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    Wyświetlanie 1-24 z 24
    Tytuł:
    Changes of pore orientation in soil lessive caused by tillage measures
    Autorzy:
    Bryk, M.
    Słowińska-Jurkiewicz, A.
    Kołodziej, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11043487.pdf
    Data publikacji:
    2005
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    soil structure
    pore
    soil pore
    morphometry
    image analysis
    tillage
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2005, 60; 229-236
    0365-1118
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of monovalent cations on soil structure. Part I. Results of an Iranian soil
    Autorzy:
    Farahani, Elham
    Emami, Hojat
    Keller, Thomas
    Fotovat, Amir
    Khorassani, Reza
    Powiązania:
    https://bibliotekanauki.pl/articles/972451.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    aggregate stability
    dispersible clay
    potassium
    soil pore size
    water retention
    Opis:
    This study investigated the impact of monovalent cations on clay dispersion, aggregate stability, soil pore size distribution, and saturated hydraulic conductivity on agricultural soil in Iran. The soil was incubated with treatment solutions containing different concentrations (0-54.4 mmol l-1) of potassium and sodium cations. The treatment solutions included two levels of electrical conductivity (EC=3 or 6 dS m-1) and six K:Na ratios per electrical conductivity level. At both electrical conductivity levels, spontaneously dispersible clay increased with increasing K concentration, and with increasing K:Na ratio. A negative linear relationship between percentage of water-stable aggregates and spontaneously dispersible clay was observed. Clay dispersion generally reduced the mean pore size, presumably due to clogging of pores, resulting in increased water retention. At both electrical conductivity levels, hydraulic conductivity increased with increasing exchangeable potassium percentage at low exchangeable potassium percentage values, but decreased with further increases in exchangeable potassium percentage at higher exchangeable potassium percentage. This is in agreement with earlier studies, but seems in conflict with our data showing increasing spontaneously dispersible clay with increasing exchangeable potassium percentage. Our findings show that clay dispersion increased with increasing K concentration and increasing K:Na ratio, demonstrating that K can have negative impacts on soil structure.
    Źródło:
    International Agrophysics; 2018, 32, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza zmian dystrybucji porów pod wpływem cyklicznego zamrażania-rozmrażania w wybranych gruntach spoistych
    Analysis of pore-size distribution under the influence of cyclic freeze-thaw in selected cohesive soils
    Autorzy:
    Kurpias-Warianek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/40281.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    geotechnika
    grunty spoiste
    zamrazanie-rozmrazanie cykliczne
    mikrostruktura
    pory osrodka
    rozklad przestrzenny
    wskaznik nierownomiernosci rozkladu
    wskaznik podobienstwa krzywych
    geotechnics
    cohesive soil
    freeze-thaw cycle
    soil microstructure
    soil pore
    soil pore distribution
    distribution inequality index
    curve similarity index
    Źródło:
    Acta Scientiarum Polonorum. Architectura; 2011, 10, 1
    1644-0633
    Pojawia się w:
    Acta Scientiarum Polonorum. Architectura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image analysis as the quantitative estimation of the structure of agricultural materials
    Autorzy:
    Haman, J.
    Konstankiewicz, K.
    Pukos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/26257.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    statistical method
    soil structure
    deterministic method
    structure
    agricultural material
    soil pore
    stochastic method
    probabilistic method
    stress measurement
    image analysis
    agrophysics
    Źródło:
    International Agrophysics; 1995, 09, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of image analysis for soil macropore characterization according to pore diameter
    Autorzy:
    Glab, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/26286.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil macropore
    soil structure
    soil macroporosity
    application
    pore diameter
    image analysis
    macroporosity
    Źródło:
    International Agrophysics; 2007, 21, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pore size distribution and amount of water available for plants in arable soils of Poland
    Autorzy:
    Witkowska-Walczak, B.
    Walczak, R.
    Ostrowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/24057.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    Polska
    pore size
    soil
    porosity
    water availability
    distribution
    arable soil
    plant
    Źródło:
    International Agrophysics; 2003, 17, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft Soil Overconsolidation and CPTU Dissipation Test
    Autorzy:
    Bałachowski, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/241488.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    CPTU
    DMT
    pore pressure
    stress history
    soft soil
    Opis:
    Stress state and stress history of subsoil under the flood embankment was evaluated with CPTU and DMT tests. The CPTU dissipation tests in soft soils under the central part of the embankment and on the upstream and downstream sides were performed. The shape of pore water dissipation curve reflects stress state and stress history. Monotonic decay of water pore pressure was found for normally consolidated soils. Dilatory pore pressure response is typical for overconsolidated soils. Methods for the flow characteristics determination (coefficient of consolidation and hydraulic conductivity) were presented.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2006, 53, 2; 155-180
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possible effects of soil contamination by light non-aqueous phase liquids [LNAPLs] on soil water parameters and their consequences
    Autorzy:
    Becher, H.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/24436.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    surface tension
    soil profile
    soil water
    pore size
    Germany
    water regime
    distribution
    water retention
    soil contamination
    Źródło:
    International Agrophysics; 2002, 16, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water conductivity of Arctic zone soils (Spitsbergen)
    Autorzy:
    Witkowska-Walczak, B.
    Slawinski, C.
    Bartminski, P.
    Melke, J.
    Cymerman, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/25209.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    water conductivity
    soil
    grain size
    distribution
    pore size
    Arctic zone
    Spitsbergen
    Opis:
    The water conductivity of arctic zone soils derived in different micro-relief forms was determined. The greatest water conductivity at the 0-5 cm depth for the higher values of water potentials (> -7 kJ m-3) was shown by tundra polygons (Brunic-Turbic Cryosol, Arenic) – 904-0.09 cm day-1, whereas the lowest were exhibited by Turbic Cryosols – 95-0.05 cm day-1. Between -16 and -100 kJ m-3, the water conductivity for tundra polygons rapidly decreased to 0.0001 cm day-1, whereas their decrease for the other forms was much lower and in consequence the values were 0.007, 0.04, and 0.01 cm day-1 for the mud boils (Turbic Cryosol (Siltic, Skeletic)), cell forms (Turbic Cryosol (Siltic, Skeletic)), and sorted circles (Turbic Cryosol (Skeletic)), respectively. In the 10-15 cm layer, the shape of water conducti-vity curves for the higher values of water potentials is nearly the same as for the upper layer. Similarly, the water conductivity is the highest – 0.2 cm day-1 for tundra polygons. For the lower water potentials, the differences in water conductivity increase to the decrease of soil water potential. At the lowest potential the water conductivity is the highest for sorted circles – 0.02 cm day-1 and the lowest in tundra polygons – 0.00002 cm day-1.
    Źródło:
    International Agrophysics; 2014, 28, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of wood-derived biochar on the hydraulic characteristics of compacted soils: Its influence on simulated farmland carbon sequestration
    Autorzy:
    Ahmed, A.
    Kurian, J.
    Satyanarayana, S.
    Raghavan, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083067.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil biochar mixture
    water retention
    pore-size
    distribution
    hydraulic conductivity
    carbon sequestration
    Opis:
    The addition of biochar is often proposed to increase agricultural soil quality and crop yield, while at the same time sequestering carbon from the atmosphere to help mitigate global climate change. In this research, the pore-size distribution, and saturated hydraulic conductivity of sandy loam and clay loam soils amended with varying dosages (0-10% dry basis) and two different particle sizes (0.5-420 μm (PS1) or 421-841 μm (PS2)) of wood-derived biochar were investigated under compacted conditions (5, 10, or 15 standard Proctor rammer blows (5B, 10B, or 15B, respectively)). In the 5B compacted SL (SL-5B) soil, the volume of the soil fissures and transmission pores decreased, while the volume of the storage pores (SP) increased with increasing wood-derived biochar dosage. 23.1±0.9% of the volume of the 5B compacted clay loam (CL-5B) are storage pores, this value increased to 27.4±2.0% upon amendment with 10% PS1. The saturated hydraulic conductivity of the sandy loam-5B soil amended with 10% PS1 decreased from 6.8±0.3 to 0.80±0.03 mm h-1. The sandy loam farmland C emissions decreased by 0.071 tC ha-1 y-1, whereas CL farmland C emissions decreased by 0.091 tC ha-1 y-1.
    Źródło:
    International Agrophysics; 2021, 35, 2; 167-177
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rayleigh Waves Transformation in Liquefying Water-saturated Sands
    Autorzy:
    Staroszczyk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/241359.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    Rayleigh surface wave
    water-saturated sand
    excess pore pressure generation
    soil liquefaction
    Opis:
    The behaviour of a water-saturated sand deposit subjected to dynamic loads induced by the propagation of Rayleigh surface waves is analysed. Cyclic shearing of the saturated sand matrix due to ground motions results in the development of excess pore pressures in the soil and its subsequent liquefaction. The phenomena of pore pressure generation and soil liquefaction are investigated within the framework of a compaction theory for saturated granular media. The results of calculations, carried out by a finite-element method, illustrate the evolution of pore pressures and the development of liquefaction zones in the soil, and show the variation of surface wave parameters with the progressive degradation of the strength of the subsoil.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2016, 63, 2-3; 173-190
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simulating particle packing for soil porosity investigations
    Autorzy:
    Czachor, H.
    Konstankiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2056984.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    moisture
    packing
    grain size
    soil
    pore
    particle packing
    capillary pressure
    porosity
    distribution
    Źródło:
    International Agrophysics; 1995, 09, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of image analysis for evaluation of mercury intrusion porosimetry results
    Autorzy:
    Kozak, E.
    Pezda, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/26305.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    quantitative method
    convenient method
    pore size
    soil aggregate
    mercury intrusion
    distribution
    image analysis
    Źródło:
    International Agrophysics; 1995, 09, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of soil-peat-rubble mixtures by mercury intrusion porosimetry
    Autorzy:
    Hajnos, M.
    Bowanko, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/26378.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    mercury intrusion porosimetry
    organic matter
    soil environment
    temperature
    urban soil
    soil-peat-rubble mixture
    granulometric composition
    pore property
    cyclic change
    rubble
    Źródło:
    International Agrophysics; 2002, 16, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in pore size distribution and aggregate stability of two soils under long term tillage systems
    Autorzy:
    Pranagal, J.
    Lipiec, J.
    Domzal, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/25263.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    bulk density
    long-term tillage system
    pore size
    change
    soil
    distribution
    aggregate stability
    tillage system
    Źródło:
    International Agrophysics; 2005, 19, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of marble powder amendment on hydraulic properties of a sandy soil
    Autorzy:
    Farhadi-Machekposhti, M.
    Valdes-Abellan, J.
    Pla, C.
    Benavente, D.
    Pachepsky, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082885.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    saturated hydraulic conductivity
    soil water
    retention curve
    field capacity
    plant available water
    pore size
    distribution
    Opis:
    Marble powder is one of carbonate rock amendments that is used to improve soil reaction. We hypothesized that the powdered marble addition can cause favorable changes in hydraulic properties of sandy soils. Six levels of marble powder addition to an aridisol soil (0%; M0; 5%; M5; 10%; M10; 15%; M15; 20%; M20 and 25%, M25; by bulk volume) were analyzed in triplicate. The saturated hydraulic conductivity and soil water retention curves were obtained. Pore space properties were investigated using soil water retention curves, mercury intrusion porosimetry and scanning electron microscopy. The saturated hydraulic conductivity significantly decreased (between 83 and 97% for M5 and M25 respectively) and parameters α and n of the van Genuchten model significantly decreased in marble-amended soils. Both field capacity and permanent wilting point increased with the addition of marble powder. Plant-available water, increased significantly until 10% of marble powder application; higher percentages of application did not provide additional significant changes in the plant-available water. Pore space distributions from soil water retention curves parameters showed an increase in the pore size range and a decrease in the average pore size; pore space distribution from the scanning electron microscopy also showed the presence of a new family of dominant pore sizes which was not detected by the soil water retention curves parameters approach. It was concluded that the addition of marble powder can improve the ability of soil to store water providing an advantage for irrigation water management in water scarce environments. Further research will have to address the impact of marble powder amendment under field semi-arid conditions.
    Źródło:
    International Agrophysics; 2020, 34, 2; 223-232
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical analysis of consolidation settlement and creep deformation of artificial island revetment structure in a large-scale marine reclamation land project
    Autorzy:
    Zhao, J.
    Zhou, T.
    Wang, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/258848.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    marine reclamation land
    Soft-Soil-Creep model
    consolidation settlement
    pore pressure
    micro-structure
    numerical analysis
    Opis:
    In order to analyze the influential factors of soft foundation settlement in a marine reclamation land project, the consolidation settlement and pore pressure dissipation of the entire area are numerically simulated using Soft-SoilCreep Model, in which the PLAXIS finite element software for professional geotechnical engineering is applied and empirical data of Japanese Kansai’s airport project are used. Moreover, the figures of settlement and pore pressure results in the different basic period are drawn, and the corresponding analysis conclusions are obtained based on the comparison among the results from the computational parameters of depth. In addition,, the influence rules of various parameters on settlement results is concluded through running the parameter sensitivity analysis in Soft-Soil-Creep Model, and the experience and conclusions can be for reference in the design and con-struction of similar large-scale marine reclamation land project. Also the empirical value method of the creep index has not been applied widely. Further research needs to be done.
    Źródło:
    Polish Maritime Research; 2015, S 1; 35-42
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porosity and water useful for plants in Luvisols created from sandy silt and silt
    Autorzy:
    Witkowska-Walczak, B.
    Turski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/25087.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    silt
    sandy-silt
    pore size
    soil
    development
    crop yield
    plant growth
    porosity
    water regime
    distribution
    water balance
    Źródło:
    International Agrophysics; 2004, 18, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructural changes of expansive clays during dehydration caused by suction pressure - a case study of Miocene to Pliocene clays from Warsaw (Poland)
    Autorzy:
    Wójcik, Emilia
    Trzciński, Jerzy
    Łądkiewicz-Krochmal, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/139432.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    clay pastes
    quantitative image analysis
    pore space
    soil-water curve
    pasty gliniane
    analiza ilościowa obrazów
    rozkład porów
    gleba
    woda
    Opis:
    This paper presents the qualitative and quantitative characteristics of microstructures of Neogene clays from Warsaw, Poland. Scanning Electron Microscope (SEM) studies were used for the microstructural analysis of natural clays and clay pastes. Qualitative microstructural changes were observed: from a honeycomb microstructure for the initial clay paste to a turbulent microstructure for the dried paste. It was also noticed that water loss caused by the increase of the suction pressure had a significant impact on the microstructural transformations. Significant changes in the quantitative values of the pore space parameters were also observed. Increase of suction pressure and water loss caused a decrease in porosity and changes in the values of morphometric parameters, such as pore distribution; for example, a significant increase of the number of pores of 0−10 μm size and changes in the geometric parameters of the pore space were noticed with the increase of suction pressure. The pore space with larger isometric pores was modified into a pore space with the dominance of small anisometric and fissure-like pores. The increased degree of anisotropy from a poorly-oriented to a highly-oriented microstructure was also observed. After rapid shrinkage the reduction in the number of pores, maximum pore diameter, and total pore perimeter was recorded. The process of rapid water loss induced the closure of very small pores. A similar effect was observed during the increase of the suction pressure, where the closure of pore space of the clay pastes was observed very clearly.
    Źródło:
    Acta Geologica Polonica; 2019, 69, 3; 465-488
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wave-induced stresses and pore pressures near a mudline
    Autorzy:
    Sawicki, A.
    Staroszczyk, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/48728.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    water pressure
    wave-induced stress
    elasto-plasticity
    earth pressure coefficient
    soil permeability
    pore water saturation
    yield condition
    seabed mechanics
    Opis:
    Conventional methods for the determination of water-wave induced stresses in seabeds composed of granular soils are based on Biot-type models, in which the soil skeleton is treated as an elastic medium. Such methods predict effective stresses in the soil that are unacceptable from the physical point of view, as they permit tensile stresses to occur near the upper surface of the seabed. Therefore, in this paper the granular soil is assumed to behave as an elastic-ideally plastic material, with the Coulomb-Mohr yield criterion adopted to bound admissible stress states in the seabed. The governing equations are solved numerically by a finite difference method. The results of simulations, carried out for the case of time-harmonic water waves, illustrate the depth distributions of the excess pore pressures and the effective stresses in the seabed, and show the shapes of zones of soil in the plastic state. In particular, the effects on the seabed behaviour of such parameters as the degree of pore water saturation, the soil permeability, and the earth pressure coefficient, are illustrated.
    Źródło:
    Oceanologia; 2008, 50, 4; 539-555
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charakterystyka rozkładu ciśnienia porowego w badaniach konsolidacji past gruntowych z północnopolskich glin zwałowych
    Characteristics of pore pressure distribution during consalidation tests of soil paste of glacial tills from northern Poland
    Autorzy:
    Kowalczyk, S.
    Szczepański, T.
    Dobak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/403217.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
    Tematy:
    badania konsolidacji typu CRL
    ciśnienie porowe
    pasta gruntowa
    consolidation tests at constant rate of loading (CRL)
    pore pressure
    soil paste
    Opis:
    Tematyka artykułu dotyczy zagadnienia dystrybucji ciśnienia porowego w badaniach konsolidacji przy stałej prędkości obciążenia (CRL). Badania przeprowadzono na pastach gruntowych sporządzonych z glin zwałowych zlodowacenia Wisły z okolic Susza na Pojezierzu Iławskim. Pasta gruntowa o naturalnym składzie granulometrycznym, lecz zmienionej strukturze (homogenicznej) i wilgotności, przygotowana została tak, aby uzyskać dwufazowy (nasycony wodą) ośrodek gruntowy. Przyjęta metodyka badań umożliwia porównanie otrzymanych wyników z teoretycznym modelem zmian wartości ciśnienia porowego w warunkach liniowego przyrostu naprężenia. W przeprowadzonych badaniach zastosowano różne prędkości obciążenia, co pozwoliło na przedstawienie wpływu tego czynnika na parametry charakteryzujące dystrybucję ciśnienia porowego. Studia nad zmiennością ciśnienia wody w porach w warunkach zróżnicowanych wymuszeń mają istotne znaczenie dla doskonalenia metod oceny parametrów filtracyjno- konsolidacyjnych ośrodka gruntowego
    The question of pore pressure distribution during consolidation tests at constant rate of loading (CRL) was presented in the paper. The tests were carried out on soil paste of glacial tills of Wisla glacial period obtained from the area of Susz in Pojezierze Iławskie. The disturbed (homogenous) soil paste of natural particle size distribution was prepared in such a way to obtain biphasic − saturated soil. The chosen method allowed comparing the obtained test results with theoretical model of pore pressure changes during linear incremental loading. Various load rates were used so that the influence of the rate on pore pressure distribution could be presented. The research on variability of pore pressure under various loading conditions is crucial in developing permeability-consolidation parameters investigation methods.
    Źródło:
    Budownictwo i Inżynieria Środowiska; 2013, 4, 2; 127-134
    2081-3279
    Pojawia się w:
    Budownictwo i Inżynieria Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stereology as an image analysis method of agricultural materials
    Autorzy:
    Bodziony, J.
    Konstankiewicz, K.
    Pukos, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/26013.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    root system
    plant system
    soil structure
    structure
    cell
    grain size
    grain
    loess
    agricultural material
    cell wall
    strength parameter
    image analysis
    pore
    stereological analysis
    potato
    Źródło:
    International Agrophysics; 1995, 09, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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