Academic literature on the topic 'Granulometry'
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Journal articles on the topic "Granulometry"
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Palumbo, Demian Daniel, Hugo Daniel Bianchetto, Gerardo Botasso, María José Correa, and Enrique Patrón-Costas. "Methodology for the granulometric control of aggregates. Development of limit granulometric curves for quarries, adapted to road requirements." DYNA 90, no. 229 (December 15, 2023): 137–47. http://dx.doi.org/10.15446/dyna.v90n229.109296.
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The absence of specifications for the granulometry a quarry must produce causes a serious problem, making it difficult for quarries to adjust their processes to produce within the range required by clients, and for costumers, making it a difficult process to design asphalt mixes and concretes that conform to the granulometric curves established in regulations. It is essential to develop limit granulometric curves for quarries, adapted to customer requirements. In this paper, a methodology for granulometric control in the quarry is proposed, which includes the collection of process information, the preparation of control charts and the process capability analysis according to the established specifications. Moreover, an example of the development of limit granulometric curves is proposed for the quarry under study located in Argentina, in the province of Buenos Aires, which would allow to produce aggregates whose granulometry can be used in asphalt mixes CAC D19 and concrete pavements.
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Yung-Vargas, Y. W., H. A. Rondón-Quintana, and J. E. Córdoba-Maquilón. "Evaluation of recycled asphalt pavement in Colombia." Journal of Physics: Conference Series 2153, no. 1 (January 1, 2022): 012007. http://dx.doi.org/10.1088/1742-6596/2153/1/012007.
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Abstract Reclaimed asphalt pavements are obtained from existing pavements through recovery techniques and are used for new asphalt mixtures production with the inclusion of virgin aggregates and asphalt cement, constituting environmentally friendly mixtures at a lower total cost, by requiring fewer quantities of new materials. This research, unlike the studies found on the subject, focuses on the study of reclaimed asphalt pavement by analyzing its granulometric distribution and asphalt cement content. For this purpose, representative reclaimed asphalt pavement samples were taken from four Colombia cities, to verify their heterogeneity. The obtained reclaimed asphalt pavement was analyzed in the laboratory, to obtain the material granulometric distribution, through extraction and asphalt content tests, following Colombian regulations from the “Instituto Nacional de Vías”. The results show that the granulometry of all cities has a central tendency (average) that moves towards an upper limit in the 2 mm particles. When analyzing the granulometry separately of the four cities, it is observed that they present a different trend in their granulometry, which shows their heterogeneity. The asphalt cement content presented values between 4.0% and 5.0%.
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Simboh, Reyvalentin, Royke M. Rampengan, Hermanto W. K. Manengkey, Rignolda Djamaluddin, Esry T. Opa, and Hengky J. Sinyal. "Sediment Granulometry of the Beach at the Kalasey’s Groynes." Jurnal Ilmiah PLATAX 9, no. 2 (August 7, 2021): 234. http://dx.doi.org/10.35800/jip.9.2.2021.34778.
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Coastal areas have the potential to be developed and utilized for various purposes. However, the intensity of coastal use can result in the degradation of the coastal environment. Therefore, management of the coastal areas is often carried out by building shore protective structures, including groynes. The placement of a structure in the form of a groynes is primarily intended to block littoral flow in moving sediment out of certain places in the shore. Therefore, the placement of groynes on the shore needs to be followed by a study to find out the effectiveness of the groynes. The effectiveness of groynes can be determined, among others, by a study on the granulometry of sediments on the beach. This study was conducted to describe the composition of the sediment and to analyze granulometry distribution in several places at the beach around the groynes on the shore of Kalasey. The study of the physical sediments around the Kalasey groynes was carried out through a study of the sediment samples from October 30, 2020, to April 27, 2021. Sediment sampling was carried out at 6 stations which have been determined on the surface of the beach formed around the groynes. The results obtained through this research showed that the composition of the sediments in the beach around the Kalasey groynes consisted of size classes as follows: very fine sand, fine sand, medium sand, coarse sand, very coarse sand, granule, and pebble. Fine-sized materials at the beach which is located in the groynes on further east have increased in composition. Based on the granulometric analysis of the sediment, it is indicated that the erosion and deposition processes occur alternately in the beaches formed around the groynes.Keywords: Beach; Kalasey Groynes; Sediment Composition; Granulometric AnalysisAbstrakWilayah pantai memiliki potensi untuk dikembangkan dan dimanfaatkan untuk berbagai kepentingan. Walaupun demikian, intensivitas pemanfaatan pantai dapat mengakibatkan terjadinya degradasi lingkungan pantai. Oleh karena itu, dalam rangka pengelolaan pantai seringkali dilakukan dengan cara membangun struktur pelindung pantai, diantaranya berupa groin. Penempatan struktur berupa groin di kawasan pantai, dimaksudkan utamanya untuk menghadang aliran litoral dalam memindahkan sedimen keluar dari tempat tertentu di kawasan pantai. Oleh karena itu, penempatan groin di pantai perlu diikuti dengan kajian untuk melihat efektivitas fungsi groin pada kawasan pantai tersebut. Salah satu cara untuk melihat efektivitas kerja groin di pantai adalah melalui kajian menyangkut granulometri sedimen gisik yang terhampar di sekitar groin yang ditempatkan. Penelitian ini dilakukan dengan tujuan mendeskripsikan komposisi sedimen dan menganalisis distribusi granulometri di beberapa tempat pada gisik sekitar groin di pantai Kalasey. Kajian terhadap sedimen gisik sekitar groin Kalasey dilakukan melalui telaah terhadap sampel sedimen yang dicuplik mulai 30 Oktober 2020 sampai dengan 27 April 2021. Pencuplikan sedimen dilaksanakan di 6 stasiun yang ditetapkan pada permukaan gisik yang terbentuk di sekitar groin Kalasey. Hasil yang diperoleh melalui penelitian ini adalah komposisi sedimen pada gisik di sekitar groin Kalasey terdiri dari kelas ukuran berupa pasir sangat halus, pasir halus, pasir sedang, pasir kasar, pasir sangat kasar, granul, dan kerakal. Gisik yang terletak pada kawasan groin semakin ke arah Timur pada kawasan ini, komposisi sedimennya mengalami peningkatan jumlah material sedimen yang berukuran halus. Berdasarkan analisis granulometri sedimen terindikasi bahwa proses erosi dan deposisi terjadi secara bergantian pada gisik-gisik yang terbentuk di sekitar groin.Kata kunci: Gisik; Groin Kalasey; Komposisi Sedimen; Analisis Granulometri
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Carmona, E., J. Ordovás, M. T. Moreno, M. Avilés, M. T. Aguado, and M. C. Ortega. "Granulometric Characterization and Alteration during Composting of Industrial Cork Residue for Use as a Growing Medium." HortScience 38, no. 6 (October 2003): 1242–46. http://dx.doi.org/10.21273/hortsci.38.6.1242.
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This work describes the granulometry of industrial cork residue (bark of Quercus suber L.) and its possible alteration during composting to eliminate the high content of phytotoxic substances. Because of the differences in density of the different-sized cork particles, expression of the granulometric distribution in relation to volume reflected the size distribution more accurately than its expression in relation to weight. As a consequence, predictions of the physical and hydrological behavior of the substrate, deduced from its granulometry, were more accurate when this was calculated in relation to volume. Objective parameters used for textural comparison, such as the geometric mean (dg) and standard deviation of particle size (σg), which were previously used in soils, were tested. These permit the estimation of small differences in the particle size of different lots or the granulometric alteration occurring during composting. With the same purpose, a new diagram of textures for the classification of granular substrates was also studied.
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Suriani, Putri Dwi, M. Haris Miftakhul Fajar, Nita Ariyanti, Ayu Putri Ramadhani, Faqih Ulumuddin, Helda Kusuma Rahayu, Mahendra Wirayudhatama, Marsha Khairia Alfany, Muhammad Erfand Dzulfiqar Rafi, and Syabibah Zakiyyah Zukhrufah. "Sediment Deposits Texture Analysis of Besuk Kobokan River in the Northern Slope Semeru Volcano Lumajang." IOP Conference Series: Earth and Environmental Science 1307, no. 1 (February 1, 2024): 012025. http://dx.doi.org/10.1088/1755-1315/1307/1/012025.
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Abstract The flow of volcanic material from Semeru Volcano as one of the most active volcano on Java Island is still flowing and deposited along the Besuk Kobokan River which empties into Bambang Beach, Lumajang. The sediments as volcanic products are transported through the river environment with water as its transport agent. This transportation and deposition process has certain grain texture characteristics that can be identified through granulometry analysis. Geological observations and sediment sampling were carried out at 8 points along the Besuk Kobokan River. Granulometry analysis aims to identify the grain texture distribution of Semeru Volcano sediments that have been transported. The results of granulometric analysis that can identify the distribution of grain texture show that the first point to the fifth point at the sampling location was influenced by lahars flow and pyroclastic flow, resulting in randomness in grain size and rock texture. While the sixth to eighth points show the fluvial sedimentation process.
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Robert, Frédérique, and Guy Lefebvre. "Granulometry on Riprap Images." Microscopy Microanalysis Microstructures 7, no. 5-6 (1996): 393–97. http://dx.doi.org/10.1051/mmm:1996137.
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Rebouças, Renata Cardia, and Felipe Castro. "MÉTODOS CLÁSSICOS DE SEDIMENTOLOGIA APLICADOS À IDENTIFICAÇÃO DE DEPÓSITOS COSTEIROS COMO FERRAMENTA AO LICENCIAMENTO AMBIENTAL (CLASSICAL METHODS OF SEDIMENTOLOGY APPLIED TO THE IDENTIFICATION OF COASTAL DEPOSITS AS A TOOL TO THE ENVIRONMENTAL LICENSING)." Revista GeoNordeste, no. 1 (July 5, 2019): 180–99. http://dx.doi.org/10.33360/rgn.2318-2695.2019.i1p180-199.
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RESUMO:A classificação de ambientes costeiros pode ser uma tarefa complexa. O estudo da geomorfologia na identificação de ambientes sedimentares necessita de uma validação. Não raro, feições como cordões litorâneos são confundidas com dunas. O depósito sedimentar em forma de dunas fica melhor caracterizado quando realizados estudos sedimentológicos, nos quais são observados os parâmetros granulométricos e a morfoscopia dos grãos. Neste trabalho estes métodos clássicos de sedimentologia foram aplicados aos sedimentos de testemunhos coletados na planície costeira da localidade de Mosqueiro (SE). A análise granulométrica e morfoscópica mostrou que, apesar de os sedimentos possuírem algumas características peculiares às areias de dunas, como uma granulometria fina, assimetria positiva tendendo para os finos e distribuição leptocúrtica da curva gaussiana, os sedimentos apresentam outras características como a seleção moderada e a superfície predominantemente polida que indicam que estes depósitos não foram formados exclusivamente pelo transporte eólico. O transporte misto, ora pela água, ora pelo vento, aponta para um ambiente de cordões litorâneos. Embora estes depósitos não tenham sido considerados dunas, é importante não construir na faixa de variação natural da praia para se evitar problemas com erosão costeira, bem como garantir a conservação ambiental e a segurança das pessoas e do patrimônio.Palavras-chave: Granulometria; Morfoscopia; Dunas; Cordões Litorâneos. ABSTRACT:The classification of coastal environments could be a complex task. The study of geomorphology in the identification of sedimentary environments requires validation. Often, features like beach ridges are confused with dunes. The sedimentary deposit in the form of dunes is better characterized when sedimentological studies are carried out, in which granulometric parameters and grain morphoscopy are observed. In this work, these classical methods of sedimentology were applied to the sediments of the samples collected in the coastal plain of Mosqueiro (SE). The granulometric and morphoscopic analysis showed that, although the sediments have some characteristics peculiar to the sand dunes, such as fine granulometry, positive asymmetry tending to the fines and leptokurtic distribution of the Gaussian curve, the sediments present other characteristics such as moderate selection and surface that indicate that these deposits were not formed exclusively by the wind transport. The mixed transport, sometimes by the water, or by the wind, points to an environment of coastal strings. Although these deposits have not been considered as dunes, it is important not to build on the natural range of the beach to avoid problems with coastal erosion, as well as to guarantee environmental conservation and the safety of people and property.Keywords: Granulometry; Morphoscopy; Dune; Beach Ridges.
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Rosères, Charles, Léo Courty, Philippe Gillard, and Christophe Boulnois. "Burning Velocities of Pyrotechnic Compositions: Effects of Composition and Granulometry." Energies 15, no. 11 (May 26, 2022): 3942. http://dx.doi.org/10.3390/en15113942.
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Burning velocities of binary and ternary pyrotechnic compositions are measured in gutter. The study focuses on the determination of the joint influence of several parameters: oxidant/reducer ratio, reducer granulometry, and binder content. Measurements are performed following the standard NF T70-541 for burning velocity estimation using an optical acquisition method. Binder content has a linear influence on the burning velocity with a pivot point in slope at supposed stoichiometry. Changing the granulometric class of metallic reducer shows to have different influences before and beyond a 20% diameter reduction.
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Plesiński, Karol. "Wpływ rumoszu drzewnego na granulometrię osadów korytowych." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 27, no. 1 (April 14, 2018): 42–56. http://dx.doi.org/10.22630/pniks.2018.27.1.5.
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The aim of paper is to investigate the impact of woody debris deposited on the river bed on the granulometry of the bed material. The analysis included upstream and downstream sides of the investigated woody debris. The investigations comprised determination of the geometric dimensions of the analyzed wood deposits, determination of the granulometric composition of the bed material in the area of deposition of woody debris, determination of the range of influence of the investigated woody debris on the bed material and determination of the relationship between the geometric dimensions of the woody debris and the extent of their impact on the bed material. The granulometric analysis was conducted using the conventional sieving method. The extent of the influence of woody debris was determined on the basis of the Nash’s-Sutcliffe’s efficiency coefficient. The dependence of the extent of wood influence and the dimensions of the investigated woody debris was determined on the basis of the Spearman’s correlation coefficient. It was found that the woody debris deposited on the bed of the Raba river affects the granulometry of the bed material on both the upstream and downstream sides. The study also showed that the extent of the impact on the grain-size composition of the bed material on the downstream sides of the woody debris is determined to a large extent by the height of the deposited woody debris.
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Sapsuha, Isman, Royke M. Rampengan, Esry T. Opa, Hermanto K. Manengkey, Wilmy K. Pelle, and Ferdinand F. Tilaar. "KEMIRINGAN LERENG DAN GRANULOMETRI SEDIMEN GISIK TANJUNG MERAH, BITUNG SULAWESI UTARA." JURNAL PESISIR DAN LAUT TROPIS 7, no. 2 (July 17, 2019): 90. http://dx.doi.org/10.35800/jplt.7.2.2019.24197.
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Beach slope and sediment granulometry is one of the importat aspect in coastal management. Beach offers a variety of functions and potential to be utilized. In the interests of phisical use in the beach, coastal structure in the form of groynes has been built. Actually, the groin has been used as a dock. This research was conducted with the aim of revealing the slope and granulometry sediment in Tanjung Merah beach. The results obtained, the beach slope is considered sloping and very sloping, the composition of the sediment consists mainly of medium sand, fine sand and very fine sand. Sediment distribution analysis obtained results, the main grain size was mainly in the form of medium sand, sorting was mainly classified as poor, skewness was mostly asymmetrie strong to large size, most curtosis was mesokurtic. The results of the study indicate the occurrence of the process of erosion and deposition ia certain spaces on the beach studied.Keywords: Tanjung Merah, beach slope, sediment granulometryKemiringan lereng dan granulometri sedimen gisik merupakan salah satu aspek penting dalam pengelolaan pantai. Gisik menawarkan beragam fungsi dan potensi untuk dimanfaatkan. Dalam kepentingan pemanfaatan lahan gisik, berbagai modifikasi dilakukan oleh manusia. Pada gisik di Tanjung Merah, telah dibangun struktur pantai berupa groin. Secara aktual, groin tersebut telah difunsikan sebagai dermaga. Penelitian ini dilakukan dengan tujuan mengungkapkan kemiringan dan granulometri sedimen di gisik Tanjung Merah. Hasil penelitian yang diperoleh, lereng gisik terkriteria miring dan sangat miring, komposisi sedimen terutama terdiri dari pasir sedang, pasir halus, dan pasir sangat halus. Analisis distribusi memperoleh hasil, rataan empirik terutama berupa pasir sedang, penyortiran terutama terklasifikasi buruk, kemencengan terbanyak berupa asimetris kuat ke ukuran besar, peruncingan terbanyak berupa mesokurtik. Hasil studi mengindikasikan terjadi proses erosi dan deposisi pada ruang-ruang tertentu di gisik yang ditelaah.Kata kunci : Tanjung Merah, kemiringan lereng, granulometri sedimen
Dissertations / Theses on the topic "Granulometry"
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Scaramutti, Alvarez Nadielka Alejandra, and Llanovarced Pool Daryl Vásquez. "Influencia de la variabilidad de la granulometria del agregado en la deformación permanente de micropavimentos para el proyecto de conservación vial complementario Huancavelica tramo V: Acobamba-Puente Alcomachay." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653196.
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El Micropavimento es una técnica utilizada mundialmente para el mantenimiento de carreteras debido a sus propiedades de trabajabilidad y de rotura controlada en la mezcla asfáltica que permite una rápida apertura al tráfico comparado con otros tipos de tratamientos superficiales. El ahuellamiento es un tipo de falla que afecta seriamente el desempeño de los micropavimentos y que tiene un impacto directo en la vida útil. La metodología empleada por International Slurry Surfacing Association (ISSA), en la cual se basa el manual de carreteras de especificaciones técnicas generales para construcción (EG 2013), recomienda una serie de especificaciones para el desarrollo de los ensayos de desempeño en el laboratorio que buscan evitar la presencia del ahuellamiento en el Micropavimento. Sin embargo, dentro de las limitaciones encontradas en esta metodología se evidencia que los agregados entre las mallas N° 30 y mayores a 200 que presentan valores muy cercanos al límite inferior del huso tipo III producen una falta de confinamiento entre los componentes de la mezcla asfáltica, lo cual ocasiona la falla por ahuellamiento.
El objetivo de esta investigación fue evaluar la influencia de la variabilidad granulométrica del agregado en la deformación permanente de Micropavimentos. Además de brindar una propuesta de mejora a la EG 2013 respecto al desempeño del micropavimento, previniendo así el problema presentado líneas arriba para agregados con caracterización similar a la cantera Río Mantaro.The Micropaviment is a technique used worldwide for the maintenance of roads due to its workability and controlled breakage properties in the asphalt mix that allows rapid opening to traffic compared to other types of surface treatments. The collapse is a type of failure that seriously affects the performance of the Micropavimento and has a direct impact on the useful life. The methodology used by the International Slurry Surfacing Association (ISSA), on which the road manual of general technical specifications for construction is based (EG 2013), recommends a series of specifications for the development of performance tests in the laboratory that seek to avoid the presence of the sagging in the Micropavimento. However, within limitations found in this methodology it is evident that aggregates between meshes No. 30 and greater than 200 that present values very close to the type III spindle produce a lack of confinement between the components of the asphalt mixture, which causes the failure by collapse. The objective of this investigation was to evaluate the influence of the granulometric variability of the aggregate on the permanent deformation of Micro surfacing. In addition, a proposal to improve the EG 2013 respect to the performance of the Micro surfacing, this preventing the problem presented above for aggregates with similar characterization to the Rio Mantaro quarry.
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Rzadca, Mark C. "Multivariate granulometry and its application to texture segmentation /." Online version of thesis, 1994. http://hdl.handle.net/1850/12200.
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Arcari, Marcos André. "Efeito da vitreosidade, granulometria e inoculante bacteriano sobre a composição e qualidade de silagens de milho e sorgo reidratados." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/10/10135/tde-20022018-142816/.
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Estudos prévios indicaram que a reidratação e ensilagem de milho moído aumentam a digestibilidade do amido de acordo com o avanço do tempo de ensilagem. Deste modo, a substituição do milho seco moído por silagem de milho reidratado (SMR) na dieta de vacas leiteiras pode aumentar a digestibilidade do amido e da proteína dos grãos, e consequentemente o desempenho de vacas leiteiras. Entretanto, ainda não foram realizados estudos que avaliaram a influência da granulometria, uso de inoculante bacteriano e vitreosidade de grãos de milho e sorgo sobre a composição, qualidade e digestibilidade da SMR ao longo do tempo de ensilagem. Além disso, são escassos os estudos sobre a inclusão de silagem de milho reidratado em dietas de vacas leiteiras com variação do teor de PB e de proteína degradável no rúmen (PDR). Para investigar a influência do uso de inoculante, da granulometria, do teor de vitreosidade e do tempo de ensilagem sobre as características de composição da silagem de milho e sorgo reidratado e da variação do teor e degradabilidade da proteína em dietas de vacas leiteiras que utilizam SMR foram desenvolvidos um conjunto de 5 experimentos. As variáveis resposta avaliadas foram o desempenho produtivo e balanço de nitrogênio de vacas leiteiras alimentadas com SMR (Exp 1 e 2) e a composição química, o perfil fermentativo e a digestibilidade do amido e da proteína da silagem ao longo do período de ensilagem (Exp 3, 4 e 5). Desta forma, este estudo foi organizado em 5 experimentos sequenciais, sendo dois (Exp. 1 e 2) com uso de vacas em lactação e os demais (Exp. 3, 4 e 5) com o uso de mini-silos experimentais. Os objetivos específicos dos Exp. 1 e 2 foram avaliar o efeito de: 1) teor de proteína bruta (130, 160 e 180 g PB/kg MS) em dietas de vacas leiteiras com substituição total do milho seco moído por SMR, 2) teor de proteína degradável no rúmen (PDR) por meio da variação do teor de ureia da dieta de vacas leiteiras (80, 100 e 120 g PDR/kg PB) com substituição total do milho seco moído por SMR. Para os Exp. 1 e 2, foram utilizadas 15 vacas Holandesas em estágio intermediário de lactação (> 100 < 200 dias), com peso vivo de aproximadamente 550 kg, distribuídas em delineamento quadrado latino com 5 quadrados contemporâneos 3 × 3 com 3 períodos de 21 dias e 3 tratamentos. As vacas foram alojadas em estábulo tipo free-stall, alimentadas duas vezes ao dia com controle individual de consumo de alimentos e regime de duas ordenhas/dia. Nos Exp. 1 e 2, as variáveis resposta avaliadas foram: consumo de nutrientes, digestibilidade aparente total, produção e composição do leite, parâmetros fermentativos do rúmen e balanço de nitrogênio. Os Exp. 3, 4 e 5 foram realizados em mini silos experimentais (500g) com silagem de milho e sorgo reidratados, cujos objetivos foram avaliar sobre as variáveis resposta, respectivamente, o efeito de: 3) do teor de vitreosidade (baixo, médio e alta) de 3 cultivares de milho, da inclusão de inoculante (Lactobacilus buchneri) ou não e do tempo de ensilagem (0, 15, 30, 60, 120, 240 e 400 dias); 4) granulometria (inteiro, 8, 2 e 1mm) de milho alta vitreosidade, do uso de inoculante (controle ou Lactobacilus buchneri) e do tempo de ensilagem (0, 15, 30, 60, 120, 240 e 400 dias); 5) granulometria (8, 2 e 1mm) de 1 cultivar de sorgo, do uso de inoculante (Controle; Lactobacilus buchneri; Lactobacilus plantarum e Pediococus acidilactici e Lactobacilus buchneri (50%) + Lactobacilus plantarum e Pediococus acidilactici (50%)) e do efeito do tempo de ensilagem (0, 15, 30, 120 e 360 dias). As variáveis resposta analisadas nos experimentos 3, 4 e 5 foram a composição química da silagem (MS, PB, proteína solúvel, amido, N-NH3, pH) e digestibilidade in situ em 7 horas do amido e da proteína da silagem. Para o experimento 5 foram ainda avaliados a produção e composição dos gases de fermentação. A silagem de grãos de milho e sorgo reidratados apresentaram características peculiares de fermentação e aumento de digestibilidade de acordo com o tamanho de partícula, vitreosidade, uso de inoculante ao longo do tempo de ensilagem. Os resultados observados no presente conjunto de experimentos sugerem que particularidades inerentes ao processamento prévio a ensilagem, inoculação ou aos híbridos utilizados para confecção da silagem podem influenciar na melhoria da conservação e digestibilidade da silagem. Além disso, o uso de silagem de milho reidratado, mesmo apresentando alta digestibilidade aparente total do amido, não possibilitou o uso de menor teor de PB ou maior teor de PDR que aqueles preditos pelo NRC 2001.Previous studies have indicated that the inclusion of ground rehydrated corn silage (RCS) in dairy cows diet can increase the starch digestibility and the grain protein, increasing the dairy cows performance. However, no studies were carried out to evaluate the influence of grain particle size, bacterial inoculant use and grain vitreousness of corn and sorghum on the composition, quality and digestibility of RCS throughout the ensiling time. In addition, there are few studies about inclusion of RCS in dairy cows diet with some variation of CP content and rumen degradable protein (RDP). To investigate the influence of inoculant use, granulometry, vitreousness content and ensilage time on the chemical composition of ground rehydrated corn and sorghum silage, and the protein content variation and degradability in dairy cow diets, there were developed a set of 5 experiments. The variables evaluated were the productive performance and nitrogen balance of dairy cows fed RCS (Exp 1 and 2) and the chemical composition, fermentative profile and digestibility of the silage and starch during the ensiling time (Exp 3, 4 and 5). Thus, this study was organized in 5 sequential experiments, in which two of them (Exp. 1 and 2) used lactating cows and the others (Exp 3, 4 and 5) used experimental mini silos. The specific objectives of Exp. 1 and 2 were to evaluate the effect in dairy cows diet of: 1) CP content (130, 160 and 180 g CP/kg DM) with total substitution by RCS, 2) RDP content by urea content variation (80, 100 and 120 g RDP / kg PB) with total substitution of ground dry corn by RCS. For Exp. 1 and 2, there were used 15 Holstein cows in third lactation (> 100 <200 days), approximately 550 kg BW, distributed in a 3 × 3 latin square design with 5 contemporary squares, with 3 periods of 21 days and 3 treatments. The cows were alocated in a free-stall, fed twice a day with a feed intake individual control and twice milking per day. In Exp. 1 and 2, the variables evaluated were: nutrient intake, total apparent digestibility, milk yield and composition, rumen fermentative parameters and nitrogen balance. The experiments 3, 4 and 5 were carried out in experimental mini silos (500g) with rehydrated corn and sorghum silages, that aimed to evaluate the effect of: 3) the vitreousness content (low, medium and high) of corn cultivars, the inclusion of inoculant (Lactobacilus buchneri) or not and the ensilage time (0, 15, 30, 60, 120, 240 and 400 days); 4) granulometry (whole, 8, 2 and 1mm) of high vitreousness corn, the inclusion or not of inoculant (Lactobacilus buchneri) and the ensilage time (0, 15, 30, 60, 120, 240 and 400 days); 5) granulometry (8, 2 and 1 mm), bacterial inoculant (Lactobacillus buchneri, Lactobacillus plantarum and Pediococus acidilactici and Lactobacillus buchneri (50%) + Lactobacilus plantarum and Pediococus acidilactici (50%)) and the ensiling time (0, 15, 30, 120 and 360 days) of rehydrated sorghum grain. The variables analyzed in experiments 3, 4 and 5 were the chemical composition of silage (DM, CP, soluble protein, starch, N-NH3 and pH) and 7-hour in situ digestibility of the starch and silage protein. For the experiment 5, the production and composition of the rumen fermentation gases were also evaluated. The rehydrated corn and sorghum silages has particular characteristics of fermentation and increase the digestibility according to the particle size, vitreousness and use of inoculant throughout the ensiling time. The results observed in the present set of experiments suggest that the particularities associated with the previous ensiling process, inoculation or the hybrids used to make the silage may influence the conservation and the digestibility. In addition, the use of rehydrated corn silage, even with high starch apparent total digestibility, did not allow the use of lower CP content or higher RDP content than those predicted by NRC 2001.
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Lara, Arnaldo Câmara. "Descritor de bordas e quantização espacial flexível aplicados a categorização de objetos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-29042013-111855/.
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A área de reconhecimento de objetos tem assistido a um impressionante progresso na última década. O estudo de descritores, aliado à estratégias de amostragem usando quantizações espaciais e a combinação de classificadores têm permeado o estado da arte nos últimos anos. Neste trabalho é proposta uma nova quantização espacial com número arbitrário de níveis e subdivisões arbitrárias de regiões. Regiões adjacentes possuem sobreposição gerando redundância na representação destas regiões de fronteiras e, assim, evitando as quebras que acontecem nas pirâmides espaciais tradicionais que prejudicam a interpretação das formas. Apesar de melhorar o desempenho da abordagem do saco de palavras, as pirâmides espaciais não são robustas a variações na orientação dos objetos na imagem. Foi também proposto neste trabalho, uma divisão espacial utilizando regiões circulares concêntricas que aumentam a robustez a rotação dos objetos na imagem em aproximadamente 80% quando comparada às pirâmides espaciais. Além das novas divisões espaciais, é proposto neste trabalho um novo descritor baseado na aplicação de granulometria morfológica no mapa de bordas da imagem original. Este descritor foi utilizado na criação de modelos de classes em aplicações de categorização de objetos utilizando uma base de dados pública com resultados superiores aos do melhor descritor baseado em bordas reportado pela literatura. Todas estas novas técnicas propostas foram utilizadas em um problema desafiador de categorização de objetos de classes muito parecidas. Foi utilizado um subconjunto da base de pássaros Caltech-UCSD Birds-200 2011 com resultados comparáveis aos melhores resultados reportados pela literatura. A abordagem proposta cria uma classificação de dois níveis e utiliza modelos específicos por classe o que é intuitivo, pois cada espécie de pássaro possui características muito sutis que as diferenciam das demais espécies testadas. Vários descritores são utilizados na criação dos modelos de classes e uma combinação de classificadores gera a rotulação final para a amostra. O descritor proposto neste trabalho esteve presente no melhor modelo de 11 das 13 classes testadas e o resultado final obtido pela técnica de categorização proposta é o melhor resultado utilizando a abordagem do saco de palavras.The object recognition area has experienced an impressive progress in the last decade. The study of descriptors, together with a sampling strategy using spatial quantization and the combination of classifiers have been presented in the state of art in recent years. This work proposes a new spatial quantizations with an arbitrary number of levels and divisions in each level. Adjacent regions have overlapping areas that generate redundant representation and avoid breakages in the structures that are in their border regions as it happens in the traditional spatial pyramids and impairs the correct interpretation of these structures. Despite spatial pyramids to improve the performance of the bag-of-words approach in object recognition, they are not robust to changes in object orientation in the image. It was also proposed, in this work, a spatial division using concentric circular regions that is almost 80% more robust to rotation of objects when compared to the spatial pyramids using rectangular divisions. In addition to the new spatial division of the image, it is proposed a new granulometric-based descriptor that it is applied to the map of edges of the original image. This descriptor was used in the building of categorys models for object categorization in a public database and showed a better performance than the most used edge-based descriptor reported in literature. All these new proposed techniques were used in a challenge problem of object categorization of very similar classes. It was used a subset of the public database Caltech-UCSD Birds-200 2011 and the method obtained results compared to the best results reported in the literature. The proposed approach uses a 2-level classification and builds class-specific models that are an intuitive way to model the species of birds as very subtle characteristics differ in each tested class of birds. Many descriptors are used in the building of models of species and a combination of classifiers generates the final label for a tested sample. The descriptor proposed here were presented in 11 of 13 best models of birds classes. The final result obtained by the proposed object categorization method is the best one using the bag-of-words approach.
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Cook, Robert M. "The development of magnetic granulometry for application to heterogeneous catalysts." Thesis, University of Warwick, 2014. http://wrap.warwick.ac.uk/63943/.
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Nano-deposits of Ni and Co, supported on porous oxide materials, serve as heterogeneous catalysts within Johnson-Matthey plc. in the steam reforming and Fischer-Tropsch processes, with the size, shape and dispersity of the metal crystallites linked to the catalytic profile. Here we study the magnetic properties of nickel systems synthesised on the nano-scale, with the aim of developing an industrially viable technique by which the diameter of the nickel species can be evaluated. A series of nickel nanoparticles, synthesised via the thermal decomposition of Ni(acac)2, are studied as a model for the catalytic systems. The nanoparticles were studied via magnetometry and microscopy to identify the super-paramagnetic and nuclear volume of the particles, respectively. The magnetisation studies demonstrate that the widely used Langevin function based method of particle sizing does not reflect the total nuclear volume, and a surface correction term is introduced based on the low temperature, high applied field magnetisation. To demonstrate the applicability of the proposed analysis, the study of a series of industrially-viable precipitation catalysts are reported. The catalysts are studied via x-ray diffraction (XRD) and gas adsorption to establish comparable values of crystallite diameter. The values of crystallite diameter determined from the magnetic analysis are demonstrated to be consistent with the range of sizes determined from the XRD and gas adsorption studies, with additional sensitivity to the polydispersity of the crystallites. During the study of the precipitation catalysts, the magnetic volume was demonstrated to be reduced from the nuclear volume. This behaviour was also confirmed via small angle neutron scattering experiments, which demonstrated a magnetic scattering volume reduced from the nuclear by = 1 nm, on the order previously reported for nano-ferromagnetic materials. Through these studies we have established the methods for determining the surface correction term to magnetic granulometry studies. We have demonstrated that the corrected values are in agreement with the nuclear volumes determined via TEM, gas adsorption and XRD and that our proposed technique for the study of catalyst crystallites requires a short time scale, is insensitive to the catalytic support and is sensitive to the distribution of crystallite diameters.
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Sales, Nicolas Coelho [UNESP]. "Influência dos compostos na manufatura por impressão 3Dprinter no comportamento mecânico biomodelos." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152079.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Na medicina atual, uma técnica destaca-se cada vez mais, a biomodelagem. Esta técnica consiste na construção de um biomodelo físico a partir de imagens bidimensionais (de tomografias, ressonâncias, ultrassom), que são tratadas e através de softwares transformadas em um biomodelo virtual que por fim torna-se um biomodelo físico, impresso por uma impressora tridimensional, possibilitando a equipe médica, a percepção de detalhes dificilmente observados apenas através de imagens bidimensionais. Porém o material importado utilizado na biomodelagem é de custo elevado. Neste trabalho o objetivo foi através de uma formulação tida como ideal, publicada no artigo de (Meira), variar as porcentagens de sua composição, o ligante utilizado, o método de mistura, as granulometrias dos pós e adicionar um novo constituinte (sulfato de magnésio), e assim, adquirir um material mais barato e observar qual a influência da composição e granulometria em propriedades fundamentais para a qualidade de um pó para manufatura aditiva, tais como fluidez para distribuição homogênea, alto empacotamento das partículas para maximizar a densidade das peças, espessura da camada maior que as dimensões dos aglomerados e bom acabamento superficial após a camada ser depositada. Posteriormente, foram produzidos corpos de prova com diferentes composições, granulometrias e submetidos a ensaios de compressão e flexão três pontos. Após estes ensaios, médias e desvios padrões foram calculados para cada composição e granulometria. Por fim, a composição que apresentou os melhores resultados foi comparada ao material importado atualmente utilizado. O novo material, com custo de produção por volta de dez vezes menor, atendou às necessidades mecânicas que um biomodelo exige, como por exemplo, resistência mínima ao manuseio.
In modern medicine, a technique that stands out increasingly is biotemplating. This technique involves the construction of a physical biomodel from two-dimensional images (tomography, resonance, ultrasound) which are handled and by software processed in a virtual biomodel which eventually becomes a physical biomodel printed by the 3D printer, allowing the medical team, the perception of details hardly observed through two-dimensional images. However the material used in the imported biotemplating is relatively expensive. In this work the aim was through regarded as optimum formulation published in the article (Meira, 2013) vary the percentages of composition (and adding a new constituent, magnesium sulfate), the binder used, the mixing method and granulometry of powders, and thus acquire a more inexpensive material and understand which influences the composition and granulometry properties essential to the quality of a powder additive manufacturing, such as flowability for homogeneous distribution, higher packing of the particles to maximize the density of manufactured, thickness of the layer higher than the dimensions of the agglomerates and good surface finish after the layer is deposited. Later, produced specimens with different compositions and particle sizes, and subjected them to compression tests and bending three points. After these tests, averages and standard deviations were calculated for each composition and grain size. Finally, the best results were compared to the imported material currently used. The new material, with a cost around ten times lower, meets the mechanical requirements that a biomodel requires, for example, minimum handling strength.
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Silva, Christiane Ribeiro da. "Determinação de granulometria de rom e britagem por análise de imagens." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/114441.
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Curvas granulométricas de alimentação e produto em etapas de britagem permitem modelar e avaliar o desempenho dos equipamentos. Essa pesquisa foi baseada na determinação de curvas granulométricas tendo como ponto de partida estudos sobre conceitos de amostragem de Gy, Napier-Munn, Minnitt e Pittard, sendo que as amostragens para definição dessas curvas granulométricas utilizaram análises de imagens. A importância deste estudo está relacionada à necessidade de conhecer o minério que abastece a usina, pois nesse caso de estudo, com o aprofundamento da cava, este vem se tornando mais compacto e resistente. Um dos objetivos essenciais é utilizar a amostragem via análise de imagens como ferramenta para determinação da granulometria de ROM alimentado na britagem primária de uma planta e aplicar a técnica nas demais fases. Foram definidas duas metodologias, uma para amostragem do ROM encaminhado à britagem primária e outra para alimentação da britagem terciária. Inicialmente, na amostragem de ROM (itabiritos friáveis), foi identificada a bancada de trabalho para que uma carga desmontada (259t) fosse basculada. Houve segregação dos blocos maiores que 2,5cm para análise e mensuração por imagens e formação da pilha para quarteamento e peneiramento. Os dados foram tratados e analisados, gerando as curvas granulométricas. A metodologia para amostrar a granulometria da alimentação da britagem terciária (itabiritos friáveis e granulados) partiu da identificação do ponto de amostragem, seguida de filmagens e determinação das imagens a serem utilizadas, simulando um amostrador automático. Os dados foram analisados e tratados com auxílio estatístico para obtenção das curvas. As metodologias foram consideradas de grande valia pois forneceram dados de granulometria com reprodutibilidade, porém mostraram-se laboriosas. Com relação ao ROM, o protocolo amostral apresenta taxas de redução de massa elevadas. As curvas abrangem ampla faixa de tamanhos, indicando que, apesar das etapas de homogeneização e divisão, os erros de viés e precisão (relativa = ±1%) resultantes frente à massa do lote retrocalculado (259t) foram desprezíveis. Nas curvas de ROM, 65% do material está retido em APA, 4% está na faixa entre APA e APF e 5% está retido em 1m, mostrando que frente amostrada atende às especificações do equipamento. Com relação à britagem terciária, foram realizados dois testes. Cada imagem gerou uma curva e cada teste gerou quatro curvas que geraram uma curva média. A curva média foi comparada com a de projeto, sendo a curva de granulado a mais próxima. As maiores variações ocorreram nos maiores tamanhos, acima de 80mm para granulado e de 50mm para friável. Também, foi observada a mesma quantidade de material entre APA e APF, porém 100% do material granulado alimentado nesta etapa estava retido em APF, indicando impactos nesta operação. As análises das curvas permite a identificação de um cenário sobre mudanças na granulometria do ROM para os próximos anos. As metodologias foram desenvolvidas para proceder no futuro com a análise de materiais mais resistentes e se tornam de grande valia, pois a tendência do material é se tornar cada vez mais compacto. Desta forma, os resultados defendem este tipo de amostragem como uma técnica viável e sugerem sua utilização para controle de produtividade em outros depósitos.Feed size distribution curves in crushing stages allows modeling and predict performance of crushers. This research was based on particle size’s distribution curves determination with start on studies about sampling theory from Gy, Napier-Munn, Minnitt e Pittard, however, the sampling was developed with image analysis techniques and not by conventional granulometry analysis (screening). The importance of this research is related to the necessity of knowing ore that feeds plant because, in this study, with increased pit ore is becoming stronger and resistant. One of the essential objective is to use sampling with image analysis techniques as a tool for determining ROM’s particle size that feeds the first stage of crushing plant and apply that techniques in other stages. It was defined two methodologies, one was developed to sample in situ the ROM granulometry that feeds the first crushing stage and the other one was developed specially to knows the particle size (granulometry) that feeds the third crushing stage. Initially, on sampling ROM (friable itabirite), it was identified the workbench to dump a mass of 259t. Big blocks were segregated. In order to measure big blocks were applied image analysis techniques. Smaller material than 2.5cm was screened. Data were processed and analyzed, generating the size distribution curves. The methodology to sampling the third crushing stage (friable itabirite and compact itabirite) began with the sampling point identification followed by recordings and images determination simulating an automatic sampler. Data were processed and analyzed with statistical help to obtain curves. Both methodologies were considered valuable as they provided size distribution curves with reproducibility but were laborious. ROM granulometry that was evaluated has shown insignificant bias and reproducibility errors. The sampling protocol shows high reduction of mass rates. ROM curves shows that 65% of material is retained on APA, 4% is retained in size range between APA and APF and 5% is retained in 1m, showing that front sampled are attending the equipments specifications. With respect to tertiary crushing, two tests were performed. Each image generated one curve and each test generated four curves that generated a medium curve. The medium curve was compared with project curve and the compact curve was the curve that stays closer. The largest errors are, as expects, to blocks of larger size, more than 80mm for compact and 50mm for friable. Also was observed the same material quantity on APA and APF but 100% of compact itabirite was retained in APF, indicating impacts in this operation. The curves analysis allows the identification about changes in ROM’s particle size for the coming years. The methodologies have been developed to proceed in the future with the analysis of more resistant materials and become of great value, because the tendency of the material is becoming increasingly compact. Thus, the results defends this kind of sampling as a viable technique and suggest their use for control of productivity of other mineral deposits.
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Geisenhanslüke, Carsten [Verfasser]. "Einfluss der Granulometrie von Feinstoffen auf die Rheologie von Feinstoffleimen = Influence of the granulometry of fine particles on the rheology of pastes / Carsten Geisenhanslüke." Kassel : Kassel University Press, 2009. http://d-nb.info/1007184450/34.
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Caetano, André Luiz Araújo. "Influência da variação granulométrica de argilas bentoníticas no comportamento reológico e de filtração de fluidos de perfuração base água." Universidade Federal da Paraíba, 2014. http://tede.biblioteca.ufpb.br:8080/handle/tede/450.
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Previous issue date: 2014-02-28Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
The physical characteristics as particle size distribution, density, shape, specific surface area and surface roughness affects the rheological behavior of dispersions. The objective of this work is to study the influence of particle size variation of bentonite clay used as viscosifying agents in water based drilling fluids, the rheological and filtration properties. For both six bentonite clays from deposits in Boa Vista, PB, which were prepared for physical and mineralogical characterization were selected. Then, they were crushed and sieved into different sieve ABNT N° 80, 200 and 325 (180, 75 and 45 μm), being determined from the particle size distribution by laser diffraction their dispersions and then treatment performed with a solution of sodium carbonate (Na2CO3 ) determining the rheological and filtration properties of their aqueous dispersions. We also evaluated the influence of two different curing conditions on the transformations performed on the polycationic bentonite with sodium in their rheological properties. Clays had physical and mineralogical characteristics typical of bentonite clays. The variation of the openings of the sieves influenced, in general, only the accumulated mass below 2 μm who showed greater for sieve clays in the opening 45 μm and all size analysis showed monomodal distribution. It was observed that, in general, the decrease in average particle diameter and increase in cumulative weight below 2 μm, VA is decreased. It was not possible to generalize the influence given by the size of the particles in the VP and VF. The curing time longer possible to clays which had accumulated mass lower than 2 μm (clay) higher to obtain dispersions with thixotropic characteristics and higher and lower values of VA and VP. It was not possible to generalize the influence of curing time in VF. The fine particles of bentonite have great tendency to form agglomerates hindering the analysis of the actual particle size and its relation to the rheological properties.
As características físicas das partículas como distribuição granulométrica, densidade, formato, área superficial específica e rugosidade superficial afetam o comportamento reológico de dispersões. O objetivo deste trabalho é estudar a influência da variação granulométrica de argilas bentoníticas utilizadas como agentes viscosificantes em fluidos de perfuração base água, nas propriedades reológicas e de filtração. Para tanto, foram selecionadas seis argilas bentoníticas provenientes de jazidas do município de Boa Vista, PB, que foram preparadas para caracterização física e mineralógica. Em seguida foram moídas e peneiradas em diferentes peneiras ABNT n° 80, 200 e 325 (180, 75 e 45 μm), sendo determinadas as distribuições granulométricas de suas dispersões por difração laser e posteriormente realizado o tratamento com solução de carbonato de sódio (Na2CO3) determinando-se as propriedades reológicas e de filtração de suas dispersões aquosas. Também foi verificada a influência de duas diferentes condições de cura realizadas nas transformações das bentonitas policatiônicas em sódicas em suas propriedades reológicas. As argilas apresentaram características físicas e mineralógicas típicas de argilas bentoníticas. A variação das aberturas das peneiras influenciou, em geral, apenas na massa acumulada abaixo de 2 μm que se apresentou maior para as argilas peneiradas na abertura de 45 μm e todas as análises granulométricas apresentaram distribuição monomodal. Observou-se que, em geral, com a diminuição no diâmetro médio das partículas e aumento na massa acumulada abaixo de 2 μm, ocorre diminuição na VA. Não foi possível generalizar a influência apresentada pelo tamanho de partículas na VP e no VF. O tempo de cura maior possibilita, para as argilas que apresentaram massas acumuladas abaixo de 2 μm (fração argila) mais elevadas, a obtenção de dispersões com características tixotrópicas e com maiores VA e menores valores de VP. Não foi possível generalizar a influência do tempo de cura no VF. As partículas finas de bentonitas apresentam grande tendência em formar aglomerados dificultando a análise do real tamanho de partículas e sua relação com as propriedades reológicas.
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SANTOS, Renato Correia dos. "Desenvolvimento de microestrutura de massas da cerâmica vermelha submetidas a diferentes tratamentos térmicos." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1064.
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O processo de fabricação de uma peça cerâmica é composto por uma sequência de etapas, sendo quatro as etapas principais: preparação da massa, conformação, secagem e queima. É importante destacar que as propriedades dos produtos cerâmicos estão relacionadas com as características iniciais da matéria- prima, tais como: granulometria, composição química, composição mineralógica e com os parâmetros de processamento. Dentro deste contexto, este trabalho teve como objetivo avaliar a influência das características das massas e das variáveis de processamento sobre a microestrutura e as propriedades tecnológicas de produtos obtidos a partir de massas da cerâmica vermelha. Foram utilizadas argilas e uma massa fornecidas por indústrias de cerâmica vermelha dos Estados de Pernambuco e da Paraíba. As argilas e a massa foram beneficiadas e em seguida, assim como as massas formuladas, caracterizadas através das técnicas de análise granulométrica e avaliação das características de plasticidade, bem como através de análises química, mineralógica e térmica. Os corpos de prova foram conformados por prensagem e extrusão e, posteriormente, submetidos a queima nas temperaturas de 800, 900, 1000, 1100 e 1200ºC, taxa de aquecimento de 5ºC/min e tempo de permanência na temperatura máxima de 60 e 180 min. Após tratamento térmico, foi realizada uma avaliação da variação da cor de queima em função das temperaturas supracitadas, bem como analisadas as propriedades tecnológicas (perda de massa ao fogo, retração linear de queima, absorção de água, porosidade aparente, massa específica aparente e resistência mecânica à flexão em três pontos), as fases formadas para os diferentes tratamentos térmicos e as morfologias das superfícies de fratura dos corpos de prova. Os resultados mostraram que a interação entre as características granulométricas, mineralógicas e químicas das amostras, a depender do tipo de processo de conformação utilizado e do ciclo de queima estabelecido, acarretam alterações relevantes sobre a microestrutura, impactando sobre as propriedades mecânicas do produto final.
The process for manufacturing a ceramic part consists of a sequence of steps, four major steps: preparation of the dough, shaping, drying and firing. It is important to note that the properties of ceramics are related to the initial characteristics of the raw material, such as particle size, chemical composition, mineralogical composition and processing parameters. Within this context, this study aimed to evaluate the influence of the characteristics of the masses and processing variables on the microstructure and technological properties of products obtained from the mass of red ceramic. clays were used and a mass provided by red ceramic industries of Pernambuco and Paraíba States. Clays and mass spectra were processed and then issued as well as the masses, characterized by the granulometric analysis techniques and evaluation of the characteristics of plasticity, as well as through chemical, mineralogical and thermal analysis. The specimens were shaped by pressing and extrusion and subsequently subjected to burning at temperatures of 800, 900, 1000, 1100 and 1200°C, heating rate of 5°C/min and residence time in the maximum temperature of 60 and 180 min. After heat treatment, an evaluation of the variation in the burning color according to the above temperatures was performed and analyzed technological properties (mass loss on ignition linear firing shrinkage, water absorption, porosity, apparent specific gravity and strength mechanical bending in three points), the phases formed for different heat treatments and the morphologies of the fracture surfaces of the specimens. The results showed that the interaction between the granulometric characteristics, mineralogical and chemical samples, depending on the type of forming process used and the set firing cycle, result in significant changes on the microstructure, an impact on the mechanical properties of the final product.
Books on the topic "Granulometry"
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Tanner, William Francis. William F. Tanner on environmental clastic granulometry. Edited by Balsillie James H and Florida Geological Survey. Tallahassee, Fla: Florida Geological Survey, 1995.
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M, Syvitski James P., ed. Principles, methods, and application of particle size analysis. Cambridge: Cambridge University Press, 1991.
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Boutier, Alain. Laser Metrology in Fluid Mechanics: Granulometry, Temperature and Concentration Measurements. Wiley & Sons, Incorporated, John, 2013.
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Boutier, Alain. Laser Metrology in Fluid Mechanics: Granulometry, Temperature and Concentration Measurements. Wiley & Sons, Incorporated, John, 2013.
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Boutier, Alain. Laser Metrology in Fluid Mechanics: Granulometry, Temperature and Concentration Measurements. Wiley & Sons, Incorporated, John, 2013.
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Boutier, Alain. Laser Metrology in Fluid Mechanics: Granulometry, Temperature and Concentration Measurements. Wiley & Sons, Incorporated, John, 2012.
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Boutier, Alain. Laser Metrology in Fluid Mechanics: Granulometry, Temperature and Concentration Measurements. Wiley & Sons, Incorporated, John, 2013.
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Wahrhaftig, Alexandre de Macêdo. La portada del corregidor. Brazil Publishing, 2020. http://dx.doi.org/10.31012/978-65-5861-060-1.
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This is a preliminary examination related to a portal faced of a public building in the city of La Laguna, Tenerife, Spain, carved in the mid-sixteenth century, of rich lines and architectural symbols characteristic of the Renaissance early stage. It was set up in ashlars, of chemical composition and granulometry that gave to it the classification of toba basaltic volcanic, compact granular, reddish in colour. Its high chemical resistance was not able to withstand the 450 years of exposure and at the time of diagnosis its surface had a high degree of dirt adhered and a profound loss of material by disaggregation and breakdowns, what had partially destroyed valuable elements of its characterization. This preliminary investigation fell exclusively on the stone material that composed the faced, although could be observed other elements like roof tile in the ceiling, and carpentry on the window and door. For that reason, the focus of this work has been directed to the stylistic symbolism and diagnose of the main element, being restricted to the stonework, where was the essence of the centennial facade. Therefore, this previous analysis was performed objecting to prepare the base for a restoration work considering the archaeological line of thought, in order to retrieve and maintain its forms and volumes, working on fundamental architectural elements to rescue and ensure to future generations the true message that was exteriorized.
Book chapters on the topic "Granulometry"
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Kumar, Amit. "Granulometry." In Encyclopedia of Earth Sciences Series, 477. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-90-481-2642-2_222.
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Vincent, Luc. "Fast Grayscale Granulometry Algorithms." In Computational Imaging and Vision, 265–72. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1040-2_34.
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Das, Gautam Kumar. "Granulometry of Mangrove Sediments." In Estuarine Morphodynamics of the Sunderbans, 103–17. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11343-2_6.
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Couprie, Michel, and Hugues Talbot. "Distance, Granulometry and Skeleton." In Mathematical Morphology, 263–89. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118600788.ch10.
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Das, Gautam Kumar. "Granulometry of Beach Sands." In Coastal Environments of India, 79–94. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18846-6_5.
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Chowdhury, Manish, Benjamin Klintström, Eva Klintström, Örjan Smedby, and Rodrigo Moreno. "Granulometry-Based Trabecular Bone Segmentation." In Image Analysis, 100–108. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59129-2_9.
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Iskander, Magued, and Linzhu Li. "Methods for Determining Particle Granulometry." In Dynamic Image Analysis of Granular Materials, 9–23. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-47534-4_2.
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Lara, Arnaldo Câmara, and Roberto Hirata. "A Granulometry Based Descriptor for Object Categorization." In Lecture Notes in Computer Science, 413–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38294-9_35.
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Diaconeasa, Dănuţ I. "Granulometry of Sediments in the Mamaia Bay Area." In Coastal Research Library, 133–40. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57577-3_8.
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Normand, Nicolas. "Single Scan Granulometry Estimation from an Asymmetric Distance Map." In Discrete Geometry for Computer Imagery, 288–99. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14085-4_23.
Full textConference papers on the topic "Granulometry"
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Kuzas, Pranas, Darius Gailius, Vygantas Augutis, and Antanas Dumcius. "Sampling problems in granulometry." In 2012 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2012. http://dx.doi.org/10.1109/i2mtc.2012.6229270.
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Ferrari, Stefano, Vincenzo Piuri, and Fabio Scotti. "Virtual environment for granulometry analysis." In 2008 IEEE Conference on Virtual Environments, Human-Computer Interfaces and Measurement Systems (VECIMS). IEEE, 2008. http://dx.doi.org/10.1109/vecims.2008.4592772.
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Coenen, Max, Dries Beyer, and Michael Haist. "Granulometry transformer: image-based granulometry of concrete aggregate for an automated concrete production control." In 2023 European Conference on Computing in Construction and the 40th International CIB W78 Conference. European Council for Computing in Construction, 2023. http://dx.doi.org/10.35490/ec3.2023.223.
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Montenegro, Anibal, Yuri Nahmad Molinari, Damiano Sarocchi, Roberto Bartali, and Luis Ángel Rodríguez. "Optical granulometry by digital image processing." In International Commission for Optics (ICO 22), edited by Ramón Rodríguez-Vera and Rufino Díaz-Uribe. SPIE, 2011. http://dx.doi.org/10.1117/12.902633.
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Santos, Amanda, Gretta Larisa Aurora Arce Ferrufino, and Ivonete Ávila. "INFLUENCE OF GRANULOMETRY IN THE LEACHING PROCESS." In 18th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2020. http://dx.doi.org/10.26678/abcm.encit2020.cit20-0625.
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Kirichenko, K. Y., A. V. Gridasov, V. A. Drozd, and K. S. Golokhvast. "Studying of welding aerosol using laser granulometry." In Asia-Pacific Conference on Fundamental Problems of Opto- and Microelectronics, edited by Yuri N. Kulchin, Roman V. Romashko, and Alexander V. Syuy. SPIE, 2016. http://dx.doi.org/10.1117/12.2268234.
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Changzheng Liu and Guiyun Ye. "Measurement of microbubbles size by Granulometry approach." In 2008 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2008. http://dx.doi.org/10.1109/aim.2008.4601785.
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Ravaszová, Simona, and Karel Dvořák. "The influence of milling technology on the crystallite size and granulometry of tricalcium aluminate." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.127.
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The article deals with the monitoring and evaluating of the length of the milling process on the crystallographic and granulometric properties of the cubic tricalcium aluminate. Tricalcium aluminate was prepared by solidstate reaction and subjected to milling in a dry and wet conditions of three laboratory mills. The evaluation of the influence of the milling technology on the crystallite size was carried out on the selected main three crystallographic planes. The calculation of the crystallite size was based on the full width of half maximum. Full width of half maximum has been calculated for all the above diffraction lines in the HighScore Plus program. All types of selected laboratory mills in both dry and wet conditions for all three crystallographic planes affect crystallite size of tricalcium aluminate. In terms of granulometry, the material was very effective and significantly refined. The problem arises with long grinding time, where the material tended to form agglomerates.
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Ferrari, Stefano, Vincenzo Piuri, and Fabio Scotti. "Image Processing for Granulometry Analysis via Neural Networks." In 2008 IEEE International Conference on Computational Intelligence for Measurement Systems and Applications (CIMSA). IEEE, 2008. http://dx.doi.org/10.1109/cimsa.2008.4595827.
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Dimofte, C., L. Mihut, and I. Baltog. "Gauss window for singular system analysis in granulometry." In ROMOPTP '94: 4th Conference on Optics, edited by Valentin I. Vlad. SPIE, 1995. http://dx.doi.org/10.1117/12.203471.
Full textReports on the topic "Granulometry"
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Avolio, Gennaro. Granulometric analysis of recent sediments of Tillamook Bay, Oregon. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.1927.
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Alokhina, Tetiana, and Vadym Gudzenko. Distribution of radionuclides in modern sediments of the rivers flowing into the Dnieper-Bug Estuary. EDP Sciences, 2021. http://dx.doi.org/10.31812/123456789/4617.
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The article presents the results of large-scale studies of the content and distribution of natural and man-made radionuclides in the sediments of the rivers flowing into the Dnieper-Bug estuary. The article also presents the results of the granulometric analysis of the surveyed water bodies. The data about natural radioactive elements in the sediments rivers flowing into the Dnieper-Bug estuary obtained in this research are demonstrated moderate specific activity, which, however, clearly correlates with the granulometric composition of sediments. The 137Cs determined by us is contained in the sediments of all studied water bodies and the places of it greatest concentration coincide with the areas in which the sediment is represented mainly by the pelitic fraction. The data obtained in this research can serve as a baseline data in natural radionuclides concentration in sediments rivers flowing into the Dnieper-Bug estuary. The obtained data can also be used for further monitoring of the specific activity of man-made radionuclides, in particular 137Cs.
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Asprey, K. W., and J. P. M. Syvitski. Computer Programs and Code Used in the Operation of the Automated Granulometric Instruments Within the Atlantic Geoscience Centre Soft Sediment Laboratory. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/128181.
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Moment Versus Graphic Measures in Granulometry. Florida Geological Survey, 2002. http://dx.doi.org/10.35256/ofr84.
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William F. Tanner on Environmental Clastic Granulometry. Florida Geological Survey, 1995. http://dx.doi.org/10.35256/sp40.
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