Granulometry
Mostrando 1-12 de 121 artigos, teses e dissertações.
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1. Characteristics and utilization prospects of red ceramic waste in lightweight aggregates: a systematic review
Abstract Red ceramic waste (RCW) is one of the main by-products generated by the production of ceramic materials. Its application in lightweight aggregates (LWAs) has not yet been tested. Thus, this review intends to evaluate the perspectives of using RCW in the manufacture of LWAs. The search was carried out in the ScienceDirect database. 47 articles were s
Cerâmica. Publicado em: 2022
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2. Study of soils used with subgrade and sub-ballast in Brazilian railways
Abstract Brazil has an extremely limited railroad network compared to other developed and developing countries. There are projects to expand this mesh. Knowing that the cost of implementing a railroad is high, research for solutions that allow cost reduction is of great importance. But the parameters of the materials used in the subgrade and sub-ballast laye
REM - International Engineering Journal. Publicado em: 2022
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3. Assessment of Urban Contamination by Sewage in Sediments from Ipojuca River in Caruaru City, Pernambuco, Brazil
The Ipojuca River is considered the third most polluted river in Brazil due to the intense anthropogenic activities in the surrounding urban areas. The most important effluent is sewage discharge, which is responsible for considerable contamination. Traditional analyses (infrared spectroscopy, organic matter (OM), elemental analysis and granulometry) and adv
Journal of the Brazilian Chemical Society. Publicado em: 2022
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4. Use of dynamic ballast testing equipment for analysis of rail aggregate breakdown
Abstract The granulometric range used has a direct influence on the life of the ballast layer when subjected to the load generated by rail traffic. However, in Brazil, we have only two size ranges to be used. The publications related to the subject matter under study express the need for a continuous grain size strip, different from the ones usually used in
REM, Int. Eng. J.. Publicado em: 2021-06
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5. Not even Freud explains this!
Abstract The final disposal of tailings in the form of paste is a technological alternative. The objective of the present study is to obtain knowledge and compare different operational conditions that are favorable to the production of paste with the fine tailings generated after final desliming stage, obtained from the processing of metallic and non-metalli
REM, Int. Eng. J.. Publicado em: 2021-01
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6. Production of paste from fine tailings streams in a laboratory scale column thickener
Abstract The final disposal of tailings in the form of paste is a technological alternative. The objective of the present study is to obtain knowledge and compare different operational conditions that are favorable to the production of paste with the fine tailings generated after final desliming stage, obtained from the processing of metallic and non-metalli
REM, Int. Eng. J.. Publicado em: 2021-01
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7. Brazil Nut Oil Extraction Using Subcritical n-Propane: Advantages and Chemical Composition
In order to provide an effective and environmentally correct alternative for oil extraction, subcritical n-propane was used under different temperature and pressure conditions to obtain Brazil nut oil. The composition of the oil was determined and compared to the oils obtained by conventional methods. The result of the extraction yield obtained using subcrit
J. Braz. Chem. Soc.. Publicado em: 2020-03
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8. Characterization of the solid residue generated in the detoxification step of sugarcane bagasse hemicellulosic hydrolysate and behavior in agricultural soils
ABSTRACT Overliming is an effective way of neutralizing and reducing the toxicity of the hydrolysates generated from acidic pretreatment of lignocellulosic biomass for ethanol production and others biotechnological products. Overliming generates a solid residue whose inadequate disposal may represent an environmental problem. This work aimed at the chemical
Bragantia. Publicado em: 2020-03
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9. MAXIMIZATION OF ESSENTIAL OIL ANTIOXIDANT CAPACITY VIA STAR ANISE HYDRODISTILLATION
Abstract Chinese star anise essential oil (EO) is prized for its pleasant aroma and mainly due to its antioxidant capacity (AC), which can combat cancer and treat neurodegenerative diseases. This study shows the innovative approach of optimizing not only EO yield, but also to therapeutic activity. The product obtained follows the principle of the Pure Food a
Braz. J. Chem. Eng.. Publicado em: 13/01/2020
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10. DESENVOLVIMENTO DE METODOLOGIA DE REVELAÇÃO DE IMPRESSÃO DIGITAL LATENTE COM CHALCONAS
Fingerprints are unique for each individual contributing to human identification in forensic cases. Visualization of latent fingerprints usually involves the use of a chemical substance that creates a contrast between fingerprint residues and the surface on which the print was deposited. Commercial powders used as fingerprint developers by papilloscopy have
Quím. Nova. Publicado em: 21/10/2019
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11. Caracterização mecânica do gesso para revestimento produzido no Polo Gesseiro do Araripe
Resumo O gesso é um material de grande uso na construção civil, destacando-se seu emprego como pasta de gesso para revestimento. No Brasil, o Polo Gesseiro do Araripe é o maior produtor. Percebe-se a necessidade de conhecimento das propriedades e características desse material, principalmente, com foco no produto acabado como revestimento interno em par
Ambient. constr.. Publicado em: 03/10/2019
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12. OPTIMIZATION OF HIGH-CONCENTRATION TRANS-ANETHOLE PRODUCTION THROUGH HYDRODISTILLATION OF STAR ANISE
Abstract Illicium verum Hook essential oil (EO) is composed mainly of trans-anethole (TA), which has therapeutic potential. The extraction is usually by hydrodistillation, taking long hours, leaving the process costly and product with lower quality. Thus, the present study sought to optimize dehydrated fruit fragmentation by Box-Wilson central composite desi
Braz. J. Chem. Eng.. Publicado em: 30/09/2019