Sand Extraction
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. Shear Strength of a typical soil from Manaus, Brazil, stabilized with ceramic residue additive
ABSTRACT The purpose of this study is to determine the geotechnical behavior of a clayey surface soil typical to the Manaus region (Amazonas, Brazil), when mixed with ceramic powder from brick residue produced by potteries located in the county of Iranduba, Amazonas, Brazil, and with residual sand (the reference mixture), commonly used in pavements in the re
Matéria (Rio J.). Publicado em: 10/06/2019
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2. Enhanced settling of mature fine tailings (MFT) by paramagnetic nanofluids based on nanoiron
ABSTRACT The extraction of bitumen from sand by utilizing hot water processes results in the production of a slurry waste which is stored in so called “tailings ponds”. Within these ponds, while fast settling sand particles segregate from the slurry in relatively short time, the fines fraction accumulates in the center of the pond and then settles, becom
Matéria (Rio J.). Publicado em: 19/07/2018
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3. Wound healing properties and mucilage content of Pereskia aculeata from different substrates
Physiologic growth parameters Wound healing Pereskia aculeata Mill., Cactaceae, is a cactus with high mucilage production, well-known for its nutritional properties. Folk use consists on skin injuries, and mucilage is probably involved in the wound healing activity. This work studied some aspects of its cultivation, specifically regarding soil (substrate), t
Rev. bras. farmacogn.. Publicado em: 2014-12
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4. Comparison of DNA extraction protocols for microbial communities from soil treated with biochar
Many studies have evaluated the effects of biochar application on soil structure and plant growth. However, there are very few studies describing the effect of biochar on native soil microbial communities. Microbial analysis of environmental samples requires accurate and reproducible methods for the extraction of DNA from samples. Because of the variety amon
Braz. J. Microbiol.. Publicado em: 2014
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5. Avaliação do ciclo de vida da areia em mineradora de pequeno porte, na região de São José do Rio Preto - SP / Life Cycle Assessment of sand in small mining in São José do Rio Preto region - São Paulo.
The mining of sand, although of great socio-economic importance to the national scene, has several negative impacts throughout the production chain. Among some of the interference in the natural environment occurs, soil degradation, air pollution and stress in the fauna and flora. This fact has generated great interest in mechanisms that mitigate or prevent
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2012
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6. Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida / Efeito da Taxa de Resfriamento e dos Tratamentos Térmicos sobre as Propriedades Mecânicas da Liga Al-Si-Mg (A356.0) Fundida
The A356.0 alloy is widely used in aerospace and automotive industry and other structural applications which require high mechanical strength. The control of solidification cooling rate and heat treatments are necessary to obtain more appropriate microstructures resulting in improvement of their properties. In this paper was evaluated the influence of coolin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011
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7. Padrão de germinação de sementes e estabelecimento de mudas de guanandi (Calophyllum brasiliense Cambess.)
CHAPTER II: Calophyllum brasiliense Cambess. is a tree, typical of tropical rainforests, with seed germination variable and uneven due to restrictions of the layers of the integument. The objective was to characterize the dormancy of seeds of species by their ability to soak, germination, emergence, distribution of germination over time and the timing and qu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2011
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8. Substituição da areia natural por areia de britagem de rochas basálticas para argamassas de revestimento
The present study has the purpose of evaluate the artificial sand, in substitution the extration sand, in mortars of covering. The substitution of percentage of the extration sand was also evaluated. The artificial sand is an alternative to the sand of extration in mortars, in view of the gradual exhaustion of the deposits of sand next to the great consumers
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2010
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9. Sistemática para implantação de controle operacional para gestão ambiental em setor de beneficiamento de areia em industria de fundição
The issues regarding the protection of the environment are in evidence nowadays. There is a very broad legal framework in the sense of creating both preventive and punitive measures. This way, the industrial companies are the main focus of social observation. There are also normative and market incentives in the sense of creating conditions to fulfill the en
Publicado em: 2009
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10. Identification of zygotic and nucelar seed embryos and agronomic and molecular characterization of Ubá mango tree accesses / Identificação de embriões zigóticos e nucelares de sementes e caracterização agronômica e molecular de acessos de mangueira Ubá
The objectives of this work were to identify using ISSR molecular markers, the genetic origin, whether zygotic or nucelar, of seedlings relating to their vigor; to characterize the fruit physically and chemically and to evaluate the genetic diversity of Ubá mango tree accesses sampled in Visconde do Rio Branco, Viçosa and Ubá, based on phenotypic and geno
Publicado em: 2009
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11. Processos dinÃmicos e evolutivos da zona costeira de Itamaracà por sensoriamento remoto e medidas in situ
The coastal zone of Itamaracà is like a highly dynamic environment where land and oceanic processes interact altering frequently coastal characteristics. In this context, this current study examines the responsible processes of such changes from the development and application of methodologies, which includes digital image processing and the obtaining of in
Publicado em: 2009
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12. Influência da substituição da areia natural pela areia de britagem no comportamneto do concreto auto-adensável
This study has the purpose of evaluate the effects of the substitution of natural sand by artificial sand, in self-compacting concrete (SCC). The natural sand, which is a usual component of concretes, has becoming more and more rare due to the deplete of deposits located close to the huge urban centers, as well as the extraction?s restrictions imposed by env
Publicado em: 2008