Unsaturated Sand
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Performance evaluation of different soil water retention functions for modeling of water flow under transient condition
ABSTRACT ABSTRACT: Description and prediction of water flow through unsaturated soils is necessary to understand their hydraulic properties, including soil water retention curve (SWRC). Many models have been developed for estimation of SWRC and many researchers compared water retention curve derived from these models with the measured values. In this paper,
Bragantia. Publicado em: 17/01/2019
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2. Experimental investigation on the effects of recycled aggregate on fracture behavior of polymer concrete
The sustainable management of solid wastes stimulates metallurgic and metal mechanics industries to look for safety applications for these wastes. The present paper examines the fracture behavior of polymer concrete (PC) manufactured with recycled foundry waste in substitution of fresh one. The recycled foundry sand is contaminated with polymer resin from th
Materials Research. Publicado em: 26/08/2011
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3. Fracture mechanics of polymer mortar made with recycled raw materials
The aim of this work is to show that industrial residues could be used in construction applications so that production costs as well as environmental protection can be improved. The fracture properties of polymer mortar manufactured with recycled materials are investigated to evaluate the materials behaviour to crack propagation. The residues used in this wo
Materials Research. Publicado em: 2010-12
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4. Experimental and numeric analysis of infiltration trenches in unsaturated zone / Análise experimental e numérica de trincheiras de infiltração em meio não saturado
This work assessed the hydraulic behavior of a experimental infiltration trench built at the EESC/USP and proposed a new sizing methodology for infiltration trench, for simulated events. In order to evaluate the hydraulic behavior experimental tests were taken to determine the infiltrated volume. The infiltrated volume was calculated through the difference b
Publicado em: 2009
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5. Geotechnical site characterization and study of an erosion process caused by urban setting / Investigação geotécnica e estudo de um processo erosivo causado por ocupação urbana
This dissertation presents geotechnical site characterization results of an erosion process area, in Bauru city, inland of São Paulo State, Brazil. The objective is to characterize the local soil and define the major causing factors for the erosion process evolution, which initiated with deforestation, soil sealing and discharge of pluvial and sewer water.
Publicado em: 2009
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6. Curvas de retenção de agua de um solo coluvionar de Campinas obtidas mediante tecnicas de laboratorio e de campo / Soil water characteristic curve of a colluvial soil determined by techniques laboratory and field
This research focuses in to determine the relationship of moisture content (or degree of saturation) versus the value of the suction matrix, known as soil water characteristic curve (SWCC), to the soil surface layer of the Field Experimental of Soil Mechanics and Foundation of UNICAMP. This profile consists of colluvial, lateritic, porous, on condition unsat
Publicado em: 2008
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7. Behavior of different piles, conducted in diabasic soil, submited to uplift efforts / Estudo do comportamento a tração axial de diferentes tipos de estacas em solo de diabasio da região de Campinas/SP
This research presents the behavior of different kinds of piles conducted in unsaturated diabasic porous soil submitted to uplift forces. For this research there were built the follow piles: three instrumented root piles with 12m length and 410mm of nominal diameter, one root pile with nominal diameter of 310mm and 23m length, two metallic piles type W250x32
Publicado em: 2008
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8. "Wetlands construídos" de fluxo vertical com meio suporte de solo natural modificado no tratamento de esgotos domésticos / "Wetlands construídos" de fluxo vertical com meio suporte de solo natural modificado no tratamento de esgotos domésticos / Vertical flow constructed wetlands systems with substract of natural soil for domestic wastewater treatment / Vertical flow constructed wetlands systems with substract of natural soil for domestic wastewater treatment
In Brazil, the municipalities with sewerage system is 52,2% of the total (PNSB, 2000). Therefore, it is low figure and there are regional discrepancies, as the percentage of attendance at the southern and southeastern regions are higher then at the northern northeastern and middle western. The situation is even worse at the rural area, where most localities
Publicado em: 2007
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9. Study on factors which affect the accuracy of the filter-paper method. / Estudo sobre fatores que influenciam a acurácia do método do papel-filtro.
The purpose of this work is to verify the susceptibility of the filter-paper method to variations in three experimental parameters: roughness of porous medium (structure of porous matrix), period of exposition of the filter-paper to pore water (equilibration time) and degree of deficiency in contact between the filter-paper and the porous medium. In order to
Publicado em: 2007
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10. Influência da dimensão e da sucção matricial no comportamento de fundações superficiais assentes em solo arenoso não-saturado / Size and matric influence in the behavior of shallow foundations in unsaturated sandy soils
The influence of matric suction and size of footings in the bearing capacity and settlement of shallow foundations in unsaturated sandy soils are analyzed. Fourteen plate load tests were performed in the first part of the research. Rigid metallic plates with diameters 0,20, 0,40, 0,80 m and one concrete circular footing with 1,50 m were used in the tests. Al
Publicado em: 2005
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11. Análise paramétrica da infiltração e sua influência na estabilidade de taludes em solo não saturado / Parametric analysis of infiltration and its influence on unsaturated soil slope stability
A parametric study is presented about water infiltration and its repercussion in the safety factor of unsaturated soil slopes. In the analysis it is adopted a reference slope with determined geometry according to the typical inclination for slopes in silty clayey sand, characteristic of the mid-western region of São Paulo State, in Brazil. The parametric an
Publicado em: 2004
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12. Assessing the Role of Pseudomonas aeruginosa Surface-Active Gene Expression in Hexadecane Biodegradation in Sand
Low pollutant substrate bioavailability limits hydrocarbon biodegradation in soils. Bacterially produced surface-active compounds, such as rhamnolipid biosurfactant and the PA bioemulsifying protein produced by Pseudomonas aeruginosa, can improve bioavailability and biodegradation in liquid culture, but their production and roles in soils are unknown. In thi
American Society for Microbiology.