitoring Program, Environmental Education Program, Safety Program, and Personal Training Program. With this the intention is to raise more discussions over this issue and moreover, to draw the attention to the dangers concerning the bad management of landfills after their closure.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior