Fineness
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Avaliação por análise de DRX da influência do beneficiamento de moagem na atividade pozolânica da cinza do bagaço de cana-de-açúcar
RESUMO É crescente o reaproveitamento e utilização de resíduos em matrizes de base cimentícia, no intuito de um destino adequado, por apresentarem propriedades pozolânicas, bem como, na perspectiva da redução do consumo de cimento Portland. Neste trabalho foram produzidas cinzas a partir do beneficiamento de moagem da cinza do bagaço de cana-de-aç�
Matéria (Rio J.). Publicado em: 25/11/2019
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2. Avaliação das propriedades físicas, químicas e mineralógicas da fração fina (<150 µm) do agregado reciclado de RCD
Resumo Fatores como o alto consumo de recursos naturais e os elevados volumes de resíduos produzidos pela indústria da construção civil alertam sobre a importância de reutilizar e reciclar os materiais. Assim, este trabalho objetivou determinar e avaliar as características físicas, químicas e mineralógicas dos finos do agregado reciclado (FAR), comp
Cerâmica. Publicado em: 2019-01
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3. Wind Tunnel Testing on a Generic Model of a Hybrid Lifting Hull
ABSTRACT In this research, an experimental investigation was carried out at the International Islamic University Malaysia - Low Speed Wind Tunnel facility on a generic model of a hybrid lifting hull. Based on the historical trends of non-rigid airships, the fineness ratio of the said hull has been selected equal to 4. Free stream velocity was kept at 20 m/s
J. Aerosp. Technol. Manag.. Publicado em: 2016-12
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4. Effect of wood particle treatment on the properties of gypsum plaster pastes and composites
ABSTRACT In this work the performance of gypsum plaster and wood particle in pastes and composites was investigated. Wood particles of fineness 0.42 mm and 1.20 mm were employed. Natural wood particles and the treated ones in cold or hot water (80 °C) were performed. The effects of the extractives solutions from the treatments applied to the wood particles
Matéria (Rio J.). Publicado em: 2016-12
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5. Performance analysis of the HRCTM HPGR in pilot plant
Abstract A pilot scale test program was conducted to evaluate the size reduction performance of HPGR (High Pressure Grinding Rolls) operating in different circuit configurations. For this purpose a series of pilot-HPGR locked cycle tests were performed with medium and high pressures to simulate the HPGR operation in closed circuit with a screen, with partial
Rem: Rev. Esc. Minas. Publicado em: 2016-06
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6. Promotion of cashmere growth by sulfur supplements in cashmere goats
This study was conducted to investigate effects of inorganic and organic sulfur supplements on cashmere growth and their differences. Thirty-six six-month-old female Liaoning cashmere goats with a body weight of approximately 25 kg and good health were randomly assigned to three treatments: control, ZnSO4 and HMBi (2-hydroxy-4-(methylthio) butyric acid isopr
R. Bras. Zootec.. Publicado em: 2013-11
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7. Dry-grinded ultrafine cements hydration. physicochemical and microstructural characterization
The aim of the present research work was the evaluation of the physicochemical and microstructural properties of two ultrafine cements, produced by dry grinding of a commercial CEM I 42.5N cement. The effect of grinding on particle size distribution was determined by laser scattering analyzer. All cements were tested for initial and final setting times, cons
Mat. Res.. Publicado em: 01/02/2013
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8. Características físicas da fibra e do fio dos algodoeiros arbóreo e herbáceo em melhoramento no Nordeste do Brasil.
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Campina Grande: EMBRAPA-CNPA. Publicado em: 2011
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9. Study on properties of rice husk ash and its use as cement replacement material
This paper investigates the properties of rice husk ash (RHA) produced by using a ferro-cement furnace. The effect of grinding on the particle size and the surface area was first investigated, then the XRD analysis was conducted to verify the presence of amorphous silica in the ash. Furthermore, the effect of RHA average particle size and percentage on concr
Materials Research. Publicado em: 2010-06
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10. Potencial de aproveitamento de resíduos de caulim paraibano para o desenvolvimento de argamassas de múltuplo uso. / Potential use of waste kaolin Paraiba for the development of multiple-use mortars.
In Paraíba, the industry of the kaolin, an activity of great importance to the State and local producers, generating large amounts of waste that is landfilled, impacting the environment. The National Council on the Environment (CONAMA) has been made responsible for waste management to their generators. This residue does not have recycling technology known d
Publicado em: 2007
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11. Secagem interminente com fluxo cruzado e altas temperaturas e sua influencia na qualidade do trigo duro (Triticum durum L.)
Product quality depend on the processing methods used and also on the end use of the product. Of alI commomly used processes drying is one of the most important steps to assure grain quality. The objective of this work was to verify the influence of intermittent cross flow drying and high temperatures on IACI002 durum wheat (Triticum durum L.) final quality.
Publicado em: 1997
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12. How Do Plants Achieve Tolerance to Phosphorus Deficiency? Small Causes with Big Effects1
Genotypic differences in phosphorus (P) uptake from P-deficient soils may be due to higher root growth or higher external root efficiency (micrograms of P taken up per square centimeter of root surface area). Both factors are highly interrelated because any additional P provided by externally efficient roots will also stimulate root growth. It will be necess
The American Society for Plant Biologists.