Výsledky vyhledávání - "CARLOS HOFFMANN SAMPAIO"

Akademický článek

Analysis of Physical Properties of Coarse Aggregates Recovered from Demolished Concrete with a Two-Stage Water Jigs Process for Reuse as Aggregates in Concrete

Autor: Artur Bressanelli Teixeira, Carlos Hoffmann Sampaio, Josep Oliva Moncunill, Jose Luis Cortina Palas, Monica Mariana Davila Lima, Grethel Tamara Herrera La Rosa

Publikováno v: Buildings, Vol 14, Iss 7, p 2226 (2024)

The present work analyses the physical characteristics of aggregates recovered with the waterjigging process from comminuted concrete. In this work, conventional concrete (C16/20) was crushed to a top size of 20 mm with a jaw crusher and classified i

Externí odkaz: https://doaj.org/article/4bd444da6a6042feaaee3d192539ecef

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Akademický článek

PREDICTION OF WATER-BASED PAINT PROPERTIES BASED ON THEIR MINERAL FILLERS: SIMPLEX-PLSR COUPLING APPLICATION

Autor: Paulo Ricardo Nunes da Conceição, Carlos Otávio Petter, Carlos Hoffmann Sampaio

Publikováno v: Holos, Vol 2, Iss 0, Pp 2-15 (2018)

The present study shows the optimization of mineral filler blends for use in water-based paints. The aim of the modelling is to evaluate the possibility of creating a model of prediction of the contrast ratio and brightness of the dry film, where the

Externí odkaz: https://doaj.org/article/647b0e2d9b7841c08e4908bbe31cb28f

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Akademický článek

MINERAIS CONTAMINANTES DO CAULIM DA MINA IPIXUNA, NO ESTADO DO PARÁ: CARACTERÍSTICAS E INTERFERÊNCIAS NO BENEFICIAMENTO MINERAL

Autor: Sydney Sabedot, RUBENS MÜLLER KAUTZMANN, CARLOS OTÁVIO PETTER, CARLOS HOFFMANN SAMPAIO

Publikováno v: Holos, Vol 3, Iss 0, Pp 349-357 (2014)

A mina Ipixuna extrai caulim sedimentar e produz matéria-prima final para a indústria do papel. O minério varia devido a presença de minerais contaminantes. Whiteness, yellowness e composição química são parâmetros importantes no processamen

Externí odkaz: https://doaj.org/article/68427809fa4140069d51d37cb293421f

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Akademický článek

Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks

Autor: Patrícia Favaretto, Gelsa Edith Navarro Hidalgo, Carlos Hoffmann Sampaio, Rodrigo de Almeida Silva, Richard Thomas Lermen

Publikováno v: Applied Sciences, Vol 7, Iss 10, p 1090 (2017)

The main objective of this study was to evaluate the use of construction and demolition waste (CDW) from the Passo Fundo region of Rio Grande do Sul (RS), Brazil, in the development of aerated foamed concrete. This waste had not yet been characterize

Externí odkaz: https://doaj.org/article/a0a41d0a2aa0481ab5cc53e3a2730de2

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Akademický článek

Caracterização de cinzas sulfatadas de carvão visando utilização na indústria de cimento - reconstrução mineralógica do carvão de Candiota (Brasil)

Autor: Eduardo Rodrigo Ramos de Santana, Carlos Hoffmann Sampaio, Elba Calesso Teixeira, Pierre-Antoine Andréani, Jean-Charles Benezet, Pierre Adamiec, Ali Benhassaine, Rosvita Schütz

Publikováno v: Brazilian Journal of Geology, Vol 41, Iss 2, Pp 220-227

Resumo: O Brasil passou por um período de crise energética em 2000. Contudo, este país apresenta vastas reservas de carvão que poderiam ser mais exploradas. Depois da crise o consumo de carvão teve algum incremento, mais estudos deveriam ser fei

Externí odkaz: https://doaj.org/article/0c6c70d41ffa4df4a617bfeb964bd40a

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Influence of igneous intrusions on coal flotation feasibility: the case of Moatize Mine, Mozambique

Autor: Josep Oliva, Irineu Brum, Weslei Ambrós, Pedro Maraschim Zancan, Carlos Hoffmann Sampaio

Publikováno v: Minerals
Volume 13
Issue 2
Pages: 161

In this study, the influence on the properties of coal caused by proximity with an igneous intrusion in the Moatize mine was evaluated, together with the possibility of beneficiating such coal in the flotation circuit of the plant. For this purpose,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33d60e1db67bb64f6817ee25ab748806
https://hdl.handle.net/2117/384927

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CARACTERIZAÇÃO GEOQUÍMICA DE BASALTO AMIGDALÓIDE ALTERADO PARA USO AGRONÔMICO

Autor: Adilson Celimar Dalmora, Rubens Müller Kautzmann, José Cortina, Carlos Hoffmann Sampaio, Diego dos Santos de Medeiros, Marcondes Lima da Costa, Agência Nacional de Mineração

Publikováno v: BOLETIM DO MUSEU DE GEOCIÊNCIAS DA AMAZÔNIA. 7:1-10

Silicate rocks, especially those of volcanic origin, have been studied and applied for rock stonemeal in agricultural soils. Recently, in 2013, the use of rock materials was approved by the Brazil’s fertilizer legislation, receiving the name of rem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::07638ffca76f6d88af005204b35d9cfa
https://doi.org/10.31419/issn.2594-942x.v72020i2a5rmk

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Production of high-quality coarse recycled aggregates through a two-stage jigging process

Autor: Viviane L. S. Gschwenter, Rejane M. C. Tubino, Weslei M. Ambrós, Gerson L. Miltzarek, Carlos Hoffmann Sampaio, Josep Oliva Moncunill, Bogdan Grigore Cazacliu, Denise C. C. Dal Molin

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Minerals; Volume 12; Issue 5; Pages: 532

The use of recycled aggregates (RA) to replace natural aggregates (NA) in new concrete production has been pointed out as one of the main strategies to close the loop of construction materials. However, producing RA with properties similar to those o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f05327c36efc6c2eb9b67396b692f43

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Editorial for Special Issue 'Gravity Concentration'

Autor: Carlos Hoffmann Sampaio, Weslei Monteiro Ambrós

Publikováno v: Minerals, Vol 11, Iss 1355, p 1355 (2021)
UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)

Gravity concentration is the process by which particles of different densities, sizes, and shapes separate from each other when under the action of gravity or centrifugal forces [...]

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::92904c6ba53d28616cf55c5925278cb0
https://www.mdpi.com/2075-163X/11/12/1355

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Development of a physical separation route for the concentration of base metals from old wasted printed circuit boards

Autor: Pedro Jorge Walburga Keglevich de Buzin, Rejane Maria Candiota Tubino, Weslei Monteiro Ambrós, Josep Oliva Moncunill, Carlos Hoffmann Sampaio, Irineu Antônio Schadach de Brum

Publikováno v: UPCommons. Portal del coneixement obert de la UPC
Universitat Politècnica de Catalunya (UPC)
Minerals, Vol 11, Iss 1014, p 1014 (2021)
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Minerals
Volume 11
Issue 9

Wastes from old electronic devices represent a significant part of the electronic scrap generated in developing countries, being commonly sold by collectors as low-value material to recycling hubs abroad. Upgrading the quality of this waste type coul

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82b3407cf7574f60e0eedbccf11cb09c
https://hdl.handle.net/2117/352576

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