The thesis is dealing with mixing processes havingapplication to ground improvement by deep mixing. The mainobjectives of the thesis is to make a contribution to knowledgeof the basic mechanisms in mixing binding agents into soil andimprove the knowledge concerning factors that influence theuniformity of stabilised soil. A great part of the work consists of a literature surveywith particular emphasis on literature on the processindustries. This review forms a basis for a profounddescription and discussion of the mixing process and factorsaffecting the process in connection with deep mixingmethods. The thesis presents a method for a simple field test for thestudy of influential factors in the mixing process. A number offactors in the installation process of lime-cement columns havebeen studied in two field tests using statistical multifactorexperiment design. The effects of retrieval rate, number ofmixing blades, rotation speed, air pressure in the storagetank, and diameter of the binder outlet on the stabilisationeffect and the coefficient of variation determined byhand-operated penetrometer tests for excavated lime-cementcolumns, were studied. The literature review, the description of the mixingprocess, and the results from the field tests provide a morebalanced picture of the mixing process and are expected to beuseful in connection to ground improvement projects and thedevelopment of mixing equipments. The concept of sufficient mixture quality, i.e. theinteraction between the mixing process and the mechanicalsystem, is discussed in the last section. By means ofgeostatistical methods, the analysis considers thevolume-variability relationship with reference to strengthproperties. According to the analysis, the design values forstrength properties depends on the mechanical system, the scaleof scrutiny, the spatial correlation structure, and the conceptof safety, i.e. the concept of sufficient mixture quality isproblem specific. Key words:Deep Mixing, Lime cement columns, Mixingmechanisms, Mixture quality, Field test, ANOVA, Variancereduction.

Trust between team members is important: Research has shown that teams with higher levels of trust have a propensity to be higher performers. This study built on contemporary trust theory by examining initial interpersonal trust development between a new team member and a newly formed work-team using experimental rather than correlation-based survey methods. Undergraduate students from a metropolitan Australian university participated in a vignette experiment examining the effect of teams with varying levels of Ability, Benevolence and Integrity on trust development. It was hypothesised that these antecedents of trust do not have similar effect on our Intention to Trust as is currently depicted in Mayer, Davis and Schoorman's (1995) integrative model of organisational trust. Their model is developed by hypothesising that the type and magnitude of the information we receive about a trustee moderates the relationship between our Intention to Trust and its antecedents. Initial examination of the traditional scales identified overlaps that needed clarification. This was completed by informing existing scales and the vignette manipulations with the context specific information that emerged from the thematic analysis of structured interviews. Subsequent analyses of the questionnaire data used ANOVA and Structural Equation Modelling techniques. In testing the hypotheses, Ability was found to be most salient in the development of Intention to Trust. This research contributes methodologically by developing a vignette-based experimental method that improves the reliability of existing trust scales. The study contributes theoretically by further explaining the salience of the trust antecedents and practically by identifying that the judgment and decision-making of new workteam members can be distorted by halo bias wherein they ignore the Benevolence traits of team members of a group that exhibits high levels of Ability.

Transmission lines of any voltage level are subject to faults. To speed up repairs and restoration of power, it is important to know where the fault is located. A fault location algorithm’s result is influenced by a series of modeling equations, setting parameters and system factors reflected in voltage and current inputs. The factors mentioned are subject to sources of uncertainty including measurement and signal processing errors, setting errors and incomplete modeling of a system under fault conditions. These errors have affected the accuracy of the distance to fault calculation. Accurate fault location reduces operating costs by avoiding lengthy and expensive patrols. Accurate fault location speeds up repairs and restoration of lines, ultimately reducing revenue loss caused by outages. In this thesis, we have reviewed the fault location algorithms and also how the uncertainty affects the results of fault location. Sensitivity analysis is able to analyze how the variation in the output of the fault location algorithms can be allocated to the variation of uncertain factors. In this research, we have used global sensitivity analysis to determine the most contributed uncertain factors and also the interaction of the uncertain factors. We have chosen Analysis of Variance (ANOVA) decomposition as our global sensitivity analysis. ANOVA decomposition shows us the insight of the fault location, such as relations between uncertain factors of the fault location. Quasi regression technique has also been used to approximate a function. In this research, the transmission line fault location system is fitted into the ANOVA decomposition using quasi regression. From the approximate function, we are able to get the variance of the sensitivity of fault location to uncertain factors using Monte Carlo method. In this research, we have designed novel methodology to test the fault location algorithms and compare the fault location algorithms. In practice, such analysis not only helps in selecting the optimal locator for a specific application, it also helps in the calibration process. / Thesis (M.Eng.Sc.) -- University of Adelaide, School of Electrical and Electronic Engineering, 2009

Made available in DSpace on 2014-06-11T19:27:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-24Bitstream added on 2014-06-13T19:14:27Z : No. of bitstreams: 1 gonsalez_cg_me_ilha.pdf: 4679748 bytes, checksum: 5f6a627734b2110f92059053c2470814 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Pesquisadores de diversas partes do mundo se empenham em desenvolver técnicas capazes de monitorar a integridade de máquinas, veículos e estruturas, principalmente as que a ruptura ou destruição possa provocar acidentes e catástrofes. Neste contexto, várias técnicas não destrutivas podem ser utilizadas para monitorar estes sistemas permitindo a realização de reparos e, evitando maiores prejuízos econômicos e danos sociais. A técnica da Impedância Eletromecânica está entre as técnicas baseadas na utilização de materiais piezelétricos e, particularmente, utiliza-se de uma curva sensível a pequenas variações na estrutura, característica que faz a técnica ser eficiente na detecção de danos incipientes. No entanto, sob variações das condições ambiente e de teste, a sensibilidade da técnica pode produzir falsos diagnósticos. Desta forma, o desafio atual é aplicar a técnica da Impedância Eletromecânica em sistemas de monitoramento considerando condições mais próximas às condições de operação reais dos sistemas a serem monitorados. Este trabalho apresenta duas metodologias para sistemas SHM, a primeira consiste em utilizar a técnica de agrupamento Fuzzy c-means para entender e considerar o efeito da temperatura nos sinais da Impedância Eletromecânica. A segunda metodologia utiliza análise de variância (ANOVA) para propor uma metodologia de detecção mais robusta, e assim, incorporar variações aleatórias nos sistemas de medição e aquisição sem comprometer o diagnóstico SHM / Researchers around the world are engaged to develop techniques for structural health monitoring of machinery, vehicles and structures, especially systems where damage or destruction could induce accidents and disasters. In this context, several non-destructive techniques can be used to monitor these systems allowing repairs and avoiding major economic losses or social losses. The electromechanical impedance technique is among the techniques based on piezoelectric materials use and it is sensible to small variations in the structure which makes it efficient in detecting incipient damages. However, variations in the ambient or test conditions can cause false diagnoses. Therefore, the current challenge is to apply the electromechanical impedance technique considering monitoring conditions closer to real operating conditions of the systems to be monitored. This work presents two methodologies for SHM systems. The first one uses Fuzzy c-means clustering to distinguish the temperature effect on impedance signal. The second method uses analysis of variance (ANOVA) to propose a more robust detection methodology and thus incorporate random variations in measurement systems and acquisition without loss of SHM diagnostic

Orientador: Vicente Afonso Ventrella / Resumo: A soldagem é um processo de fabricação utilizado em geral para união de peças e quando utiliza o laser como fonte de calor, denomina-se soldagem a laser. Um tipo bem conhecido é a soldagem a laser Nd:YAG pulsado, utilizado em diferentes tipos de materiais. Um dos materiais mais utilizados na engenharia é o aço inoxidável que possui alta resistência à corrosão, como por exemplo o aço AISI 904L, muito utilizado em tanques de armazenamento de ácido sulfúrico e fosfórico além de ampla aplicação na indústria petroquímica. Conduziu-se uma soldagem à laser Nd: YAG pulsado em chapas de aço inoxidável AISI 904L com espessura de 3 mm, variando-se quatro fatores tais como Potência de pico (PP) , Largura temporal (w), Frequência (F) e Velocidade de soldagem (S), todos eles distribuidos em três níveis de variação. Foi feito um Planejamento Experimental através do Método Taguchi, utilizando-se uma matriz ortogonal L9 e portanto realizando-se 9 experimentos em condições diferentes. A soldagem foi executada em atmosfera protetora com gás Argônio com fluxo de gás de 15 l/min, com deslocamento automatizado. A energia de cada pulso variou de 30 a 38,4J e a energia de soldagem entre 1,5 e 3,2 kJ/mm; as taxas de sobreposição variaram de 60 a 83%. As amostras foram preparadas para metalografia e atacadas com Ácido Oxálico 10% eletrolítico, com 6V e 7 segundos. Apesar da maioria das amostras romperem na Zona Fundida (ZF), a resistência mecânica ficou muito próxima do valor encontrado para o Metal B... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Welding is a manufacturing process used for joing parts and when a laser is utilized as a heat source, its called Laser Welding. A very known type is the pulsed Nd: YAG Laser Welding, that is used in many different kinds of materials. One of the most applied materials in engineering is the stainless steel that is highly corrosion resistant, for example the AISI 904L that is frequent used in sulfuric and phosphoric acid storage tanks, besides the petrochemical industry. Was carried out a pulsed Nd:YAG laser welding in AISI 904L stainless steel sheets with 3 mm of thickness, varying four factors such as Peak Power (PP), Time width (w), Frequency (F) and Welding Velocity (v), all of them distributed in three levels. A Design of Experiment was made through the Taguchi Method, using a L9 ortogonal array and therefore conducting nine experiments in different conditions. The welding was performed in argon gas flow of 15l/min, with automatic displacement. Pulse energy varied since 30 to 38,4J and welding energy from 1,5 to 3,2 kJ/mm; the overlay rates varied between 60 and 83%. Samples were prepared for metallography and etched with Oxalic Acid 10%, eletrolitic in 6v and 7 seconds. Although most of the samples broke in the Weld Zone (WZ), the mechanical resistance stayed very closer to the values found in Base Metal (BM). For BM, TZ and WZ, the mean values of hardness was 215, 242 and 238 HV respectively, pointing a homogeneous welding wherein the WZ presented only austenitic phase a... (Complete abstract click electronic access below) / Mestre

Carbon-carbon (C/C) composites are notable among engineering materials in aerospace and defense industries possessing excellent specific mechanical, thermal, frictional and wear properties. C/C maintain their properties at temperatures where most of the high end alloys give in, and maintain their dimensional stability at temperatures above 2000 oC. C/C is frequently used in aircraft and automotive industries as brake materials. However, frictional performance is dependent on various parameters: microstructure, fiber type, fiber orientation distribution, fiber/matrix interfacial bond, heat treatment, and oxidation. The present study in dissertation provides an insight into the impact of heat treatment, and oxidation on microstructure, mechanical and thermal properties. The heat treatment (performed at 1800, 2100, 2400 oC in argon) of two-directional (2-D) pitch-fiber with charred resin carbon matrix, and three-directional (3-D) PAN-fiber with CVI carbon matrix influenced microstructure, mechanical and thermal properties. Microstructure characterized by polarized light microscopy (PLM), XRD, and Raman spectroscopy changed with increasing heat treatment temperature. The RL microstructure of 3-D C/C progressively highly organized, whereas ISO microstructure of 2-D C/C's charred resin hardly organized into an ordered structure as evident from Raman spectroscopy and Raman profiling of polished samples. Pitch-fiber organized more than the ISO microstructure of charred resin matrix. On the other, PAN-fiber became more ordered, but was organization was lower than pitch-fiber. Thermal conductivity increased for both (2-D, 3-D C/C) materials in comparison to non-heat treated (NHT) C/Cs. Thermal conductivity of oxidized samples decreased significantly than non-oxidized samples. In-plane thermal conductivity of 3-D C/C was much higher than that of 2-D C/C, and was attributed to the rough laminar (RL) microstructure of carbon matrix and continuous PAN-fiber when compared to the short pitch-fiber in isotropic (ISO) carbon matrix. Mechanical properties (tensile, compressive, shear) deteriorated with increasing heat treatment. However, statistical analysis using ANOVA showed that there was not any significant difference between the NHT and heat treated C/C materials in terms of mechanical strength, modulus, failure strain and fracture energy. The oxidized samples of heat treated (1800/2100/2400 oC) C/C materials (2-D, 3-D) showed an appreciable decrease in mechanical strength and modulus than non-oxidized samples, with progressively heat treated C/C becoming more oxidation resistant than NHT C/C. The study demonstrated a highly inhomogeneous nature of C/C, and sample size is a very important parameter in governing mechanical properties. Since, the slightest change in the dimension of samples could bring about a radically different outcome in terms of mechanical properties, and can hardly be representative of the bulk properties. Therefore, in order to obtain a good estimate of the bulk properties, the sample size must be comparable to the bulk material. The research nonetheless showed the impact of sample size in estimating the mechanical properties of bulk properties, which are highly significant after statistical analysis, and, therefore, it must be taken into account to understand the processing-structure-property-analysis relationships.

Esta dissertação visa identificar as variáveis que possuem maior influência sobre os resultados de campanhas de publicidade digital. Para levantar possíveis variáveis que interferem na taxa de cliques (click-through rate) nos anúncios online, inicialmente foi realizada uma revisão da literatura disponível sobre o tema. Para tanto, utilizou-se como estrutura conceitual o modelo da Teoria da Informação para categorização dos fatores encontrados. A partir dessa categorização, foram selecionados fatores para um projeto de experimento fatorial utilizando análise de variância (ANOVA). Os fatores escolhidos foram a segmentação do público-alvo por gênero, o segmento econômico do anunciante e características do anúncio: cor, presença de animação e frase de chamada para ação (call to action). O experimento concluiu que a ausência de frase de chamada para ação (call to action), imagens estáticas sem animação e a aderência do público-alvo a ser atingido pela campanha ao publico do produto anunciante são as características que apresentam uma performance significativa para taxas de cliques. As conclusões do estudo apontam direcionamentos úteis para as empresas que investem em mídia digital e elaboram campanhas online de publicidade. Do ponto de vista acadêmico, a revisão da literatura e o projeto de experimento deste estudo fornecem evidências para o entendimento das principais variáveis de influência sobre este tipo de projeto. / This master thesis aims to identify factors that influence on the results of digital advertising campaigns. To understand what can increase the digital click-through rate in these campaings, the first part of this research addressed a literature review about academic and professional studies about the influencing factors of these campaigns. The identified factors were organized in three main categories from the information-processing theory: source, message and recipient dimensions. These factors were then analyzed by means of a factorial experiment project using analysis of variance (ANOVA). The factors chosen were target gender, the advertiser’s economic segment and the advertisment characteristics: color and presence of animation and call to action. The experiment concluded that some factors were meaningful for the increase of the click-through rate. The fit between advertising campaign and the advertiser’s product target, absence of call to action phrase and non-animated banners presented meaningful increases in the performances of the banners click-through rates. The conclusions of this study point useful directions for digital media advertisers. From academic point of view, the literature revision and the analysis of variance in this research provide evidences for the understanding the main influence factors in this kind of projects.

Submitted by Gabriel Giampietro de Andrade (andrade.gabriel01@gmail.com) on 2018-04-10T18:26:39Z No. of bitstreams: 1 DISSERTAÇÃO - GIAMPIETRO V11 (FINAL).pdf: 5824886 bytes, checksum: 3a8eda7139617ddad4d5a2e432066cb3 (MD5) / Approved for entry into archive by Cristina Alexandra de Godoy null (cristina@adm.feis.unesp.br) on 2018-04-12T17:23:38Z (GMT) No. of bitstreams: 1 andrade_gg_me_ilha.pdf: 5824886 bytes, checksum: 3a8eda7139617ddad4d5a2e432066cb3 (MD5) / Made available in DSpace on 2018-04-12T17:23:38Z (GMT). No. of bitstreams: 1 andrade_gg_me_ilha.pdf: 5824886 bytes, checksum: 3a8eda7139617ddad4d5a2e432066cb3 (MD5) Previous issue date: 2018-03-06 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A soldagem é um processo de fabricação utilizado em geral para união de peças e quando utiliza o laser como fonte de calor, denomina-se soldagem a laser. Um tipo bem conhecido é a soldagem a laser Nd:YAG pulsado, utilizado em diferentes tipos de materiais. Um dos materiais mais utilizados na engenharia é o aço inoxidável que possui alta resistência à corrosão, como por exemplo o aço AISI 904L, muito utilizado em tanques de armazenamento de ácido sulfúrico e fosfórico além de ampla aplicação na indústria petroquímica. Conduziu-se uma soldagem à laser Nd: YAG pulsado em chapas de aço inoxidável AISI 904L com espessura de 3 mm, variando-se quatro fatores tais como Potência de pico (PP) , Largura temporal (w), Frequência (F) e Velocidade de soldagem (S), todos eles distribuidos em três níveis de variação. Foi feito um Planejamento Experimental através do Método Taguchi, utilizando-se uma matriz ortogonal L9 e portanto realizando-se 9 experimentos em condições diferentes. A soldagem foi executada em atmosfera protetora com gás Argônio com fluxo de gás de 15 l/min, com deslocamento automatizado. A energia de cada pulso variou de 30 a 38,4J e a energia de soldagem entre 1,5 e 3,2 kJ/mm; as taxas de sobreposição variaram de 60 a 83%. As amostras foram preparadas para metalografia e atacadas com Ácido Oxálico 10% eletrolítico, com 6V e 7 segundos. Apesar da maioria das amostras romperem na Zona Fundida (ZF), a resistência mecânica ficou muito próxima do valor encontrado para o Metal Base (MB). Para o MB, ZT e ZF, os valores médios de microdureza obtidos foram 215, 242 e 238 HV respectivamente, indicando uma soldagem praticamente homogênea, em que a zona fundida apresentou em sua microestrutura apenas fase austenitica assim como o metal base, sendo possível observar alguns defeitos característicos de solidificação como bolhas e trincas. Foi feita uma análise pelo Método Taguchi utilizando os valores médio de resposta e razão sinal-ruído em gráficos complementada por ANOVA com teste de Fisher em que as respostas principais foram limite de escoamento, limite de resistência a tração, limite de ruptura e dureza, indicando os parâmetros ótimos para cada caso. / Welding is a manufacturing process used for joing parts and when a laser is utilized as a heat source, its called Laser Welding. A very known type is the pulsed Nd: YAG Laser Welding, that is used in many different kinds of materials. One of the most applied materials in engineering is the stainless steel that is highly corrosion resistant, for example the AISI 904L that is frequent used in sulfuric and phosphoric acid storage tanks, besides the petrochemical industry. Was carried out a pulsed Nd:YAG laser welding in AISI 904L stainless steel sheets with 3 mm of thickness, varying four factors such as Peak Power (PP), Time width (w), Frequency (F) and Welding Velocity (v), all of them distributed in three levels. A Design of Experiment was made through the Taguchi Method, using a L9 ortogonal array and therefore conducting nine experiments in different conditions. The welding was performed in argon gas flow of 15l/min, with automatic displacement. Pulse energy varied since 30 to 38,4J and welding energy from 1,5 to 3,2 kJ/mm; the overlay rates varied between 60 and 83%. Samples were prepared for metallography and etched with Oxalic Acid 10%, eletrolitic in 6v and 7 seconds. Although most of the samples broke in the Weld Zone (WZ), the mechanical resistance stayed very closer to the values found in Base Metal (BM). For BM, TZ and WZ, the mean values of hardness was 215, 242 and 238 HV respectively, pointing a homogeneous welding wherein the WZ presented only austenitic phase as well as the BM, being possible to observe some solidification characteristics defects as bubbles and cracks. An analysis was performed by the Taguchi Method ploting the main responses and the signal-noise ratio with the parameters, supported by an ANOVA with Fisher’s test in wich the main responses was the yield strength, tensile strength, fracture strength and hardness, indicating optimal parameters for each case.

Esta dissertação visa identificar as variáveis que possuem maior influência sobre os resultados de campanhas de publicidade digital. Para levantar possíveis variáveis que interferem na taxa de cliques (click-through rate) nos anúncios online, inicialmente foi realizada uma revisão da literatura disponível sobre o tema. Para tanto, utilizou-se como estrutura conceitual o modelo da Teoria da Informação para categorização dos fatores encontrados. A partir dessa categorização, foram selecionados fatores para um projeto de experimento fatorial utilizando análise de variância (ANOVA). Os fatores escolhidos foram a segmentação do público-alvo por gênero, o segmento econômico do anunciante e características do anúncio: cor, presença de animação e frase de chamada para ação (call to action). O experimento concluiu que a ausência de frase de chamada para ação (call to action), imagens estáticas sem animação e a aderência do público-alvo a ser atingido pela campanha ao publico do produto anunciante são as características que apresentam uma performance significativa para taxas de cliques. As conclusões do estudo apontam direcionamentos úteis para as empresas que investem em mídia digital e elaboram campanhas online de publicidade. Do ponto de vista acadêmico, a revisão da literatura e o projeto de experimento deste estudo fornecem evidências para o entendimento das principais variáveis de influência sobre este tipo de projeto. / This master thesis aims to identify factors that influence on the results of digital advertising campaigns. To understand what can increase the digital click-through rate in these campaings, the first part of this research addressed a literature review about academic and professional studies about the influencing factors of these campaigns. The identified factors were organized in three main categories from the information-processing theory: source, message and recipient dimensions. These factors were then analyzed by means of a factorial experiment project using analysis of variance (ANOVA). The factors chosen were target gender, the advertiser’s economic segment and the advertisment characteristics: color and presence of animation and call to action. The experiment concluded that some factors were meaningful for the increase of the click-through rate. The fit between advertising campaign and the advertiser’s product target, absence of call to action phrase and non-animated banners presented meaningful increases in the performances of the banners click-through rates. The conclusions of this study point useful directions for digital media advertisers. From academic point of view, the literature revision and the analysis of variance in this research provide evidences for the understanding the main influence factors in this kind of projects.

CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / O Concreto AutoadensÃvel (CAA) possui propriedades intrÃnsecas que o distingue do atual concreto convencional. SÃo fatores como capacidade de autoadensamento, grande quantidade de finos e uso obrigatÃrio de aditivo superplastificante que tornam o CAA um material de elevado desempenho, favorÃvel para a durabilidade, sendo considerado uma evoluÃÃo na tecnologia do concreto e propenso a se tornar o concreto convencional do futuro. Por outro lado, o resÃduo originÃrio da prÃpria indÃstria da construÃÃo civil tem despertado sÃrias preocupaÃÃes para a comunidade, pois se trata de um resÃduo de difÃcil descarte e gerado em volumes cada vez mais crescentes, dado o crescimento econÃmico do PaÃs com consequente aumento do poder aquisitivo da populaÃÃo. Sob esta Ãtica, analisou-se o potencial de produÃÃo do CAA com substituiÃÃo do agregado graÃdo natural (AGN) por agregados reciclados oriundos da reciclagem de concreto, chamado de agregado graÃdo reciclado (AGR), nas porcentagens de 0%, 10%, 20% e 30%. Sabendo que o agregado reciclado, em geral, possui caracterÃsticas distintas do agregado natural, a metodologia empregada iniciou com o tratamento do AGR e caracterizaÃÃo fÃsica de todos os agregados (convencionais e reciclados). Efetuou-se, entÃo, o estudo de dosagem para as relaÃÃes a/c de 0,35, 0,45 e 0,55. ApÃs, estudaram-se um total de 12 traÃos de CAA para avaliaÃÃo de suas propriedades no estado fresco e no estado endurecido. Os ensaios no estado endurecido foram: resistÃncia à compressÃo axial aos 28 e 56 dias, mÃdulo de elasticidade aos 56 dias, absorÃÃo de Ãgua por imersÃo aos 28 dias, Ãndice de vazios aos 28 dias, massa especÃfica real aos 28 dias e profundidade de carbonataÃÃo natural aos 200 dias. Procedeu-se ao tratamento estatÃstico dos resultados pela anÃlise de variÃncia (ANOVA) com posterior modelagem matemÃtica e ANOVA do modelo proposto. Ao final, concluiu-se que o alto teor de aditivo superplastificante resultante do estudo de dosagem da relaÃÃo a/c mais baixa pode ter influenciado para a obtenÃÃo de concretos mais trabalhÃveis e menos suscetÃveis à incorporaÃÃo de um agregado mais poroso do que o agregado natural. TambÃm se concluiu que as propriedades dos CAA manufaturados foram afetadas mais significativamente pela relaÃÃo a/c, indicando a possibilidade de substituiÃÃo de maiores teores de AGN por AGR. / The self-compacting concrete (SCC) has intrinsic properties that distinguish it known current conventional concrete. It is factors like self-compacting capacity, high amount of fines and mandatory use of superplasticizer that make the SCC a material of high performance, favorable to the durability and is considered an evolution in concrete technology and prone to become the future conventional concrete. On the other hand, the residue originated in the construction industry itself has aroused serious concern to the community, because it is a residue difficult to discard. It is generated in ever-increasing volumes due to economic growth in the country with con sequent increase in power population's purchasing. From this perspective, we analyzed the production of SCC with replacement of natural coarse aggregate (NCA) for recycled aggregates from concrete recycling, called recycled coarse aggregate (RCA), in the percentages of 0%, 10%, 20% and 30%. Knowing that recycled aggregate, in general, has distinct characteristics of natural aggregate, the methodology started with the treatment of RCA and physical characterization of all aggregates (conventional and recycled). Then, it was done the dosage study with the w/c ratio of 0.35, 0.45 and 0.55. After, we studied a total of 12 mixtures of SCC to evaluate its properties in fresh and hardened state. The tests in the hardened state were: compressive strength at 28 and 56 days, modulus of elasticity at 56 days, water absorption by immersion at 28 days, content of voids at 28 days, specific gravity at 28 days and the depth of natural carbonation at 200 days. We proceeded to statistical processing of results by analysis of v ariance (ANOVA) followed by mathematical modeling and model‟s ANOVA. Finally, it was concluded that the high content of superplasticizer results from the dosage study of lower w/c ratio can be influenced to achieve concretes more workable and less sensitiv e to the incorporation of an aggregate more porous than the natural aggregate. It was also found that the properties of the SCC manufactured were affected more significantly by the w/c ratio, indicating the possibility of substitution of higher levels of NCA by RCA