Mineral Additions
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Crescimento e teor de cromo em mamoneira cultivada em solo receptor de resíduos de curtume e carboníferos
RESUMO A produção de resíduos tem aumentado em proporção direta com a industrialização dos países. Sendo assim, a disposição adequada desses resíduos é uma questão largamente discutida entre os órgãos ambientais. Por isso, o objetivo deste trabalho foi estudar o efeito residual de adições sucessivas de resíduos de curtume e da mineração d
Eng. Sanit. Ambient.. Publicado em: 20/12/2019
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2. Mineral deposition promoted by resin-based sealants with different calcium phosphate additions
Abstract The aim of this study was to evaluate the influence of different calcium phosphates (CaPs) on the physical, biological, and remineralizing properties of experimental resin-based sealants (RBSs). Triethylene-glycol dimethacrylate (90wt%) and bisphenol A-glycidyl methacrylate (10wt%) were used to produce resin-based sealants. Hydroxyapatite (SHAp), α
Braz. oral res.. Publicado em: 25/11/2019
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3. Concretos com agregados reciclados de resíduos de construção e demolição e adições minerais: uma análise bibliográfica
RESUMO Os impactos ambientais causados pela produção do concreto precisam ser reduzidos para torná-lo um material mais sustentável. O uso de agregados reciclados em substituição aos agregados naturais e das adições minerais em substituição parcial ao cimento são alternativas que podem tornar o concreto um material com menor carga de poluentes asso
Matéria (Rio J.). Publicado em: 10/06/2019
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4. Peças Cerâmicas fabricadas usando pó de granito com adição dos produtos da combustão do carvão mineral: Caracterização Mecânica
RESUMO Foi estudada a viabilidade técnica da utilização de resíduos de granito como matéria prima na fabricação de corpos de prova cerâmicos, com adições dos Produtos da Combustão do Carvão Mineral (PCC’s) como fase reforço. Os materiais utilizados foram granito Asa Branca (RGAB) e os Produtos da Combustão do Carvão mineral (PCC´s), nas con
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Industrial Wastes as Alternative Mineral Addition in Portland Cement and as Aggregate in Coating Mortars
This paper presents an evaluation study of wastes from pulp and paper as well as construction and demolition industries for application in cement-based materials. The alternative raw materials were used as a source of calcium carbonate (CaCO3) and as pozzolanic material (water-reactive SiO2) in partial replacement of Portland cement. In addition to the hydra
Mat. Res.. Publicado em: 04/09/2017
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6. PERFORMANCE OF AN AGRICULTURAL DIESEL ENGINE USING DIFFERENTS FUELS
ABSTRACT The use of fuels for agricultural Diesel engines cycle, both of mineral origin (Diesel) or vegetable and animal origin (biodiesel) can significantly alter its performance. Therefore, the aim of this study was to quantify the change in torque, power and consumption of agricultural Diesel engine fuel using minerals and vegetables fuels. It was used a
Eng. Agríc.. Publicado em: 2017-02
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7. Changes in Soil Organic Carbon and Nitrogen Stocks in Long-Term Experiments in Southern Brazil Simulated with Century 4.5
ABSTRACT The Century model has successfully simulated soil organic matter dynamics in many agroecosystems. However, initial applications in southern Brazil produced mixed results. The objective of this study was to calibrate and validate Century 4.5 to simulate soil carbon (C) and nitrogen (N) dynamics under diverse soil management practices in subtropical B
Rev. Bras. Ciênc. Solo. Publicado em: 31/05/2016
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8. Development and evaluation of iron-rich meatloaves containing pork liver for schoolchildren
AbstractIron deficiency is a highly prevalent nutritional problem worldwide and it impacts on the cognitive development of children. Therefore, the aim of this research was to develop meatloaf with high iron content by using in their formulations pork liver. Meatloaves were prepared with additions of 9.98% and 13.31% (formulations A and B) of pork liver in o
Food Sci. Technol. Publicado em: 25/08/2015
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9. Cement - steatite composites reinforced with carbon fibres: an alternative for restoration of brazilian historical buildings
Steatite is a mineral which has been employed in the carving of elements in facades of Brazilian historical buildings and churches since the 17th century. Over the years, many of those historical buildings suffered the consequences of weathering with a current need for restoration. Recently a special cement-based mortar containing additions of fine powder wa
Materials Research. Publicado em: 25/02/2011
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10. Effect of steatite waste additions on the physical and mechanical properties of clay composites
Mineral rock wastes are being widely investigated due to possible damage to the environment when discarded indiscriminately in the nature, but also because of their great potential as ceramic raw materials. This work aims to study the effect of steatite particle additions on the mechanical properties of clay composites. A comprehensive series of experiments
Materials Research. Publicado em: 2010-12
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11. Avaliação da capacidade de proteção contra a corrosão da arma-dura induzida por cloretos de concretos com adições minerais e inibidores de corrosão / Evaluation of the ability to protect against corrosion of the gun hard-induced chloride concrete with mineral additions and corrosion inhibitors
O aumento da durabilidade é um aspecto primordial para os elementos estruturais de concreto, em especial aqueles constituintes das estruturas de geração de energia em parques eólicos, sujeitos ao fenômeno de corrosão das armaduras. Nesse contexto, este trabalho tem como objetivo geral avaliar a capacidade de proteção de diferentes concretoS frente ao
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/09/2009
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12. EFEITOS NAS PROPRIEDADES MECÂNICAS, ELÁSTICAS E DE DEFORMAÇÃO EM CONCRETOS COM ALTOS TEORES DE ESCÓRIA E CINZA VOLANTE. / EFFECTS ON MECHANICAL, ELASTIC AND DEFORMATION PROPERTIES ON CONCRETE WITH HIGH LEVELS OF SLAG AND FLY ASH.
The use of byproducts and industrial waste as pozzolanic, is an alternative to achieve the sustainability, economy and durability in concrete structures. This survey has as its purpose to analyze the effect on mechanical, elastic and deformation properties on concrete with a high level of granulated slag from blast furnace and fly ash in place of Portland bu
Publicado em: 2009