Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-06-30T18:08:23Z No. of bitstreams: 1 DIS_SERGIO_ROBERTO_DA_SILVA_COMPLETO.pdf: 2644731 bytes, checksum: 207623c4aecda0de23cefed577f3f2d6 (MD5) / Made available in DSpace on 2017-06-30T18:08:23Z (GMT). No. of bitstreams: 1 DIS_SERGIO_ROBERTO_DA_SILVA_COMPLETO.pdf: 2644731 bytes, checksum: 207623c4aecda0de23cefed577f3f2d6 (MD5) Previous issue date: 2017-03-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Nowadays, searching for alternatives materials for the construction industry has become imperative. Construction and demolition waste (CDW) and by-products from the thermoelectric industries, such as fly ash, are the subject of studies in several segments of the construction industry. Their use can be one of many significant efforts to achieve a more sustainable construction. This paper studies the influence of the interactions and incorporations of CDW and fly ash on the concrete properties. X-ray diffraction (XRD), X-ray Fluorescence Spectrometry (XRF) and particle size distribution analysis were used to characterize the investigated materials. The mechanical properties (compressive strength and splitting strength) and durability (water absorption and carbonation depth) of concrete with different CDW contents (25%, 50%, 75%, and 100%) were investigated as a coarse aggregate (10%, 15%, 25% and 30%) replacing Portland cement in different water/binder ratios (0.40, 0.45, 0.50, 0, 55 and 0.65). Based on the results, it was observed that the addition of fly ash replacing the Portland cement in concretes with CDW causes a reduction in mechanical properties and durability of concretes in the early ages. However, as the fly ash content increases in concretes with CDW there is an increase in the compressive strength ratio (fc91/fc28), and as the time of exposure to CO2 advances the carbonation coefficient tends to decrease. / A busca de novos materiais para o emprego na ind?stria da constru??o civil se faz necess?rio nos dias atuais. O res?duo da constru??o e demoli??o (RCD) e os subprodutos das ind?strias termoel?tricas como a cinza volante s?o objetos de estudos em diversos segmentos da ind?stria da constru??o civil, e a adi??o destes materiais pode ser um dos esfor?os significativos para se alcan?ar uma constru??o mais sustent?vel. Neste trabalho foram estudadas a influ?ncia das intera??es e incorpora??es de RCD e cinza volante nas propriedades dos concretos. Para a caracteriza??o dos materiais investigados foram utilizadas as t?cnicas de Difra??o de raios X (DRX), an?lise qu?mica por Espectrometria de Fluoresc?ncia de raios X (FRX) e an?lise de distribui??o granulom?trica ? laser. Foram investigadas as propriedades mec?nicas (compress?o axial e tra??o por compress?o diametral) e de durabilidade (absor??o d??gua e resist?ncia ? carbonata??o) dos concretos com diferentes teores de RCD (25%, 50%, 75% e 100%) como agregado gra?do reciclado em substitui??o ao gra?do natural e adi??o de cinza volante (10%, 15%, 25% e 30%) em substitui??o ao cimento Portland em diferentes rela??es ?gua/aglomerante (0,40, 0,45, 0,50, 0,55 e 0,65). Com base nos resultados observou-se que a adi??o de cinza volante em substitui??o ao cimento Portland em concretos com RCD causa uma redu??o nas propriedades mec?nicas e de durabilidade nos concretos nas primeiras idades. Entretanto, ? medida que o teor de cinza volante aumenta nos concretos com RCD h? um aumento na taxa de resist?ncia ? compress?o axial (fc91/fc28), e ? medida que o tempo de exposi??o ao CO2 vai se avan?ando o coeficiente de carbonata??o tende a diminuir.

Submitted by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-06-12T12:45:16Z No. of bitstreams: 1 MarineideAlvesdeSousaDissertacaoParcial2012.pdf: 837808 bytes, checksum: 72a094190e6e87453c356080b12f2161 (MD5) / Approved for entry into archive by Sara Ribeiro (sara.ribeiro@ucb.br) on 2017-06-12T12:45:37Z (GMT) No. of bitstreams: 1 MarineideAlvesdeSousaDissertacaoParcial2012.pdf: 837808 bytes, checksum: 72a094190e6e87453c356080b12f2161 (MD5) / Made available in DSpace on 2017-06-12T12:45:37Z (GMT). No. of bitstreams: 1 MarineideAlvesdeSousaDissertacaoParcial2012.pdf: 837808 bytes, checksum: 72a094190e6e87453c356080b12f2161 (MD5) Previous issue date: 2012-08-10 / Construction industry has been gaining prominence in Brazil, mainly due to the economic growth of this country. The growth of the construction industry sector contributes to the increase of Construction and Demolition Waste (CDW) in landfill sites and clandestine dumps in large cities, as well as to the rise of workplace accidents in construction sites. The main reason for this scenario is the negligence of the building companies and the lack of inspection by the government. The Integration of the Plans for Solid Waste Management and Safety at Work for Civil Construction aims to meet Resolutions 307 and 448 of the National Environment Council (CONAMA), as well as the Regulatory Standards promulgated by the Ministry of Labor and Employment (MTE). These regulations rule and control such situations and establish the pathway for the building companies and the construction workers to deal with policies and practices for the adequate management of CDW and for safety and health at the construction workplace. The methodological approach adopted in this study is guided by the collection of secondary data, that is, knowledge gained from bibliographical review, which includes national and international sources (books, scientific papers and articles, technical reports, online information and specialized magazines), as well as the Brazilian legislation related to the Management of Waste and Health and Workplace Safety at the Construction Site. The main Brazilian pieces of legislation, technical regulations and certifications analyzed were: Law 12.305, published in August, 2nd 2010, which institutes the National Solid Waste Policy; CONAMA Resolution 307, published in July, 5th 2002, which defines guidelines, criteria and procedures for the management of civil construction waste; Brazilian Norms (NBR) related to the issue of Construction Waste Management; Regulatory Standards issued by the Ministry of Labor and Employment, approved by the Ministerial Directive 3.214, from June 8th, 1978; and the LEED Certificate for new buildings and reforms. In order to study the integration of workplace safety management, the recommendations of the Ministry of Labor and Employment Regulatory Standard 18 were followed. In the study design, two scenarios were considered: 1) designing an Integrated Management Plan in the planning phase of the project, before the beginning of the construction works; 2) designing an Integrated Management Plan for ongoing construction works. For ongoing construction works, a checklist was prepared which was used for the situational diagnosis. Also, verification lists of the Health and Safety at the Workplace Programs (PCMAT, PPRA, and PCMSO) were presented. The study focused on structuring the designing procedures of the Integrated Management Plan; however, it did not contemplate the phases of implementation, monitoring, assessment of results and correction of inconsistencies. The results of this study lead to the conclusion that it is possible to design an Integrated Plan for Solid Waste Management and Workplace Safety in Civil Construction, assuring conformity with the legal requisites. The situational diagnosis for ongoing construction works facilitates and accelerates the planning process of the proposed Integrated Plan. Planning in the project phase will make it easier to reduce issues such as additional costs, delays, and contractual or inspection penalties. In the execution phase, capacity-building is essential, because it is in this phase that the waste is actually managed. Awareness and participation of the workers are indispensable for the success of the processes planned. The Integrated Plan meets the Brazilian norms and legislation related to the Management of Construction and Demolition Waste, as well as the basic requirements of National and International Certification Programs. Searching and fostering more efficient processes and technologies for CDW and Health and Safety at the Workplace must be constant. / A ind??stria da constru????o civil vem ganhando destaque no Brasil principalmente devido ao crescimento econ??mico do pa??s. O aquecimento deste setor contribui para o aumento de Res??duos da Constru????o e Demoli????o (RDC) nos aterros e em ??reas de bota-fora clandestinos espalhados pelas grandes cidades do pa??s, como tamb??m para o aumento de acidentes de trabalho nos canteiros de obras. A principal causa deste cen??rio ?? o descaso por parte das construtoras e a falta de fiscaliza????o pelo governo. A Integra????o dos Planos de Gerenciamento de Res??duos S??lidos e Seguran??a do Trabalho para a Constru????o Civil visa atender as Resolu????es n?? 307 e n?? 448 do Conselho Nacional do Meio Ambiente (CONAMA), assim como as Normas Regulamentadoras do Minist??rio do Trabalho e Emprego (MTE), que regulamentam e controlam tais situa????es e estabelecem os caminhos para as construtoras e profissionais da Constru????o de Obras Civis, no que se refere ??s pol??ticas e as pr??ticas de gerenciamento adequado dos Res??duos da Constru????o e Demoli????o (RCD) e da Seguran??a e Sa??de do Trabalho aplicada ?? constru????o civil. O procedimento metodol??gico adotado neste estudo ?? conduzido pela extra????o de dados secund??rios, isto ??, conhecimentos obtidos por meio de levantamentos bibliogr??ficos com estudo e an??lise de obras nacionais e internacionais (livros, textos e artigos cient??ficos, relat??rios t??cnicos, informa????es via WEB e revistas especializadas), assim como a consulta da legisla????o brasileira relacionada ao tema ???Gerenciamento de Res??duos e da Sa??de e Seguran??a do Trabalho na Constru????o Civil???. Tomou-se como refer??ncia principal a legisla????o brasileira, normas t??cnicas e certifica????es a respeito do tema em estudo, conforme listado: Lei n. 12.305, publicada em 02/08/2010, que institui a Pol??tica Nacional de Res??duos S??lidos; Resolu????o n?? 307 do CONAMA de 05/07/2002, que estabelece diretrizes, crit??rios e procedimentos para a gest??o dos res??duos da constru????o civil; Normas Brasileiras (NBR) relacionadas ao tema Gest??o de Res??duos de Constru????o; Normas Regulamentadoras do Minist??rio do Trabalho e Emprego, aprovadas pela Portaria n. 3.214 de 08/06/78; Certifica????o LEED para novas edifica????es e reformas. Para integra????o do gerenciamento da seguran??a do trabalho foram seguidas as recomenda????es da Norma Regulamentadora (NR) 18 do Minist??rio do Trabalho e Emprego. Na elabora????o do estudo proposto foram considerados dois cen??rios: 1) Elabora????o de Plano Integrado de Gerenciamento na fase de planejamento do projeto (antes do in??cio da obra); 2) Elabora????o de Plano Integrado de Gerenciamento para obras em fase de execu????o (obras em andamento). Para obras em fase de execu????o foi elaborado um checklist para realiza????o do diagn??stico situacional. Em complemento foram apresentadas listas de verifica????o dos Programas de SST exigidos (PCMAT, PPRA, e PCMSO). O estudo proposto restringiu-se ?? estrutura????o dos procedimentos de elabora????o do Plano Integrado de Gerenciamento sem, contudo, contemplar as etapas de implementa????o, monitoramento, avalia????o dos resultados e adequa????o das n??o conformidades. Os resultados obtidos com a realiza????o deste trabalho permitiram concluir que ?? poss??vel a elabora????o de um Plano Integrado de Gerenciamento de Res??duos S??lidos e Seguran??a do Trabalho para a Constru????o Civil, assegurando a conformidade com os requisitos legais. O diagn??stico situacional para obras em andamento viabiliza e agiliza o processo de planejamento do Plano Integrado proposto. O planejamento na fase de projeto da obra poder?? reduzir custos adicionais, atrasos, penalidades contratuais ou de fiscaliza????o, entre outros. Na fase de execu????o a capacita????o dos envolvidos ?? de fundamental import??ncia, pois ?? nesta fase que os res??duos passam por todos os processos do gerenciamento de fato. A conscientiza????o e participa????o por parte da m??o-de-obra s??o imprescind??veis para o sucesso dos processos planejados. O Plano integrado atende as normas e legisla????o brasileira referente ao GRCD, assim como aos requisitos b??sicos para os Programas de Certifica????es nacional e internacional. A busca e o incentivo por processos e tecnologias mais eficazes para o gerenciamento dos RCD e SST devem ser constantes.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T23:07:53Z No. of bitstreams: 1 CinthiaMaiaPederneiras_DISSERT.pdf: 5172350 bytes, checksum: 869c10f054af1edda7a401ef7faf0e62 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-11T22:49:22Z (GMT) No. of bitstreams: 1 CinthiaMaiaPederneiras_DISSERT.pdf: 5172350 bytes, checksum: 869c10f054af1edda7a401ef7faf0e62 (MD5) / Made available in DSpace on 2017-04-11T22:49:22Z (GMT). No. of bitstreams: 1 CinthiaMaiaPederneiras_DISSERT.pdf: 5172350 bytes, checksum: 869c10f054af1edda7a401ef7faf0e62 (MD5) Previous issue date: 2017-02-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Este trabalho tem como objetivo analisar a utiliza??o dos res?duos de constru??o e demoli??o de obras gerados no munic?pio de Natal/ RN como agregados reciclados para a fabrica??o de blocos de pavimenta??o intertravada. Na primeira etapa foi realizada a caracteriza??o minuciosa dos agregados mi?dos e gra?dos. Os ensaios utilizados para este fim foram granulometria, massa unit?ria, massa especifica, ?ndice de forma, material pulverulento, material org?nico, absor??o de ?gua, inchamento, fluoresc?ncia de raio X (FRX), difratograma de raio X (DRX) e microscopia eletr?nica de varredura (MEV). A partir dos ensaios de caracteriza??o de agregados naturais e reciclados pode-se estabelecer uma compara??o das propriedades f?sicas, qu?micas e microsc?picas. A fabrica??o dos blocos foi realizada com o tra?o em volume e substitui??o de 100% de agregados reciclados. As vari?veis analisadas foram as condi??es dos agregados reciclados na mistura, investigando seu desempenho na condi??o seca, lavada e saturada. Os ensaios para analisar a viabilidade t?cnica dos blocos, conforme a norma espec?fica NBR 9781 (2013), foram resist?ncia ? compress?o (em idades de 7, 14, 28 e 270 dias) e absor??o de ?gua (aos 28 e 270 dias). Para avaliar o desgaste dos blocos foi constru?do um prot?tipo, o qual foi analisado ap?s um ano de constru??o. Os blocos fabricados apenas com agregado mi?do reciclado apresentaram um incremento na resist?ncia ? compress?o quando comparados aos blocos de refer?ncia. J? os blocos confeccionados com agregado gra?do reciclado obtiveram as menores resist?ncias. Observou-se tamb?m que quando os agregados reciclados s?o lavados apresentam melhor desempenho no produto final. Os resultados obtidos mostraram-se satisfat?rios para a aplica??o dos blocos em ruas de baixo movimento e pouca carga. Com o intenso crescimento dos res?duos oriundos da constru??o civil, destaca-se a relev?ncia desta pesquisa, a qual prop?e a fabrica??o de um produto sustent?vel que visa minimizar o uso dos recursos naturais e promover uma destina??o adequada para os res?duos gerados. / This work aims to analyze the use of construction and demolition waste in Natal / RN as recycled aggregates for precast concrete paving blocks. In the first stage, the detailed characterization of the aggregates (fine and coarse) was carried out. The tests used for this purpose were grading curves, bulk density, dry specific density, powdery material, organic material, water absorption, X-ray fluorescence (FRX), X-ray diffraction (XRD) and electron microscopy of Scanning (SEM). From the characterization tests of natural and recycled aggregates is possible to analyze physical, chemical and microscopic properties. Ten different mixes were analyzed with an effective water/cement ratio of 0.4 for recycled rates of coarse and fine aggregates of 100%. This research analyzed the conditions of the recycled aggregates in the mixture (dry, washed and saturated), evaluation of the performance of aggregates in a concrete mix. The tests to analyze the technical viability of the concrete blocks, according to the specific norm NBR 9781 (2013), were compressive strength (at ages of 7, 14, 28 and 270 days) and water absorption (at ages of 28 and 270 days). To evaluate the durability, a prototype was constructed, which was analyzed after one year of construction. The blocks made with only recycled sand showed an increase in the results of compressive strength when compared to the reference blocks. The blocks made with recycled coarse obtained the smallest resistance. It was also observed that when the recycled aggregates are washed present a better performance in the final product. The results obtained were satisfactory for the application of the blocks in streets of low movement and low load. With the intense growth of waste from civil construction, the relevance of this research is proposes the manufacture of a sustainable product that aims to minimize the use of natural resources and promote a proper destination for the waste generated.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T22:25:25Z No. of bitstreams: 1 RuanLandolfoDaSilvaFerreira_DISSERT.pdf: 5373766 bytes, checksum: 13b9b589b54063a3ed114c1d60d827c5 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-08T22:20:54Z (GMT) No. of bitstreams: 1 RuanLandolfoDaSilvaFerreira_DISSERT.pdf: 5373766 bytes, checksum: 13b9b589b54063a3ed114c1d60d827c5 (MD5) / Made available in DSpace on 2017-06-08T22:20:54Z (GMT). No. of bitstreams: 1 RuanLandolfoDaSilvaFerreira_DISSERT.pdf: 5373766 bytes, checksum: 13b9b589b54063a3ed114c1d60d827c5 (MD5) Previous issue date: 2017-03-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / O processo de constru??o, reforma e demoli??o, pode ocasionar significativos problemas ao meio ambiente, devido a extra??o de mat?rias primas e a destina??o inadequada dos res?duos gerados. Em especial os res?duos de constru??o e demoli??o (RCD) que, comumente correspondem a mais da metade dos res?duos s?lidos urbanos, tem como principais destinos, terrenos baldios, margens de estradas e rios, acarretando s?rios impactos ambientais, sociais e econ?micos. Atualmente, a reutiliza??o de agregados reciclados (AR), especialmente de composi??o mista, ? estudada em menor grau, quando comparado aos AR de concreto. Com isso, por n?o possuir alternativas para sua utiliza??o, uma grande quantidade desse tipo de AR ? armazenada pelas usinas. Nesse sentido, buscou-se analisar a viabilidade t?cnica e econ?mica da utiliza??o de AR com diferentes composi??es granulom?tricas e em condi??o lavada, ? n?veis de substitui??o de 25, 50, 75 e 100% do agregado natural (AN), na produ??o de argamassas mistas de revestimento. Para a produ??o das argamassas, utilizou-se cimento CP II Z-32, cal CH-I e uma propor??o em volume de 1:1:6, cujo teor de ?gua foi determinado para as misturas alcan?arem uma consist?ncia de 260 mm. Inicialmente, analisou-se as propriedades f?sicas, qu?micas, mineral?gicas e microestruturais dos agregados e da fra??o de finos (<0,15 mm). Buscando avaliar a viabilidade t?cnica das argamassas foram caracterizadas no estado fresco, por meio dos ensaios de consist?ncia, reten??o de ?gua, densidade de massa e teor de ar incorporado. E no estado endurecido, a resist?ncia ? compress?o, resist?ncia ? tra??o na flex?o, m?dulo de elasticidade din?mico, absor??o por capilaridade, absor??o por imers?o, resist?ncia de ader?ncia e fissura??o. Foi utilizado o custo para produzir 1 m? de argamassa visando avaliar a viabilidade econ?mica. Constatou-se, que as argamassas com AR, independentemente de sua composi??o granulom?trica ou condi??o, apresentaram maior consumo de ?gua, menor densidade de massa e teor de ar incorporado, assim como adequada capacidade de reten??o de ?gua. No estado endurecido, as argamassas que possu?am AR com a presen?a de finos, apresentaram maior resist?ncia, maior m?dulo de elasticidade e menor porosidade e permeabilidade. No entanto, o desempenho dos revestimentos frente ao potencial de ader?ncia ao substrato e a quantidade de fissuras, foi inferior, confirmando a premissa de que a utiliza??o de AR com finos n?o ? indicada para a produ??o de argamassas de revestimento. Quanto a viabilidade econ?mica, ao incorporar o AR, o custo para produzir 1 m? de argamassa diminui. No entanto, admite-se que ? vi?vel a utiliza??o de AR para a produ??o de argamassas de revestimento, especialmente quando se disp?e de agregados com adequada composi??o granulom?trica, isentos de finos e em condi??o lavada. / The construction, reform and demolition process can cause significant problems to the environment due to the extraction of raw materials and an inadequate disposal of the waste generated. In particular, construction and demolition wastes (CDW), which commonly correspond to more than half of urban solid waste, have as main destinations, vacant lots, roadsides and rivers, causing serious environmental, social and economic impacts. Currently, a recycling of recycled aggregates (RA), especially of mixed composition has been studied to lesser extent when compared to RA of concrete. Therefore, because it does not have alternatives for their use, a large amount of this type of RA is stored by plants. In this sense, the aim of this research is to analyze the technical and economic viability of the use of RA with different grain size and washed condition compositions, at 25, 50, 75 and 100% substitution levels of the natural aggregate (NA), in the production of mixed mortars. For the production of mortars, CP II Z-32 cement, lime CH-I and a volume ratio of 1:1: 6 were used. Water content was adjusted to mixtures with a consistency of 260 mm. Initially, the physical, chemical, mineralogy and microstructural properties of the aggregates and the fines fraction (<0.15 mm) were analyzed. Seeking to assess the technical feasibility of mortars were characterized fresh, through consistency tests, water retention, bulk density and entrained air content. And in the hardened state, the compressive strength, flexural tensile strength, dynamic modulus of elasticity, water absorption by capillarity, immersion absorption, adherence strength and susceptibility to cracking. The cost of production of 1 m? of mortar was used for an assessment of economic feasibility. It was showed that, as mortars with RA, regardless of their size distribution or condition, presented higher water consumption, lower bulk density and incorporated air content, as well as water retention capacity. In the hardened state the mortars had RA with the presence of thin, had higher resistance, higher modulus and lower porosity and permeability. However, the performance of the mortar coverings to the potential of adhesion to the substrate and a number of cracks has been lower, confirming a premise that the use of RA with fines is not indicated for coating mortars. As for the economic feasibility, to incorporate RA, the cost to produce 1 m? of mortar decreases. However, it is recognized that the use of RA for the production of coating mortars is feasible, especially when aggregates with adequate size distribution are available, without fines and in washed condition.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2017-02-02T00:09:36Z No. of bitstreams: 1 CONCRETO COM AGREGADO GRAU?DO RECICLADO DE CONCRETO_DOSAGEM E PRODUC?A?O.pdf: 3147518 bytes, checksum: 5fc02389f0e0978e3636005417e03f9e (MD5) / Made available in DSpace on 2017-02-02T00:09:36Z (GMT). No. of bitstreams: 1 CONCRETO COM AGREGADO GRAU?DO RECICLADO DE CONCRETO_DOSAGEM E PRODUC?A?O.pdf: 3147518 bytes, checksum: 5fc02389f0e0978e3636005417e03f9e (MD5) Previous issue date: 2016-08-04 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / A proper mix design and production must be done in order to increase the use of recycled concrete. The type of recycled aggregate (RA) used, the best replacement content, the best sequence and mixing time and the best way to evaluate the workability are some of the features that must be considered. Thus, this work was done to evaluate the mix design and production of concrete with concrete recycled coarse aggregate (RCA), using as a measure of workability the flow test in Graff?s table. Two levels of recycled coarse aggregate (20 and 40%), two levels of flow, for plastic and fluid mixtures, (350 and 400mm), and two mix design methods (IPT/EPUSP and ABCP) were evaluated on the concrete compressive strength, at 7 and 28 days of age. The results pointed out that the IPT/EPUSP mix design method was more suitable for recycled concrete. The flow test in Graff?s table, as a measure of workability, and the two stage mixture approach presented to be more suitable for the mix design and production of recycled concrete. Also, in this study, the concrete RCA content evaluated did not influence the compressive strength of concrete produced. So, it is completely feasible to use up to 40% replacement of NCA by concrete RCA. / Para ampliar o uso de concretos reciclados deve-se estabelecer a sua dosagem e produ??o considerando aspectos relacionados com o tipo de agregado reciclado (AR) utilizado, o melhor teor de AR, a melhor sequ?ncia e tempo de mistura e a melhor forma de avaliar a trabalhabilidade desses concretos. Assim, este trabalho foi desenvolvido com o objetivo de avaliar a dosagem e produ??o de concretos com ARs de concreto, usando como medida de trabalhabilidade o ensaio de espalhamento na mesa de Graff. Os teores de aplica??o do agregado gra?do reciclado(AGR) foram 20 e 40%. Foram avaliados dois n?veis de espalhamento (350 e 400mm) e dois m?todos de dosagem (IPT/EPUSP e ABCP). Os concretos foram avaliados ainda quanto a resist?ncia ? compress?o axial, aos 7 e 28 dias, e os resultados obtidos foram tratados estatisticamente atrav?s da an?lise de vari?ncia(ANOVA). Os resultados mostraram que o m?todo de dosagem do IPT/EPUSP apresentou-se mais adequado para a dosagem de concretos reciclados. O ensaio de espalhamento na mesa de Graff, como medida da trabalhabilidade, e o m?todo de mistura em duas etapas apresentaram-se adequados para a dosagem e produ??o de concretos reciclados. Nesse estudo, o teor de AGR avaliado n?o influenciou a resist?ncia ? compress?o dos concretos produzidos, sendo plenamente vi?vel o uso de at? 40% do agregado gra?do reciclado de concreto.

Submitted by SBI Biblioteca Digital (sbi.bibliotecadigital@puc-campinas.edu.br) on 2018-02-16T17:20:40Z No. of bitstreams: 1 LILIAN CORPAS BUCENE OLIVEIRA.pdf: 2456363 bytes, checksum: dfcf0b460775e677213c888d5bb3611d (MD5) / Made available in DSpace on 2018-02-16T17:20:40Z (GMT). No. of bitstreams: 1 LILIAN CORPAS BUCENE OLIVEIRA.pdf: 2456363 bytes, checksum: dfcf0b460775e677213c888d5bb3611d (MD5) Previous issue date: 2017-12-14 / Funda??o de Amparo ? Pesquisa do Estado de S?o Paulo - FAPESP / The growth of urban centers has created new challenges for construction activities. It?s not only the environmental point of view, but also from logistical and economic reasons, two aspects that stand out, which are the management of rainwater and a destination of solid construction and demolition residues aggregate (RCD) . One of the alternatives to relieve the drainage system is the pervious concrete pavement (PCP), which allow infiltration of water into the base or soil, reducing floodings, water accumulations on roads and improving aquifers supply. The PCP employs in its composition, little or no fine aggregates, what providing a higher a volume of voids to the element, and consequently permeability. The addition of RCD in the pervious concrete?s composition is justified both by the increasing difficulty of disposal of these materials and by the reduction of the extraction of natural aggregates, favoring a reduction of the environmental impacts generated by the civil construction. Therefore, the production of pavement using pervious concrete made with recycled concrete aggregate (ARC) is one of the alternatives that has been researched to reduce the environmental impact of construction, protecting water resources and being able to avoid flood areas of flood with a lower consumption of natural goods. The effectiveness of water infiltration capability can be partially compromised due to the occurrence of clogging, which is influenced by the type and size of the infiltrated sediment into to the water and the precipitation intensity. This research studied two different types of PCP, produced with and without ARC, evaluating their behavior regarding mechanical, physical and hydraulic properties. A comparison was also made between different types of sediments to simulate the permeation of the pervious concrete. For this, laboratory studies were carried out and also equipment was developed to simulate a real situation of application of this type of concrete. It was observed the influence on the characteristics of PCP, with the use of ARC, as well as the permeability index after filling with various types of materials. The PCP using recycled aggregates obtained a satisfactory result, it was also verified that the test method to obtain the permeability index or the infiltration rate influenced in the analysis. It may also be noted that the adaptation of ?in situ? laboratory tests performed in the laboratory has not been shown to be adequate to the actual situation due to the influence of the floor base. / O crescimento dos centros urbanos tem produzido novos desafios ?s atividades da constru??o civil. N?o apenas do ponto de vista ambiental, mas tamb?m por quest?es log?sticas e econ?micas, dois aspectos v?m se destacando no ?mbito do setor nas grandes metr?poles, que s?o o manejo de ?guas de chuvas e a destina??o de res?duos s?lidos de constru??o e demoli??o (RCD). Uma das ferramentas que pode ser utilizada para aliviar o sistema de drenagem ? o emprego de pavimentos de concreto perme?vel (PCP), que permitem a infiltra??o de ?gua na base ou no solo, diminuindo os picos de cheia, ac?mulos de ?gua nas vias p?blicas, melhorando o abastecimento dos aqu?feros. O PCP ? uma mistura que emprega na sua composi??o pouco ou nenhum agregado mi?do, proporcionando maior ?ndice de vazios ao concreto, e consequentemente um elevado coeficiente de permeabilidade. A adi??o do RCD na composi??o do concreto perme?vel justifica-se tanto pela crescente dificuldade de descarte desses materiais quanto pela redu??o da extra??o de agregados naturais, propiciando uma redu??o dos impactos ambientais gerados pela constru??o civil. Portanto, a produ??o de pisos, usando o PCP elaborado com o agregado reciclado de concreto (ARC) proveniente do RCD, ? uma das alternativas que v?m sendo pesquisada para reduzir o impacto ambiental da constru??o, protegendo os recursos h?dricos e evitando ?reas de inunda??o com um menor consumo de bens naturais. A efic?cia da taxa de infiltra??o da ?gua de chuva no concreto perme?vel pode ser parcialmente comprometida devido ? ocorr?ncia da colmata??o, que ? influenciada pelo tipo e tamanho do sedimento infiltrado junto ? ?gua e a intensidade da precipita??o. Esta pesquisa estudou dois diferentes tipos de PCP, produzidos com e sem ARC, avaliando seu comportamento quanto ?s propriedades mec?nicas, f?sicas e hidr?ulicas. Tamb?m foi realizada uma compara??o entre diferentes tipos de sedimentos para simula??o da colmata??o do concreto perme?vel, para tal, foram realizados estudos em equipamentos desenvolvidos para simula??o do processo de colmata??o em um canteiro real. Observou-se a influ?ncia nas caracter?sticas do PCP, com o emprego do ARC, bem como a taxa de infiltra??o ap?s colmata??o com v?rios tipos de materiais. O emprego do ARC propiciou resultado satisfat?rio nas caracter?sticas do concreto perme?vel e verificou-se que os m?todos de ensaio para obten??o do coeficiente de permeabilidade ou da taxa de infiltra??o influenciam na an?lise do concreto perme?vel. Tamb?m pode-se notar que a adapta??o de ensaios para an?lise ?in loco? reproduzidos em laborat?rio n?o se mostrou adequada ? situa??o real devido a influ?ncia da base dos pavimentos.