Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "silt" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 25
Tytuł:
Efficiency comparison of mixture formulations in the stabilisation/solidification of the loess silt contaminated with zinc in terms of mechanical properties
Autorzy:
Lal, Agnieszka
Fronczyk, Joanna
Franus, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/27314384.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
loess silt
alternative binder
activator
unconfined compressive strength
Opis:
The effectiveness of various types of binders in stabilizing/solidifying (S/S) contaminated soils is strongly dependent on the type of soil and contaminants present. The literature abounds with studies of stabilisation/solidification of clayey soils, which provides a background for initial assumptions in design of the method application for contamination of this type of soil. However, studies on the stabilisation/solidification of loess silt contaminated with heavy metals are not available. Filling this deficiency is important in order to ensure the rapid adoption of the most effective remedies in case of contamination and their immediate implementation in the subsoil. This paper has enabled the determination of the most effective mixture among the examined for the remediation of loess silt contaminated with zinc in terms of compressive strength. Strengths were determined with the implementation of 30% Portland cement (2.63 MPa), 30% of fly ash-cement mixture (2.21 MPa), an incinerated sewage sludge ash-cement mixture (0.93 MPa) and mixtures in which cement was replaced by an MgO activator (0.18 MPa for fly ash and 0.63 MPa for incinerated sewage sludge ash). In addition, the determination of strength was carried out for samples containing a mixture of fly ash, activator and cement (0.26 MPa) and incinerated sewage sludge ash, activator and cement (0.26 MPa), with weight ratios of 5:4:1 respectively. In summary, fly ash and cement in a 2:1 ratio can be considered the most effective binding mix in terms of unconfined compressive strength increase.
Źródło:
Budownictwo i Architektura; 2023, 22, 1; 25--35
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the Prospects of Application of Sewage Sludge from Lviv Wastewater Treatment Plants for the Purpose of Conducting the Biological Reclamation
Autorzy:
Vankovyсh, Dmytro
Bota, Oleh
Malovanyy, Myroslav
Odusha, Mykola
Tymchuk, Ivan
Sachnyk, Iryna
Shkvirko, Oksana
Garasymchuk, Vasyl
Powiązania:
https://bibliotekanauki.pl/articles/1839083.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sewage sludge
monitoring
agroecological research
heavy metals
silt field
Opis:
The prospects of using the sewage sludge from Lviv wastewater treatment plants for biological reclamation was assessed. On the basis of the results of the monitoring of the qualitative and quantitative composition of sewage sludge accumulated in silt fields, the dependences of the distribution of sanitary-microbiological and ecological-chemical characteristics of the accumulated sludge were investigated. Agroecological laboratory studies on estimating the possibility of using sewage sludge in a mix with natural sorbents as a substrate for cultivation of plants was carried out.
Źródło:
Journal of Ecological Engineering; 2021, 22, 2; 134-143
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyka określania koncentracji pierwiastków promieniotwórczych frakcji pylastej wydzielonej z przedkarpackich utworów mioceńskich
Methodology for defining the concentration of radioactive elements in the silt fraction separated from Carpathian Foredeep Miocene formations
Autorzy:
Skupio, Rafał
Łykowska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1834054.pdf
Data publikacji:
2020
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
silt
promieniowanie gamma
miocen
naturalna promieniotwórczość skał
radiometria
gamma ray
Miocene
natural radioactivity in rocks
radiometry
Opis:
The research was performed on seven samples of Miocene rocks collected from the core. The selected material was represented by sandstones, mudstones and claystones. The main goal of the work was to separate the silt fraction and to determine its impact on the level of radioactivity of the Miocene rocks of the Carpathian Foredeep. In this study, the silt fraction separation method developed in the Well Logging Department of INiG – PIB was used. Wentworth classification was used to determine the size of the silt, assuming its range from 4 to 63 µm. The selected rock material was prepared in several stages using the methods of freezing, sieving, centrifugation and sedimentation. Additional tests, including mineralogical XRD, chemical XRF and matrix density measurements were performed to determine the rock types and their properties. A number of radiometric tests were performed to determine the content of natural radioactive elements. The analyses were carried out on a small number of tests because of their long preparation and limited material availability. Reliable determination of the parameters of individual grain fractions required verification and improvement of the applied research methods. Radiometric measurements determining the natural content of potassium 40K, uranium 238U and thorium 232Th were carried out in the RT-50 equipped with a three-inch NaI(Tl) crystal. In the first place, standard analyses were conducted for dried and crushed samples of Miocene claystones, mudstones and sandstones. Further measurements were made on the separated silt fraction and in the case of one sample, also on the remaining fractions (clay and sand). In this case, the analyses were carried out repeatedly using a new procedure enabling the determination of radioactive elements in low-mass samples. The results of the work allowed approximate determination of the natural gamma radioactivity of the silt. An important conclusion is that, silt is no more radioactive than the other components of the rock. This paper also attempted the estimation of the impact of heavy mineral content on the natural radioactivity of the Miocene rocks. For tests purpose, minerals with a density above 2.85 g/cm3 were separated from the rock samples and a series of analyses were carried out once again. The obtained results were minimally understated but close enough to the samples before separation. It can be concluded that the heavy minerals in the tested samples do not affect the total radioactivity of the rocks in the research area.
Źródło:
Nafta-Gaz; 2020, 76, 10; 679-687
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Desert loess: a selection of relevant topics
Autorzy:
Smalley, Ian
Marshall, John
Fitzsimmons, Kathryn
Whalley, W. Brian
Ngambi, Samson
Powiązania:
https://bibliotekanauki.pl/articles/94478.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Parna
adobe
silt formation in deserts
large dust
small dust
Martian deserts
bee-eaters nesting in loess
glina
muł
pustynia
pył
Mars
żołna
less
Opis:
In discussions on loess, two types are often demarcated: glacial loess and desert loess. The origin of the idea of desert loess appears to lie with V.A. Obruchev who observed wind-carried silt on the Potanin expedition to Central Asia in 1895. It might be considered that desert loess would be defined as loess associated with deserts but it came to be thought of as loess produced in deserts. This led to some controversy as no mechanism for producing silt particles in deserts was readily available. Bruce Butler in Australia in particular cast doubt on the existence of desert-made loess. Butler indicated loess-like deposits in Australia which he called Parna; these are very like loess but the silt sized particles are actually clay mineral agglomerates of silt size- formed in dry lake regions. At the heart of the desert loess discussion is the problem of producing loess material in deserts. It has been suggested that there are no realistic mechanisms for forming large amounts of loess dust but there is a possibility that sand grain impact may produce particle shattering and lead to the formation of quartz silt. This would appear to be a reasonable mechanism for the African deposits of desert loess, but possibly inadequate for the huge deposits in China and Central Asia. The desert loess in China and Central Asia is loess associated with a desert. The material is formed in cold, high country and carried by rivers to the vicinity of deserts. It progresses then from deserts to loess deposit. Adobe ground may be defined as desert loess. Adobe occurs on the fringe of deserts, notably in the Sahelian region of Africa, and in SW USA. The use of adobe in construction represents the major utilization of desert loess in a social context. More understanding of adobe is required, in particular with respect to the adobe reaction, the low order chemical reaction which provides modest cementitious properties, and can be likened to the pozzolanic reactions in hydrating cement systems. The location of loess and loess-like ground on the peripheries of deserts is aided by the observation of the nesting sites of bee-eater birds. These birds have a determined preference for loess ground to dig their nesting tunnels; the presence of nest tunnels suggests the occurrence of desert loess, in desert fringe regions. We seek amalgamation and contrast: ten main topics are considered: words and terms, particles, parna, geotechnical, adobe, people, birds, Africa, Central Asia, Mars. The aim is some large generalizations which will benefit all aspects of desert loess investigation.
Źródło:
Geologos; 2019, 25, 1; 91-102
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of randomly oriented fibres on shear strength of mineral soils
Autorzy:
Zydroń, T.
Gruchot, A.
Konat, P.
Powiązania:
https://bibliotekanauki.pl/articles/971477.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
shear strength
fibre reinforcement
reinforced sand
reinforced clayey silt
Opis:
The purpose of the paper was to determine two things: the influence of type and amount of reinforcement on shear strength of soil and the relation between the efficiency of reinforcement and soil moisture content. Shear strength was determined in a direct shear apparatus in a box with a square section of 80x80 mm. The range of normal stress was from 25 to 150 kPa and the shear velocity was 1.0 mm×min⁻¹. The tests were carried out on medium sand and clayey coarse silt at two moisture contents and with two types of reinforcement - polyolefine fibres and 40x3 mm foil stripes. The addition of reinforcement was 0.5 and 1.0% in relation to the dry mass of soil. Test results indicated that using polyolefine fibres as dispersed reinforcement in a sandy soil increased its shear strength. Whereas the influence of using foil stripes on shear strength was little. However, using both types of reinforcement in a cohesive soil increased its shear strength and this influence was particularly clear at higher moisture content.
Źródło:
Polish Journal of Soil Science; 2019, 52, 2; 235-246
0079-2985
Pojawia się w:
Polish Journal of Soil Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geofizyczne rozpoznanie zasięgu kry jurajskiej w Gołaszynie k. Łukowa
Geophysical investigation of spatial distribution of the Jurassic raft in Gołaszyn near Łuków, E Poland
Autorzy:
Mendecki, M.
Świder, M.
Nowaczyńska, I.
Mamak, A.
Odrobińska, J.
Piotrowska, P.
Rewers, J.
Tymińska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2075797.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
kra jurajska
czarny muł
rezystywność elektryczna
Łuków
Gołaszyn
rezerwat przyrody
Jurassic raft
black silt
electrical resistivity imaging
Kra Jurajska nature reserve
Opis:
The paper deals with the study of the Middle Jurassic clays near the town of Łuków, to identify its position, depth and thickness defined using geoelectrical techniques. The electrical properties of the ground were determined by a non-invasive 2D Resistivity Imaging Method which involves the investigation of the distribution of resistivity in the ground in X and Z direction. The measurements were carried out on four survey profiles that allowed to distinguish the horizontal and vertical extent of the Jurassic raft. It is not regular, but represents a more complicated structure. The values of resistivity, identified with the Jurassic clays, were very low and reached about 1-20 Q,m, which allowed interpreting, on each resistivity cross-section, its thickness changing from a few metres up to tens of metres.
Źródło:
Przegląd Geologiczny; 2018, 66, 1; 48--54
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of soil fabrics and stress state on the undrained instability of overconsolidated binary granular assemblies
Autorzy:
Mahmoudi, Y.
Taiba, A. C.
Hazout, L.
Baille, W.
Belkhatir, M.
Powiązania:
https://bibliotekanauki.pl/articles/178902.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
instability line
dry funnel pluviation
wet deposition
overconsolidation ratio
sand-silt mixtures
Opis:
The instability of saturated granular soils in field conditions generates drastic collapse in terms of runoff deformation because of its failing to sustain naturally applied loading conditions such as earthquakes, wave actions and vibrations. The objective of this laboratory investigation is to study the effects of the depositional methods, overconsolidation ratio (OCR) and confining pressure on the undrained instability shear strength of medium dense (Dr = 52%) sand-silt mixtures under static loading conditions. For this purpose, a series of undrained monotonic triaxial tests were carried out on reconstituted saturated silty sand samples with fines content ranging from 0% to 40%. Three confining pressures were used (P’c = 100, 200 and 300 kPa) in this research. The sand-silt mixture samples were prepared using two depositional methods, dry funnel pluviation (DFP) and wet deposition (WD), and subjected to two OCRs (1 and 2). The obtained instability lines and friction angles indicate that the funnel pluviated samples exhibit strain hardening compared to the wet deposited samples and that normally consolidated and overconsolidated wet deposited clean sandy samples were very sensitive to static liquefaction. The test results also indicate that the instability friction angle increases with the increase in the OCR expressing soil dilative character tendency increase. The instability friction angle decreases with the increase in the fines content for DFP and the inverse tendency was observed in the case of WD.
Źródło:
Studia Geotechnica et Mechanica; 2018, 40, 2; 96-116
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wydzielanie i charakterystyka frakcji pylastej (silt) w skałach mułowcowych zapadliska przedkarpackiego
Separation and characterization of the silt fraction in the mudstone rocks of the Carpathian Foredeep
Autorzy:
Łykowska, G.
Klaja, J.
Przelaskowska, A.
Zagórska, U.
Powiązania:
https://bibliotekanauki.pl/articles/1835264.pdf
Data publikacji:
2018
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
silt
frakcja pylasta
metody rozdrabniania skał
silt fraction
methods of fragmentation rocks
Opis:
Skały mułowcowe, pomimo że zawierają znacznie mniej minerałów ilastych niż iłowce, to na krzywych otworowych mają podobnypoziom radioaktywności, co istotnie utrudnia wydzielenie ich z analizowanego profilu litologicznego. Celem przedstawionych badań jest opracowanie metodyki pozwalającej na wydzielenie, charakterystykę i oszacowanie ilościowego udziału frakcji pylastej (silt) w skałach mułowcowych. Przetestowane zostały różne laboratoryjne metody rozdrabniania skał (kruszenie, zamrażanie, nasycanie solą glauberską) tak, aby uniknąć sztucznego utworzenia dodatkowego siltu (np. przez zbytnie rozkruszenie skały), jak i zaniżenia jego ilości (przez niedostateczne rozdrobnienie skały). Poszczególne frakcje ziarnowe zostały wydzielone w rozdrobnionym materiale skalnym metodą sitową (frakcja piaszczysta) oraz metodą wirowania (frakcja pylasta, frakcja ilasta). Następnie przeprowadzono dokładną charakterystykę mineralogiczną i petrofizyczną oraz dokonano oceny ilościowej wydzielonej frakcji pylastej. Wydzielenie frakcji pylastej badanych skał i uwzględnienie jej w modelach interpretacyjnych umożliwia rozróżnienie mułowców i iłowców w profilach otworów wiertnicznych zapadliska przedkarpackiego.
Mudstones, although they contain significantly less clay minerals than claystones, they exhibit similar levels of radioactivity on the well logs, which significantly impedes their distinction in the analyzed lithological profile. The aim of the study was to develop a methodology for separating, characterizing, and estimating the amount of silt fraction in mudstone rocks. Various laboratory methods of fragmentation (crushing, freezing, saturation with Glauber’s salt) have been tested to avoid both creating additional silt artificially (e.g. by over-crushing the rock), and underestimating of its amount (by insufficient fragmentation of rocks). The individual grain fractions were separated in the crushed rock material by the sieve (sand fraction) and centrifugation methods (silt fraction, clay fraction). Subsequently the detailed mineralogical and petrophysical characteristics and quantitative evaluation of the silt fraction were carried out. The separation of the silt fraction in the examined rock and its inclusion in the interpretation models will allow to distinguish between mudstones and claystones in the profiles of the Carpathian Foredeep boreholes.
Źródło:
Nafta-Gaz; 2018, 74, 4; 259-269
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geotechniczne uwarunkowania posadowienia obiektów budowlanych na terenie Rzeszowa
Geotechnical conditions for buildings foundations in the Rzeszow area
Autorzy:
Wilk, K.
Powiązania:
https://bibliotekanauki.pl/articles/105177.pdf
Data publikacji:
2017
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
podłoże gruntowe
warunki gruntowo-wodne
Podgórze Rzeszowskie
Pradolina Podkarpacka
pyły lessopodobne
grunty madowe
zagrożenia geotechniczne
subsoil
groundwater conditions
Rzeszow submountain region
Podkarpacie icemarginal valley
loess similar silt
fen soil
earths
geotechnical hazards
Opis:
W artykule opisane zostały główne formy morfologiczne występujące na terenie Rzeszowa, tj. Pogórze Dynowskie, Podgórze Rzeszowskie oraz Pradolinę Podkarpacką. Wskazano na różnice w budowie podłoża gruntowego na każdym z tych obszarów. Opisane zostały również warunki hydrologiczne na terenie miasta oraz ich zmiany na przestrzeni czasu, mające wpływ na geotechniczne warunki posadowienia obiektów. W pracy przedstawiono naturalne zagrożenia wynikające ze specyficznej budowy podłoża gruntowego, cechującej się swego rodzaju regionalizmem. Lokalne czynniki warunkujące właściwości geotechniczne gruntu powinny być uwzględnione na etapie rozpoznania podłoża na cele budowlane.
The paper describes the main morphological forms occurring in the Rzeszów area, i.e. the Dynow foothills, Rzeszow submunition region and Podkarpacie ice-marginal valley. The differences in the structure of subsoil in each of these areas were indicated. The hydrological conditions in the city and their changes over time were described. These have influenced on the geotechnical conditions of the building foundations. The paper presents the natural hazards arising from the specific structure of the subsoil, which is characterized by a specific kind of regionalism. Local factors determining the geotechnical properties of the soil should be taken into account at the stage of recognition of the substrate for construction purposes.
Źródło:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury; 2017, 64, 3/II; 419-428
2300-5130
2300-8903
Pojawia się w:
Czasopismo Inżynierii Lądowej, Środowiska i Architektury
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Holocene Lake sediments as a source of building material in ancient egypt; archeometric evidence from Wadi Tumilat (Nile Delta)
Autorzy:
Welc, Fabian
Zaremba, Małgorzata
Trzciński, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2026014.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
clay-silt-sand-gravel
mud bricks
fortress walls
open-pit mine
climate changes
Opis:
The Tell el-Retaba archaeological site is located in the middle part of Wadi Tumilat, which extends along the north-eastern margin of the Nile Delta. It contains fragments of fortified and domestic objects of the ancient fortress and other constructions built of mud bricks. The establishment and functioning of the fortress is dated at the times of the reign of two great pharaohs, Ramesses II and Ramesses III (13th and 12th centuries BC). The grain size composition of the sediments used for mud brick production had significant influence on their physical and mechanical properties, which was used by the ancient Egyptians for the improvement of bricks. The finest fractions, clay and silt, which generally comprise clay minerals and organic matter played a significant role. These components significantly influenced the mud brick properties and resulted in a structural cohesion of the material. The second important component of mud bricks were coarse fractions – sand and gravel. The source of material used for brick production were the natural sediments located in the vicinity of the fortress, i.e. the Holocene lake clay and the Pleistocene gravel and sand of the gezira formation, deposited by a braided river. Clay sediments have a variable lithology as can be deduced from grain size composition of mud bricks and their properties. This variability was caused by a variable regime of the Nile, which supplied material to the lake basin. Geological studies were used to recognize ancient environment and morphology of the area, and to find clay, sand and gravel open-pits that existed in the area. The fortress site was selected optimally in relation to the landscape morphology and close vicinity of the source of basic material and water used for mud brick production. The area around the fortress was substantially transformed by humans due to settlement.
Źródło:
Studia Quaternaria; 2017, 34; 109-118
1641-5558
2300-0384
Pojawia się w:
Studia Quaternaria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of a Used Stabiliser on the California Bearing Ratio of the Clayey-Sandy Silt
Autorzy:
Kamińska, K.
Cholewa, M.
Moskwik, K.
Powiązania:
https://bibliotekanauki.pl/articles/952365.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
stabiliser
California Bearing Ratio
clayey-sandy silt
Opis:
The paper aimed at the determination of the California Bearing Ratio of a stabilised and unstabilised fine-grained mineral soil. A clayey-sandy silt with the addition of 3, 6 and 10% of road stabilisers Solidex and Solidex A was used for the tests. The tests were carried out in the press Tritech 50 at the loading of 22 and 44 N. The stabilised samples were subjected to 7-days treatment, whereas unstabilised 4-days treatment. Stabilization with the applied road binders brought positive effects, there occurred a significant improvement in the mechanical properties of the clayey-sandy silt. The better binder, which significantly increased the value of the CBR ratio, was Solidex A. The use of hydraulic binders is of a great importance in road building, because their addition improves the mechanical properties of weaker mineral soils.
Źródło:
Journal of Ecological Engineering; 2017, 18, 1; 154-158
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oedometer tests of soft soil and attempt of their numerical simulation
Badania edometryczne gruntów słabych i próba ich numerycznego odwzorowania
Autorzy:
Juszkiewicz, P.
Szypulski, P.
Międlarz, K.
Powiązania:
https://bibliotekanauki.pl/articles/111412.pdf
Data publikacji:
2017
Wydawca:
Instytut Morski w Gdańsku
Tematy:
edometer
soft soil
Plaxis
finite element method
test
compressibility
calibration
organic soil
silt
adjustment
edometr
grunty słabe
Metoda Elementów Skończonych
ściśliwość
kalibracja
grunt organiczny
pył
dopasowanie
Opis:
For the purpose of this article, oedometer tests were performed on organic silt samples derived from the bottom of an excavation made near the Dead Vistula River. Three independent oedometer tests, with required basic tests for them, were carried out on specimens made from the same sample. Based on the test results, compressibility characteristic, physical and strength parameters of organic silt were determined. Using finite element method, attempts of simulation oedometer tests and calibration of compression parameters were made.
Dla potrzeb niniejszego artykułu przeprowadzono badania edometryczne na próbkach gruntu pyłu organicznego pochodzących z dna wykopu wykonanego niedaleko Martwej Wisły. Wykonano trzy niezależne badania edometryczne na próbkach z tego samego bloku gruntowego wraz z badaniami towarzyszącymi. Na podstawie wyników badań wyznaczono cechy fizyczne, charakterystykę ściśliwości oraz parametry wytrzymałościowe pyłu organicznego. Dokonano próby symulacji badań edometrycznych z wykorzystaniem Metody Elementów Skończonych oraz przeprowadzono kalibrację parametrów ściśliwości badanego gruntu.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2017, 32, 1; 46-49
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zharmonizowanie klasyfikacji gruntów spoistych według norm PN-EN ISO 14688:2006 i PN-86/B-02480
Harmonizing classifications of cohesive soils according to PN-EN ISO 14688:2006 and PN-86/B-02480 standards
Autorzy:
Tarnawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075728.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
grunty spoiste
grunty drobnoziarniste
frakcja główna
frakcje pomocnicze
glina
muł
piasek
klasyfikacja
cohesive soils
fine grained soils
main fraction
secondary fractions
clay
silt
sand
classification
Opis:
This article discusses the differences between the classification of cohesive soils according to the obsolete PN-86/B-02480 Polish standard and to the applicable PN-EN ISO 14688:2006 standard. Differences in the ways of recognizing and classifying these soils according to these standards are debated in the scientific and professional world, and due to the different approach to their nomenclature they seem difficult to overcome. The author analyzes these Polish research methods, which are closest to the macroscopic analysis required by PN-EN ISO 14688:2006, and then points to the real possibility of harmonizing both classifications.
Źródło:
Przegląd Geologiczny; 2017, 65, 10/2; 701--706
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ ciężaru warstw konstrukcyjnych nawierzchni na wartosc wskaźnika nośności CBR
Influence of surface layers of engineering for evaluation of the capacity CBR
Autorzy:
Chmielewski, R.
Waliszewski, D.
Powiązania:
https://bibliotekanauki.pl/articles/40441.pdf
Data publikacji:
2016
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
nawierzchnie drogowe
podloza gruntowe
nosnosc
kalifornijski wskaznik nosnosci
metoda CBR
frakcje pylaste
road surface
subsoil
bearing capacity
California Bearing Ratio
silt fraction
Opis:
W artykule przedstawiono zagadnienie dotyczące badania wskaźnika nośności podłoża (CBR) dla gruntów wątpliwych. W obecnej praktyce inżynierskiej, pomimo zapisów rozporządzenia dotyczącego warunków technicznych dla dróg samochodowych, laboratoryjne badania CBR gruntów rodzimych są rzadko wykonywane. Oznaczenia wskaźnika CBR wykonano dla różnych poziomów naprężeń od warstw konstrukcyjnych oraz gruntów z różną zawartością frakcji pylastych. Uzyskane wyniki badań skorelowano z obciążeniami warstw konstrukcyjnych nawierzchni zgodnie z nowym katalogiem nawierzchni podatnych i półsztywnych. Ponadto przedstawiono zależności między wskaźnikiem CBR a zawartością frakcji pylastych.
The paper presents the issue concerning the examination of the load index CBR ground for questionable land. In accordance with applicable regulations in the case of soft soil should always be done CBR study, regardless of the water - groundwater. In the current engineering practice, despite the Regulation on the technical conditions for highways, laboratory tests CBR native land are rarely performed. Markings index CBR made for different levels of the stress of the primary structural layers and land with different fractions of silt. The obtained results were correlated with the burden of the weight of structural layers of pavement in accordance with the new catalog of flexible pavements and semi-rigid. In addition, it shows the relationship between an indicator of the CBR and the content of silt fraction.
Źródło:
Acta Scientiarum Polonorum. Architectura; 2016, 15, 2
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ uwarunkowań geośrodowiskowych i antropogenicznych na obecność historycznych zanieczyszczeń w podłożu klasztoru ss. Bernardynek w Krakowie
Geoenvironmental and anthropogenic conditions and their impact on the presence of historical pollution in the substrate of the monastery of Bernardine Sisters in Krakow
Autorzy:
Wardas-Lasoń, M.
Powiązania:
https://bibliotekanauki.pl/articles/2075562.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
zanieczyszczenie podłoża
historyczne zanieczyszczenie
warunki geośrodowiskowe
fosa
muł
warstwy archeologiczne
Kraków
historical pollution
geoenvironmental conditions
moat
silt
archaeological layers
Opis:
The substrate in the area of the monastery of Bernardine Sisters was analyzed based on 7 small-diameter profiled mechanical holes drilled in order to determine the structure and lithology of the area and archaeological stratigraphic sequence. Based on this research, a system of archaeological strata and the presence of objects such as wall remains, and especially the relicts of the medieval drainage ditch “moat”, was established. It was assessed whether the geoenvironmental conditions are conducive to pollution occurrence and accumulation. Its major source was the Municipal Great Scales on the Main Market Square of Kraków, which functioned in the Middle Ages. To verify this thesis the indexes of sediment coming from the historical “moat” were determined (pH, Eh, EC, LOI). Similar studies were carried out to the level of “calec” for the substrate of the Monastery, erected in its vicinity. In the lithologically recognized and archaeologically interpreted layers of earth, heavy metals content was determined to distinguish anthropogenic factors and geoenvironmental conditions of the contaminants. The pollution assessment was made on the basis of a comparative analysis of the land quality, especially in the areas of silt occurrence, also in relation to the current environmental standards.
Źródło:
Przegląd Geologiczny; 2016, 64, 4; 262--274
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies