771 resultados para Construção civil : Materiais : Lodo : Utilização


Relevância:

100.00% 100.00%

Publicador:

Resumo:

A presente dissertação de Mestrado em Estudos Regionais e Locais aborda o papel do Centro de Informação Popular de Machico (CIPM), entre 25 de Abril de 1974 e 25 de Novembro de 1975. Este agrupamento, surgido logo após o 25 de Abril, constituiu uma associação revolucionária, contribuindo para a transformação sócio-económica e político-cultural de Machico, através da difusão dos ideais da Revolução do 25 de Abril e da dinamização da comunidade local e regional, à luz desses novos valores. O CIPM foi um promotor e organizador de várias intervenções, nomeadamente, na alteração da gestão municipal, na extinção da colonia, na melhoria das condições de vida de diversos sectores profissionais, como as bordadeiras, os trabalhadores das conservas, os baleeiros, os operários da construção civil e os trabalhadores da hotelaria, bem como desenvolveu um conjunto de actividades educativas e culturais. Esta investigação permitiu concluir que o CIPM foi um agente decisivo para a expansão dos ideais da Revolução dos Cravos, em Machico e na Madeira, apoiando a materialização de um grande número de mudanças e impulsionando a instauração da prática democrática, quer a nível local, quer a nível regional.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Inúmeras estruturas de concreto no Brasil e no mundo estão atingindo o limite de sua vida útil projetada, completando um ciclo de cinco ou mais décadas de uso e operação. Além das estruturas mais antigas, existem ainda estruturas com reduzido tempo de serviço, e qualidade discutível, que já apresentam patologias em estado tão avançado que chegam a comprometer o seu desempenho. Vindo ao encontro dessas necessidades e no sentido de contribuir para o avanço científico e tecnológico do setor, este trabalho apresenta um método para dosagem, preparo e aplicação de argamassas de alto desempenho para recuperação de estruturas deterioradas, além de sugerir procedimentos para a realização desses reparos, fomentando a cultura das manutenções preventivas e desmistificando a complexidade atribuída a tais operações. Para tanto, foram realizados ensaios mecânicos, microestruturais e relacionados à durabilidade em corpos-de-prova moldados com sílica ativa e látex de estireno-butadieno. Os resultados indicaram que a adoção desses ingredientes, na composição da argamassa de reparo, provocou uma redução significativa da permeabilidade total e descontinuidade de poros, assim como promoveu uma melhor integridade dos constituintes da argamassa, traduzindo-se em uma ampliação, expressiva, das suas capacidades mecânicas. Quando comparada aos produtos industrializados da construção civil, com padrões similares, proporcionou uma economia da ordem de 85%, que permitiria recuperar, com os mesmos custos, quase cinco vezes mais estruturas comprometidas. Este estudo, de viés altamente tecnológico, vem oferecer à construção civil uma argamassa polimérica de alto desempenho, com função reparadora e custo mais acessível, que pode ser adotada em canteiros de obras, implementando ações de natureza sustentável e ainda atendendo às atuais exigências elencadas pela literatura, relacionadas à desempenho, vida útil e durabilidade das estruturas reparadas.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The housing boom recorded in recent years in the city of João Pessoa contributed decisively to the increase in housing supply across the all territory. This advance, however, was accompanied by a significant increase in property prices, which in itself generates enormous expectations on the support of the same medium and long term. From this apparent frame heating the housing market of this Capital. This study empirically examined whether this enhancement configured a typical process of bubble formation between the years 2009 and 2013 in this part of Capital. The empirical price dynamics of the housing market , was based on the indicators of price, rent and cost developed by Bezerra et al. (2013). The results of these local indicators increase the degree of confidence in the hypothesis seen, whatever, that the movement of prices in the main districts of the city of João Pessoa is a real estate bubble

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Although efficient from a technical point of view, mortar layers that make up the traditional masonry coating (slurry mortar, plaster and plaster) have to be in contradiction with the new construction technologies and more efficient methods of consumption and work rationalization. From an environmental point of view, the recovery of waste into new composites for the building has been a growing strand of studies in the scientific community, may prove to be a cost-effective solution in some cases. Thus, this research proposes the development of a mortar Decorative Coating Monolayer (RDM), for use in facades, produced on site, incorporating tempered glass waste (RVT) in the cement matrix, as a partial substitute for aggregate. Therefore, we adopted the binder respect / aggregate of 1: 6 (by volume), consistency index 250mm ± 20, sand substitution levels of glass waste 20%, 50% and 80% and relative water / cement varied in many traits. Two additives were used, a polymer, styrene-butadiene-based, and other chemical, besides mineral and silica fume inorganic pigment in colors red, yellow and blue. Mechanical tests were carried out on fresh pasta and hardened, as well as for the applied coating on masonry, so as to demonstrate the feasibility of the material. In addition, it verified the adequacy of the RDM built environment by means of thermal tests. The results demonstrated the feasibility of the proposed RDM with significantly higher values when compared to norms, especially the dash-added replacement content of 20% and addition of pigment in red. Therefore, the study shows the scientific community as an incentive to the use of technological innovations in construction, increasing the range of alternatives available for housing production, with the proposition of a material that achieves the desired functionality and obtain environmental gain, and may be adopted on construction sites as an alternative industrialized mortars.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Natal, como outras cidades metropolitanas brasileiras, sofreu nas últimas décadas uma forte transformação impulsionada pelo mercado imobiliário e pela indústria da construção civil. A produção de apartamentos em condomínios fechados vem crescendo e tornando cada vez mais comum, no cenário urbano, a presença de torres residenciais (com extensos muros e grades, fachadas cegas e guaritas) que favorecem o “desurbanismo”. Por outro lado, este tipo de empreendimento, o edifício multifamiliar, apresenta plantas baixas padronizadas as quais frequentemente são incoerentes com a diversidade de perfis dos usuários. A consequência disso são reformas e adequações nos apartamentos após a entrega da obra. Diante deste contexto, elaborei uma proposta arquitetônica, que é apresentada nesta dissertação, como alternativa a essa modalidade de produção que está se tornando dominante no Brasil e em outros países. Dois conceitos nortearam esta proposta: a) o conceito de urbanidade cujo objetivo no projeto arquitetônico é favorecer a percepção do outro (por copresença e/ou cociência) através da permeabilidade, acessos e passagens entre o edifício e o entorno. A maneira como os cheios (barreiras) se estruturam com os vazios foi trabalhada de modo que definissem propriedades espaciais cuja intenção é facilitar o encontro e a diversidade entre moradores e entre estes e os de fora, no entanto sem desconsiderar o problema da violência urbana e, consequentemente a importância da promoção de segurança para os usuários. b) o conceito de flexibilidade a fim de possibilitar ao consumidor final o desmembramento da unidade habitacional em duas e, em especial, a participação e ou escolha na concepção do arranjo interno e da definição dos acabamentos do seu apartamento. Tudo isto durante a construção do empreendimento e ao longo da sua vida útil, favorecendo assim o potencial de diversidade (grupos sociais), adaptabilidade a fases distintas da vida e durabilidade do edifício.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The increasing prevalence of Repetitive Strain Injury / Work-Related Musculoskeletal Disorders (RSI / MSDs) has been explained by changes in the work that has been characterized by setting goals and productivity. This fact does not take into account the psycho-physiological characteristics of workers who become ill as a result of professional activities engaged in and also the adverse conditions in which his work was done. This study aimed to analyze the RSI / MSDs reported in the state of Rio Grande do Norte, Brazil, 2010-2014 compared to the profile of the population, epidemiological aspects and features of these diseases. It is a descriptive epidemiological cross-sectional study using secondary data obtained in the Notifiable Diseases Information System (SINAN) in May 2015 was used as the area covered by the Rio Grande do Norte. Data were collected regarding the grievances of work-related RSI / MSDs, assigned by the Worker's Health Reference Center (CEREST) of the State Health Department. Data were processed with the help of Microsoft Excel® 2013 and presented in tables in absolute frequency (n) and relative frequency (%). The results showed a total of 403 notifications of RSI / MSDs, where the vast majority 72% (290) was recorded in Natal. Regarding the profile of notified employees, 88.59% (357) have aged between 25 and 54 years, 62.78% (253) were female, and in relation to education, 31.51% (127) had high school complete. The most affected occupations were seamstresses (the clothing industry) with 24.97% (97), followed by masons, construction with 3.23% (13) and cashiers with 2.99% (12). About the work situation, 75.93% (306) had a formal contract, however, were sent to Communications Occupational accidents (CAT) only 67% (270) of the cases. Regarding the signs and symptoms, pain and limitation of movement were the most mentioned respectively with 98.01% (395) and 95.04% (383) of notifications. Notifications, 94.29% (380) showed exposure to repetitive movements in their workplace. The most frequent specific diagnoses were synovitis and tenosynovitis (CID F 65), with 30.02% (121) of notifications, followed by back pain (CID F 54) to 19.35% (78) and shoulder injuries (ICD M 75) with 15.88% (64). They were away from work 81.64% (329) of workers reported with RSI / MSDs. Evolution more prevalent among cases was temporary disability with 75.68% (305). It was concluded that the SINAN is a database of potential to characterize the profile of RSI / MSDs, requiring, however, an improvement in the coverage of records and data quality. In addition, this study reflects the need to implement protection strategies to workers by companies, signaling promotion, prevention and rehabilitation aimed at reducing these injuries and the improvement of occupational health indicators in Rio Grande do Norte.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Diseases and disorders related to work sets up an important public health problem in Brazil and worldwide. However, the reality of these diseases still constitutes a gap with regard to its characterization and epidemiological situation, especially in Brazil. In this context, this study aims to analyze the magnitude of morbidity related to work from the injuries and illnesses reported by Health the Diseases Notifiable of Health of the State Public River Health Department worker Reference Center Information System services Grande do Norte from 2007 to 2014. It is ecological study, quantitative cross-sectional study in which the analysis unit of the municipalities of Rio Grande do Norte. Data were collected from the state base of Diseases Notifiable Information System Centre of the Secretariat of State Workers' Health Reference Public Health of Rio Grande do Norte, between March and June 2015, after the approval of the Committee of Ethics in Research of the Federal University of Rio Grande do Norte, Opinion 014/2014. The population was represented by the universe of cases of diseases and disorders related to work that were reported and shut down the system from 2007 to 2014. Data were analyzed using descriptive and inferential statistics, presented in tables, graphs, charts and figures. For this, we used the Microsoft Excel 2007 and SPSS version 20.0. To check the significance level we opted for the application of the chi-square or Fisher tests. We adopted the significance level of p <0.05. Of the 10,161 cases of diseases related to the reported work, the biological work accidents had the highest percentage (52.84%) followed by serious occupational accidents (37.49%). For diseases, the highlights were musculoskeletal (4.82%), mental disorders (2.19%) and exogenous intoxication (1.97%). Among men, there was a predominance of major accidents (91.80%), mental disorders (70.00%) and exogenous poisoning (52.84%). Women were most affected by biological accidents (77.50%) and musculoskeletal diseases (64.10%). Among workers who have suffered injuries predominated mulatto (%), mean age of 35.86 years, low education (%) and workers in the formal sector (%). Among the accidents, biological (n = 5,369) accounted for 52.84% of cases occurred predominantly among nursing professionals (48.31%). The percutaneous exposure was the most frequent (73.05%) and the occurrence of circumstances was improper disposal of sharps (45.28%), the needle the most common agent (66.62%) and the organic material was blood (72.99%). Most injured workers were vaccinated against hepatitis B (68.13%), but no information as to the assessment of the vaccine response. In the course of the disease predominated ignored the situation with loss of monitoring of clinical follow-up (55.62%). There was also an increase in the notification of serious industrial accidents predominantly male (91.80%) workers aged 25-44 years (54.3%) and typical accidents (76.3%). The temporary disability was the most common outcome (55.53%) and hand the most affected part (33.00%); the mining and construction industry had the highest number of cases (25.1%) in registered employee (34.2%). The findings of this study show a positive result in relation to increased mandatory reporting of injuries and illnesses related to work together to health services that meet victimized workers, towards the occurrence of knowledge of these accidents for decision making in public plans and policies of health. However, the information system still needs improvement in both the coverage and the quality of the data to demonstrate with greater reliability the magnitude of events to support the planning of workers' health into shares in the state.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

O presente relatório refere-se à prática de ensino supervisionado no âmbito do mestrado em Educação Pré-escolar e Ensino do 1º CEB. Está dividido em duas partes: a dimensão reflexiva, onde falo das experiências mais significativas vividas em cada contexto da prática pedagógica, bem como realizo uma reflexão sobre o perfil do professor reflexivo e investigativo. A segunda parte, refere-se à dimensão investigativa, estando subdividida em quatro capítulo. Ao longo da dimensão reflexiva abordo quatro tópicos que são transversais a todos os contextos onde realizei as práticas pedagógicas: a elaboração das planificações, a construção dos materiais, a gestão do grupo e a implementação das tarefas. A segunda parte deste relatório, corresponde à dimensão investigativa, e foi desenvolvida a partir da seguinte pergunta de partida: “Qual o contributo da matemática no desenvolvimento da capacidade de trabalhar cooperativamente?”. Definiram-se então os objetivos de investigação e fundamentou-se teoricamente o trabalho realizado e as opções metodológicas. Esta fundamentação assentou em quatro pilares chave: o papel da matemática no 1º CEB; a comunicação matemática e as interações; a aprendizagem cooperativa em contexto educativo e por último, a aprendizagem cooperativa em matemática. A metodologia utilizada foi de carater qualitativo, desenvolvendo-se um estudo descritivo e interpretativo. Este consistiu na proposta de um conjunto de tarefas matemáticas a serem desenvolvidas através do trabalho cooperativo, numa turma de alunos do 4º ano de escolaridade. Os principais resultados obtidos mostram que as aulas de matemática podem ser o motor impulsionador do desenvolvimento da capacidade para trabalhar cooperativamente, despertando o sentido de interdependência, de colaboração e interajuda entre os alunos.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Atualmente, a internacionalização é uma estratégia adotada por muitas empresas, independentemente da sua dimensão com o intuito de enfrentar o abrandamento económico no seu mercado doméstico e impulsionar o seu crescimento. No caso das PME, as principais razões que as levam a sair do seu mercado doméstico e a arriscar em mercados externos prendem-se com motivações reativas e muitas vezes exógenas, como sejam a saturação do mercado doméstico, as pressões da concorrência e as relações com os clientes. Assim, a crise financeira no país, aliada à crise no setor da construção civil, leva esta PME portuguesa, do ramo da carpintaria de limpo, a procurar novas oportunidades no exterior. No entanto, como tem consciência da falta de experiência e conhecimento nos mercados internacionais, começa por abordar os mercados numa lógica de procura de novas oportunidades, aproveitando as oportunidades que lhe são dirigidas e vendo nestas uma forma de aprofundar relacionamentos e ganhar experiência neste âmbito. Posteriormente, este conhecimento e experiência permitir-lhe-á enveredar por uma estratégia de internacionalização mais ativa, abandonando/diminuindo a lógica de oportunidade e apostando numa lógica mais estruturada e planeada. Este trabalho, ao tirar proveito de um único estudo de caso, pretende analisar a perspetiva evolutiva da empresa, e como uma estratégia empreendedora, a confiança e a incorporação em redes de relacionamentos facilitam o processo de abertura aos mercados externos.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Recent studies concerning the landscape have investigated the most important activities that contribute for its modification and have tried to better understand the society through the marks left by its quotidian. It is understood that singular landscapes constitute the cultural patrimonies of the cities, once they are part of the daily life of the citizens and are present in their social representations. Some contemporary authors defend the preservation of the natural and urban landscape trying, specially, to keep its importance for the local population. Natal is a city where the ambient qualities are well defined and known by the beauty of the area where it is located. Situated just between a river and the sea, the city grew following its geographic characteristics. The Potengi River, the Atlantic Ocean and the vast dunes ecosystem represented natural limits to the urban expansion; at the same time they have favored the development of a landscape pattern marked by the dialectic between the natural elements and the human interventions. However, this relationship changed after the intensification of the high rising development process that took place since the 1960s. The urban legislation tried to preserve the features of the local landscape delimiting Areas for Controlling Building High , destined to protect the scenic value of some parts of the city. On the other hand, the civil construction sector has made constant pressure in sense to abolish or to modify this legal instrument, aiming profits that have increased, in the 1990s, because of the consumption and the qualification of the urban space for tourist activities. It is necessary the raising of new elements to stimulate the quarrel about the landscape preservation, the process of the urban space production and the best way for the legislation implementation. This work tries to raise elements about the subject at local level, in sense to use Natal City experience to contribute for the formulation of indicators to raise the question about the lack of measure for subjective values, for example the cultural and affective value of the landscape. The natural elements inserted in the urban profile, represent strong visual references and supply identity to the town; they are part of the collective imaginary and are detached in the social context of the city. Then, why the preservation of the landscape, that estimates the improvement in the quality of life, is not enough to justify the controlling building high already previewed as part of Natal City Legislation? These questions send us to the approach of the landscape, as a community patrimony, alerting that some of its significant esthetics attributes must be preserved as a legacy for the future generations

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Nowadays the acquisition of sustainable elements and concepts in construction has been increasingly discussed, improved and incorporated to buildings, since the sector directly interferes in the urban space and environment, representing environmental impact. In order to make a sustainable building (Green Building) it is vital to incorporate less damaging constructive practice, starting from the project until the operation of the enterprise, that means to consider an integrated process of conception, implementation, construction and operation. The more effective sustainable principles participation in architecture happens at the projecting step through minimal environment impact solutions. Among the issues varieties that goes with sustainability proposal of the buildings project, there were added to this work the elements that are directly attached to bioclimatic architecture, more specifically the climate variation, ventilation, lighting and sunlight, that directly affect the project conception. It is important to put in evidence that architecture role goes far beyond the simple activity of building spaces; it is the sequence of political, economic, social and cultural elements, having the users as the main apparatus to its materialization. Thereby this professional dissertation consists of an architecture draft for a professional and technological school in the Rio Grande do Norte State, this dissertation is based on the analysis of previous experience and the bioclimatic principles that implicate in building on hot and dry, hot and humid climates, and the use of strategic solutions that aim the optimization of natural light and ventilation

Relevância:

100.00% 100.00%

Publicador:

Resumo:

Relatório de Estágio para obtenção do grau de Mestre em Engenharia Civil na Área de Especialização de Edificações

Relevância:

100.00% 100.00%

Publicador:

Resumo:

O presente trabalho tem como finalidade traçar um perfil para o trabalhador insatisfeito do Rio Grande do Sul a partir de variáveis socioeconômicas ligadas às características pessoais, do núcleo familiar e do posto de trabalho do indivíduo. Para a realização deste objetivo, de acordo com os estudos já realizados dentro da literatura de “job satisfaction”, utilizou-se modelos econométricos de resposta qualitativa, o LOGIT e o PROBIT, para a obtenção da probabilidade de o trabalhador gaúcho estar ou não insatisfeito levanto as variáveis independentes selecionadas. A amostra foi construída a partir de dados fornecidos pela Pesquisa Anual de Amostra por Domicílios, a PNAD, dos anos de 2009, 2011 e 2012, excluindo-se o ano de 2010 no qual a PNAD não foi realizada. Os modelos estimados apresentaram bom ajustamento e resultados similares, apontando o perfil do trabalhador insatisfeito gaúcho como sendo aquele indivíduo que é negro, chefe de família, com baixa escolaridade e renda, residente da área urbana, que possui renda provenientes de outras fontes que não o trabalho, trabalhadores do setor informal e de áreas como a construção civil, comércio e serviços.

Relevância:

100.00% 100.00%

Publicador:

Resumo:

The supersulfated cement (CSS) basically consist of up to 90% blast furnace slag, 10-20% of a source of calcium sulfate and a small amount of alkali activator, covered by European standard EN 15743/2010. Because of this SSC are considered "green cement" low environmental impact. The source of calcium sulfate used in the preparation of CSS can be obtained from natural sources, such as gypsum or from alternative sources (industrial products), such as phosphogypsum. The phosphogypsum is a by-product of the fertilizer industry, used in the production of phosphoric acid. In this process the phosphate rock is treated with sulfuric acid to give as the major product phosphoric acid (H3PO4), gypsum and a small amount of hydrofluoric acid. The chemical composition of gypsum is basically calcium sulfate dihydrate (CaSO4.2H2O), similar to gypsum, because it can be used in this type of cement. To become anhydrous, the calcination of gypsum is necessary. The availability of the source of calcium sulfate to react with the slag is dependent on its solubility that is directly related to its calcination temperature. The solubility of the anhydrous gypsum decreases with increasing calcination temperature. This study investigated the influence of temperature of calcination of phosphogypsum on the performance of CSS. Samples were prepared with 10 and 20% of phosphogypsum calcinated at 350 to 650 ° C using KOH as an alkaline activator at three different concentrations (0.2, 0.5 and 0.8%). The results showed that all mortars presented the minimum values required by EN 15743/2010 for 7 and 28 days of hydration. In general CSS containing 10% phosphogypsum showed slightly better compressive strength results using a lower calcination temperature (350 °C) and curing all ages. The CSS containing 20% of calcined gypsum at 650 °C exhibit satisfactory compressive strenght at 28 days of hydration, but at later ages (56 to 90 days) it strongly reduced. This indicates that the calcination temperature of phosphogypsum has a strong influence on the performance of the CSS.