Estudos exploratórios sobre propriedades térmicas do compósito cimento-polpa celulósica(CPC)

The search for a more aware use of available raw materials has led to a need to create more sustainable products. The use of natural fibers to reinforce cement, for instance, has been widely studied in the past decades because of the possibility that they can improve material properties such as thermal resistance and to compression, besides conferring a decrease in their total weight. This present study aimed at to conduct preliminary studies on the thermal resistance of the composite cement - Cellulose Pulp, using waste from the pulp and paper industry. Through experiments, it was found that the composite manufactured using the ratio 30 % Portland cement and 70 % pulp, showed satisfactory results regarding its thermal resistance, so it could be considered as a potential thermal insulation material, for use in constructions

Concreto autoadensável utilizando cinza de casca de arroz: estudo das propriedades mecânicas

Pós-graduação em Engenharia Civil - FEIS

Utilização do gesso para fabricação de artefatos alternativos, no contexto de produção mais limpa

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Programa Minha Casa Minha Vida: a construção social de um mercado

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Estudo sobre o uso de agregados reciclados na composição de concretos e argamassas

Two of the major problems caused by construction activity are the production of construction and demolition waste (CDW) and the exploitation of mineral resources, causing big impacts on the environment. Therefore, the recycling has been shown as an alternative to mitigate the harmful effects of waste on the urban environment and prevent the exploitation of new raw materials. This course work aims to study the behavior of recycled aggregates from Vale do Paraíba in concrete and mortar. Initially, it presents the definitions of recycled aggregates according to CONAMA Resolution No. 307/2002, the aggregate settings for concrete and mortar (such as the grain size, its origin and density, and the characterization parameters according to ABNT), and the definition of ACI method of concrete mix design. Afterwards, it presents the characterization of materials separated by assays. After that, it shows the theoretical concrete proportioning applying the ACI method and experimental concrete proportioning. Then, the analysis of results is performed to finally conclude that the materials provided can't be used to replace natural aggregates because they cannot have the same performance. With the studies, it could be observed that the recycled aggregate presents a great complexity and diversity in origin, therefore the form how the material should be handled requires great care

Construção Enxuta e a utilização dos seus conceitos por construtoras paulistas certificadas segundo o PBQP-H e o QUALIHAB

The civil construction sector has been stimulated to industrialize itself by the adoption of Lean Construction practices in its constructive process. Given this fact, this research verify and identify Lean Tools and the level of application of these Tools in construction companies in the State of São Paulo, in order to be able to notice which Lean Concepts generate the highest benefits to these companies. The research method used was a survey applied only between construction companies that have some type of quality certificate. From the results, a data analysis was made in order to note the constructor's situation in relation to Lean Construction and, based on this analysis, verify the impact of the Lean Principles on the competitiveness of these companies and on the business performance. This way, it was possible to note a high level of application the Lean Tools by the responding companies. It also became clear, by means of this work: the strong influence of the concepts of Flow, of Continuous Improvement and of methods of prevention and resolutions of problems on the overall companies performance

Da coordenação modular à construção modular: estudos de caso

The presented work aimed to present the Modular Construction scenario, relating it to the fundamentals assumptions on the Modular Coordination Theory. The presentation of this theory, its historical development, its scope and tools, were conceived to further, show how the applicability on the conceptual and design phases is done. Also, studies cases are shown, in order to illustrate didactically how this process occurs. Basing on these studies, considerations are made about the use of modulation in projects in Brazil, at the expense of what happens on the international scenario, to highlight the importance of Modular Coordination for raising the standards of construction quality and rationality in the country

Viabilidade técnica e econômica do superadobe na construção de casas populares

The need for affordable housing and the high cost of today's building materials make necessary to look for useful and affordable technologies for these house buildings. In this context, this study aimed to evaluate the technical and economic feasibility of construction technology called Earthbag for use in public housing. Technical assessments were based on Kiffmeyer and Hunter's book (2004), academics dissertations and construction standards for the technology. The result allowed a positive evaluation towards the feasibility proposal and showing the possibility of replace the use of structural concrete blocks in public housing. The economic viability was performed an economical compared to a project Housing Project Bom Retiro 2 with one of Earthbag which have been shown considerable savings between the techniques. For the construction of masonry, build with purchased sand, 13% lower budget was found in comparison of a concrete masonry block. With the use of sand from the work site itself, there is a saving of 18%. Although earthbag has proven to be a technically and economically feasible for application in the construction of affordable housing, the shortage of technical and scientific studies and Brazilian regulations on this technology has limited its large-scale use

Avaliação do software Autodesk Revit 2016 para quantificação por meio da modelagem da informação da construção

The building budgeting quickly and accurately is a challenge faced by the companies in the sector. The cost estimation process is performed from the quantity takeoff and this process of quantification, historically, through the analysis of the project, scope of work and project information contained in 2D design, text files and spreadsheets. This method, in many cases, present itself flawed, influencing the making management decisions, once it is closely coupled to time and cost management. In this scenario, this work intends to make a critical analysis of conventional process of quantity takeoff, from the quantification through 2D designs, and with the use of the software Autodesk Revit 2016, which uses the concepts of building information modeling for automated quantity takeoff of 3D model construction. It is noted that the 3D modeling process should be aligned with the goals of budgeting. The use of BIM technology programs provides several benefits compared to traditional quantity takeoff process, representing gains in productivity, transparency and assertiveness

Afecção do tendão supra-espinal e afastamento laboral

As afecções do manguito rotador, dentre elas as relacionadas ao tendão supra-espinal, são problemas comuns na população, sobretudo devido à sobrecarga ocupacional, o que leva a altos índices de afastamento do trabalho. Buscou-se, então, comparar a necessidade de afastamento de trabalho entre os diferentes estados da afecção do tendão supra-espinal e entre cinco diferentes grupos profissionais, tendo a participação de pacientes que apresentavam diagnóstico da afecção. Os indivíduos foram agrupados quanto ao estado da doença (tendinite, ruptura parcial, ruptura total) e quanto aos aspectos biomecânicos da ocupação (ramo de serviços, construção civil, trabalhadores domésticos, lavradores e seguranças). Teste qui-quadrado de Pearson, análise de dependência e teste exato para uma proporção foram realizados. Os resultados apontaram que 62 (55%) estavam afastados da atividade laboral e que os grupos com maior número de afastados foram o do ramo de serviços (38,71%) e lavradores (22,58%), segundo Pearson. A maior freqüência de casos de afastamento foi registrada no estágio de tendinite (p<0,05) pela análise de dependência e a ocupação de lavrador parece deixar o indivíduo por mais tempo afastado (p=0,02), segundo teste de Pearson.

Aspectos morfológicos de frutos, sementes, germinação e plântulas de Hymenolobium petraeum

Hymenolobium petraeum Ducke é uma espécie arbórea pertencente à família Leguminosae conhecida popularmente por angelim-pedra. Apresenta alto valor comercial, com madeira muito utilizada na construção civil e marcenaria. Este trabalho teve por objetivo descrever morfologicamente o fruto, a semente e as plântulas, assim como, determinar as temperaturas cardeais para a germinação de sementes de angelim-pedra. Foram determinados o comprimento, a largura e a massa fresca de frutos e sementes. Para os testes de germinação foram utilizadas três repetições de 50 sementes, colocadas em placas de Petri e mantidas em germinadores nas temperaturas de 15, 20, 25, 30, 35 e 40°C e fotoperíodo de 12 horas. Os frutos são legumes-samaróides, indeiscentes, oblongos e unicarpelares. As sementes são de coloração castanho-escura, oblongas, estenospérmicas, exalbuminosas e com plúmula inconspícua. A raiz primária é branca e pubescente na região próxima ao colo; a parte aérea das plântulas possui pilosidade branca, protófilos compostos imparipinados e com inserção oposta, epicótilo verde, ereto, cilíndrico e piloso e os metáfilos imparipinados e com inserção alterna-espiralada. A germinação é semi-hipógea criptocotiledonar. Para de sementes de angelim-pedra as temperaturas máximas de germinação estão acima de 35°C e a mínima abaixo de 15°C, enquanto a faixa de temperatura ótima para germinação está entre 25 e 35°C.

Paisagem natural paleógena da bacia sedimentar de São Paulo no município de guarulhos, estado de São Paulo

Paleogene sediments of this region represent a significant source of water for urban, industrial and agricultural activities. This basin is part of the Southeastern Brazilian Continental Rift, which occupies a large portion of this geographical area. This study aims to present the evolution of the natural Paleogene landscape, through an analysis of its stratigraphic intcrops and underground portions based on the concept of facies and facies associations. A total of nine clastic and separate lithofacies were recognized and grouped into two main facies associations. These data suggest the existence of two depositional interdigitated systems: fluvial braided fans, which were predominant in parts of the northern and central area, and another composed of lacustrine sediments found in its central-south region. The paleogeography herein outlined will help considerably in the detection of new areas for mineral and water resources prospection, as well as in urban planning projects of this region.

Investigação tecnológica de arenitos silicificados da Formação Botucatu (ne do Paraná) para uso como rocha de revestimento

For many years the silicified sandstone associated of the Botucatu Formation has been the target of interest to researchers and miners, either for understanding the genesis of silicification or for your use as dimension stone and covering on the building industry. If in the first there are several articles available in the geological literature the second there are only technical data marketing available. In the northeast portion of the Paraná State and southwest of the São Paulo State these rocks are mined and traded as covering stones. Not much is known about their intrinsic characteristics and technological properties. To improve the knowledge of the technological behavior of these materials, samples from a quarry from Ribeirao Claro region were petrographically and physically characterized according to the standards established by the Brazilian Association of Technical Standards to dimension stones. Therefore, two bulk samples of silicified sandstone of the Ribeirão Claro/PR region were studied and characterized following the norms established by Brazilian Association of Technical Standards for dimension stones. The results obtained in the petrographical and technological studies are presented and indicated that, in general, the technological performance presented by sandstone studied induces limitations of use as covering materials, mainly horizontally as pavements, door stone and step ladder.

Classificação da curvatura de vertentes em perfil via Thin Plate Spline e Inferência Fuzzy

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O bambu na arquitetura: desing de conexões estruturais

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)