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Antenor Zanardo - One of the best experts on this subject based on the ideXlab platform.

  • Caracterização química e mineralógica da incrustação em rede de ferro fundido e potencial de recuperação da capacidade hidráulica Chemical and mineralogical incrustation characterization and potential of hydraulic performance recovery
    Brazilian Association of Sanitary and Environmental Engineering, 2012
    Co-Authors: Rodrigo Braga Moruzzi, Fabiano Tomazini Da ,conceicao, Guillermo Rafael Beltran Navarro, Antenor Zanardo
    Abstract:

    O objetivo deste trabalho foi caracterizar química e mineralogicamente os depósitos em rede de ferro fundido e avaliado o potencial de recuperação da capacidade hidráulica em tubulação altamente comprometida pela incrustação. Para tal, foram feitas medidas do coeficiente de resistência (pitometria em trecho isolado de 71 m), análises química ( P-ES e ICP-MS), mineralógicas (laminação, difração de raios-X e microscopia eletrônica), dureza (escala de Mohs) e simulações em setor hipotético com cenários distintos (de C1 a C4) de troca e substituição da rede. Os resultados indicaram que a rede altamente comprometida tem potencial limitado de recuperação (de 3,9 a 14,0 m0,367.s-1). As caracterizações química e mineralógica indicaram Magnetita e Goethita, com dureza da ordem de 6 na escala Mohs. As simulações demonstraram potências relativas (razões Ci/C1) da ordem de 86,00, 1,00 e 0,02% em relação ao cenário atual.The purpose of this work was to characterize chemical and mineralogical the water supply networks and to assess the hydraulic recovery on high-degraded pipe. Thus, the resistance (by pitometric essays), chemical analyses (ICP-MS and ICP-ES), mineralogical analysis (petrographic thin sections, X-ray difractometry and scanning electronic microscopy), hardness (Mohs Scale) and simulations for pipe's change and rehabilitations scenarios were investigated (from Scenario 1 to 4). The results showed that the high-degraded pipe had a limited recovery (from 3,9 to 14,0 m0,367.s-1). The deposits were formed by oxide and hydroxide of iron (magnetite and goethite), which are materials of high hardness (6 on Mohs Scale). The simulations indicated the required power ratio (Ci/C1) around 86.00, 1.00 and 0.02% in relation to present scenario

Fabiano Tomazini Da ,conceicao - One of the best experts on this subject based on the ideXlab platform.

  • Caracterização química e mineralógica da incrustação em rede de ferro fundido e potencial de recuperação da capacidade hidráulica
    Assoc Brasileira Engenharia Sanitaria Ambiental, 2012
    Co-Authors: Moruzzi, Rodrigo Braga, Fabiano Tomazini Da ,conceicao, Beltran Navarro, Guillermo Rafael, Zanardo Antenor
    Abstract:

    The purpose of this work was to characterize chemical and mineralogical the water supply networks and to assess the hydraulic recovery on high-degraded pipe. Thus, the resistance (by pitometric essays), chemical analyses (ICP-MS and ICP-ES), mineralogical analysis (petrographic thin sections, X-ray difractometry and scanning electronic microscopy), hardness (Mohs Scale) and simulations for pipe's change and rehabilitations scenarios were investigated (from Scenario 1 to 4). The results showed that the high-degraded pipe had a limited recovery (from 3,9 to 14,0 m(0,367).s(-1)). The deposits were formed by oxide and hydroxide of iron (magnetite and goethite), which are materials of high hardness (6 on Mohs Scale). The simulations indicated the required power ratio (C-i/C-1) around 86.00, 1.00 and 0.02% in relation to present scenario

  • Caracterização química e mineralógica da incrustação em rede de ferro fundido e potencial de recuperação da capacidade hidráulica Chemical and mineralogical incrustation characterization and potential of hydraulic performance recovery
    Brazilian Association of Sanitary and Environmental Engineering, 2012
    Co-Authors: Rodrigo Braga Moruzzi, Fabiano Tomazini Da ,conceicao, Guillermo Rafael Beltran Navarro, Antenor Zanardo
    Abstract:

    O objetivo deste trabalho foi caracterizar química e mineralogicamente os depósitos em rede de ferro fundido e avaliado o potencial de recuperação da capacidade hidráulica em tubulação altamente comprometida pela incrustação. Para tal, foram feitas medidas do coeficiente de resistência (pitometria em trecho isolado de 71 m), análises química ( P-ES e ICP-MS), mineralógicas (laminação, difração de raios-X e microscopia eletrônica), dureza (escala de Mohs) e simulações em setor hipotético com cenários distintos (de C1 a C4) de troca e substituição da rede. Os resultados indicaram que a rede altamente comprometida tem potencial limitado de recuperação (de 3,9 a 14,0 m0,367.s-1). As caracterizações química e mineralógica indicaram Magnetita e Goethita, com dureza da ordem de 6 na escala Mohs. As simulações demonstraram potências relativas (razões Ci/C1) da ordem de 86,00, 1,00 e 0,02% em relação ao cenário atual.The purpose of this work was to characterize chemical and mineralogical the water supply networks and to assess the hydraulic recovery on high-degraded pipe. Thus, the resistance (by pitometric essays), chemical analyses (ICP-MS and ICP-ES), mineralogical analysis (petrographic thin sections, X-ray difractometry and scanning electronic microscopy), hardness (Mohs Scale) and simulations for pipe's change and rehabilitations scenarios were investigated (from Scenario 1 to 4). The results showed that the high-degraded pipe had a limited recovery (from 3,9 to 14,0 m0,367.s-1). The deposits were formed by oxide and hydroxide of iron (magnetite and goethite), which are materials of high hardness (6 on Mohs Scale). The simulations indicated the required power ratio (Ci/C1) around 86.00, 1.00 and 0.02% in relation to present scenario

Rodrigo Braga Moruzzi - One of the best experts on this subject based on the ideXlab platform.

  • Caracterização química e mineralógica da incrustação em rede de ferro fundido e potencial de recuperação da capacidade hidráulica Chemical and mineralogical incrustation characterization and potential of hydraulic performance recovery
    Brazilian Association of Sanitary and Environmental Engineering, 2012
    Co-Authors: Rodrigo Braga Moruzzi, Fabiano Tomazini Da ,conceicao, Guillermo Rafael Beltran Navarro, Antenor Zanardo
    Abstract:

    O objetivo deste trabalho foi caracterizar química e mineralogicamente os depósitos em rede de ferro fundido e avaliado o potencial de recuperação da capacidade hidráulica em tubulação altamente comprometida pela incrustação. Para tal, foram feitas medidas do coeficiente de resistência (pitometria em trecho isolado de 71 m), análises química ( P-ES e ICP-MS), mineralógicas (laminação, difração de raios-X e microscopia eletrônica), dureza (escala de Mohs) e simulações em setor hipotético com cenários distintos (de C1 a C4) de troca e substituição da rede. Os resultados indicaram que a rede altamente comprometida tem potencial limitado de recuperação (de 3,9 a 14,0 m0,367.s-1). As caracterizações química e mineralógica indicaram Magnetita e Goethita, com dureza da ordem de 6 na escala Mohs. As simulações demonstraram potências relativas (razões Ci/C1) da ordem de 86,00, 1,00 e 0,02% em relação ao cenário atual.The purpose of this work was to characterize chemical and mineralogical the water supply networks and to assess the hydraulic recovery on high-degraded pipe. Thus, the resistance (by pitometric essays), chemical analyses (ICP-MS and ICP-ES), mineralogical analysis (petrographic thin sections, X-ray difractometry and scanning electronic microscopy), hardness (Mohs Scale) and simulations for pipe's change and rehabilitations scenarios were investigated (from Scenario 1 to 4). The results showed that the high-degraded pipe had a limited recovery (from 3,9 to 14,0 m0,367.s-1). The deposits were formed by oxide and hydroxide of iron (magnetite and goethite), which are materials of high hardness (6 on Mohs Scale). The simulations indicated the required power ratio (Ci/C1) around 86.00, 1.00 and 0.02% in relation to present scenario

Donna L Whitney - One of the best experts on this subject based on the ideXlab platform.

  • exploring the relationship of scratch resistance hardness and other physical properties of minerals using Mohs Scale minerals
    Journal of geoscience education, 2007
    Co-Authors: Donna L Whitney, Annia K Fayon, Margaret E Broz, Robert F Cook
    Abstract:

    The Mohs Scale is enshrined in geoscience curricula as a simple and effective tool for identifying minerals and understanding the influence of crystal structure and chemistry on physical properties; e.g., hardness. Measuring scratch resistance is different from measuring hardness, however, because scratching involves components of loading and shearing, whereas "absolute" hardness is measured by the response of a material to vertical loading (indentation). Although it is not practical for most undergraduate classes to do indentation hardness testing, students can evaluate tabulated quantitative hardness data and compare these data with their own determination of relative scratch resistance. To help students better understand physical properties of minerals, and in particular the concept of mineral hardness, we present an example exercise based on recent systematic measurements of the hardness of Mohs Scale minerals using indentation techniques. This exercise allows students to explore the differences in hardness among minerals of the Mohs Scale, enhancing their understanding of the Mohs Scale itself as well as the chemical and physical factors that influence mineral hardness. The exercise is most appropriate for Earth materials and mineralogy classes, but can be adapted for students with different levels of expertise, including introductory physical science students.

  • microhardness toughness and modulus of Mohs Scale minerals
    American Mineralogist, 2006
    Co-Authors: Margaret E Broz, Robert F Cook, Donna L Whitney
    Abstract:

    We report new results of microhardness and depth-sensing indentation (DSI) experiments for the first nine minerals in the Mohs Scale: talc, gypsum, calcite, fluorite, apatite, orthoclase, quartz, topaz, and corundum. The Mohs Scale is based on a relative measure of scratch resistance, but because scratching involves both loading and shearing, scratch resistance is not equivalent to hardness as measured by modern loading (indentation) methods; scratch resistance is also related to other material properties (fracture toughness, elastic modulus). To better understand the relationship of hardness to scratch resistance, we systematically determined hardness, fracture toughness, and elastic modulus for Mohs minerals. We measured hardness and toughness using microindentation, and modulus and hardness with DSI (“nanoindentation”) experiments. None of the measured properties increases consistently or linearly with Mohs number for the entire Scale.

Zanardo Antenor - One of the best experts on this subject based on the ideXlab platform.

  • Caracterização química e mineralógica da incrustação em rede de ferro fundido e potencial de recuperação da capacidade hidráulica
    Assoc Brasileira Engenharia Sanitaria Ambiental, 2012
    Co-Authors: Moruzzi, Rodrigo Braga, Fabiano Tomazini Da ,conceicao, Beltran Navarro, Guillermo Rafael, Zanardo Antenor
    Abstract:

    The purpose of this work was to characterize chemical and mineralogical the water supply networks and to assess the hydraulic recovery on high-degraded pipe. Thus, the resistance (by pitometric essays), chemical analyses (ICP-MS and ICP-ES), mineralogical analysis (petrographic thin sections, X-ray difractometry and scanning electronic microscopy), hardness (Mohs Scale) and simulations for pipe's change and rehabilitations scenarios were investigated (from Scenario 1 to 4). The results showed that the high-degraded pipe had a limited recovery (from 3,9 to 14,0 m(0,367).s(-1)). The deposits were formed by oxide and hydroxide of iron (magnetite and goethite), which are materials of high hardness (6 on Mohs Scale). The simulations indicated the required power ratio (C-i/C-1) around 86.00, 1.00 and 0.02% in relation to present scenario