Expansive Clay
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Microstructural strength of four subtropical soils evaluated by rheometry: properties, difficulties and opportunities
ABSTRACT: The structural strength of soils has been extensively described by physical and mechanical properties evaluated on the mesoscale for different soils and management conditions. However, changes in the organization of the soil matrix at the microstructural level, which can be obtained by rheometry, are still seldom used in soil mechanics. Our aim was
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-04
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2. Clay Mineralogy of Brazilian Oxisols with Shrinkage Properties
ABSTRACT Shrinkage capacity (caráter retrátil in Portuguese) is a new diagnostic characteristic recently introduced in the Brazilian System of Soil Classification (SiBCS) to indicate shrink and swell properties observed in subtropical soils from highland plateaus in southern Brazil, specifically in Oxisols with brown colors. In soils located in road cuts e
Rev. Bras. Ciênc. Solo. Publicado em: 24/08/2017
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3. Rheological Parameters as Affected by Water Tension in Subtropical Soils
ABSTRACT Rheological parameters have been used to study the interaction between particles and the structural strength of soils subjected to mechanical stresses, in which soil composition and water content most strongly affect soil resistance to deformation. Our objective was to evaluate the effect of water tension on rheological parameters of soils with diff
Rev. Bras. Ciênc. Solo. Publicado em: 23/06/2016
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4. Planosols Developed in Different Geoenvironmental Conditions in Northeastern Brazil
ABSTRACT The semiarid region of northeastern Brazil has a large area occupied by Planosols, where in the State of Pernambuco these soils are mainly used for livestock farming and subsistence crops. The knowledge on these soils is limited, which compromises the understanding on their behavior, potentialities and limitations.This study aimed to analyze morphol
Rev. Bras. Ciênc. Solo. Publicado em: 2016
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5. Estudio estructural de arcillas de Chulucanas por difracción de rayos-X y método de Rietveld
Results of measures of X-ray diffraction showed a sequence of chemical and structural changes such as dehydration, decomposition and formation of new phases in clays subjected to gradual increases in temperature. The components of the samples were determined identifying Ca-montmorillonite, vermiculite, muscovite, kaolinite, chlorita, illite, quartz and albit
Matéria (Rio J.). Publicado em: 2014-06
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6. Caracterização de rejeitos de minério de ferro para uso em pavimentação / Characterization of iron ore tailings for use in paving
In this work it was carried out a series of laboratory tests towards chemical, mineralogical and geotechnical characterization of rejects from iron ore processing, for use in paving. Material sampling was done in specific points as they were generated during the beneficiation process along the cycle, in order to preserve their properties. The alternative app
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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7. AplicaÃÃo da estatÃstica para descrever o comportamento de um solo expansivo
Esta tese apresenta estudos realizados em uma Ãrea do municÃpio de Paulista, litoral norte do estado de Pernambuco. A maior parte dos solos à proveniente da aÃÃo do intemperismo sobre o calcÃrio margoso da FormaÃÃo Maria Farinha. Os estudos estÃo relacionados à variaÃÃo volumÃtrica e de umidade de uma argila expansiva nÃo saturada para trÃs co
Publicado em: 2009
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8. Soil quality in native forest and pasture eco-systems in the eastern Acre region of Western Amazon / Qualidade do solo em ecossistemas de mata nativa e pastagens na região leste do Acre, Amazônia Ocidental
The state of Acre is presently at the initial stage of converting its forests into pastures. Around 12% of its total area (19.200 km2) has been deforested. Out of this, approximately 81% (13.352 km2) have been utilized by several productive segments in Acre (farmers, land settlers, extractivists, riverine farmers and cattle producers), with extensive pasture
Publicado em: 2008
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9. APPLICATION OF ALUMINUM SLAG INCORPORATED IN LIGTHWEIGHT AGGREGATE / "Utilização da escória de alumínio na fabricação de argila expandida"
O presente trabalho estuda a viabilidade de utilização da escória de alumínio, que é um rejeito da indústria recicladora de alumínio, atualmente sem valor agregado, como elemento integrante na fabricação de argila expandida. A argila expandida é produzida a partir de argilas que produzam expansão piroplástica, que são utilizadas como agregado le
Publicado em: 2006