Temat: rozkład wielkości ziarna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Investigations of Properties of Soil-Aggregate Mixtures
Autorzy:: Skrzypczak, Izabela
Powiązania:: https://bibliotekanauki.pl/articles/27314805.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: soil-aggregate mixture
strength parameters
grain-size distribution
optimal moisture
mieszanka glebowo-kruszywowa
parametry wytrzymałościowe
rozkład wielkości ziarna
wilgotność optymalna
Opis:: The subject of this paper is the evaluation of the use of waste material, which is the native soil. On the example of the base ground taken from the village of Lipie (Podkarpackie voivodeship), soil-aggregate mixtures were prepared with a different degree of addition of natural aggregate. The study analysed the quantitative and qualitative parameters of the prepared mixtures and assessed their physical and mechanical properties to determine their suitability for the construction of infrastructural facilities. It should be noted that most specifications recommend the use of primarily aggregate mixtures. The paper presents the results of a study analysing the effect of aggregate admixture to the native soil on selected physical and strength properties of the mixtures developed. The obtained results confirmed the validity of research on the use of soil-aggregate mixtures for construction purposes.
Źródło:: Civil and Environmental Engineering Reports; 2022, 32, 3; 116--132
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Textural characteristics, mode of transportation and depositional environment of the Stormberg Group in the Eastern Cape, South Africa: evidence from grain size and lithofacies analyses
Autorzy:: Chima, Priscilla
Baiyegunhi, Christopher
Powiązania:: https://bibliotekanauki.pl/articles/2204351.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: grain size distribution
textural parameters
lithofacies classification
hydrodynamic energy conditions
Triassic
Jurassic
rozkład wielkości ziarna
parametry teksturalne
klasyfikacja litofacji
warunki hydrodynamiczne
warunki energetyczne
trias
jura
Opis:: The Stormberg Group comprises the Molteno, Elliot and Clarens formations and is one of four stratigraphical groups that make up the Karoo Supergroup in South Africa. The group is the highest unit in the Karoo Basin, representing the final phase of preserved sedimentation. The major problem with the Stromberg Group is that the mode of transport, hydrodynamic energy conditions and depositional environment are still poorly understood. For the present paper, grain size and lithofacies studies on selected sandstones from the Molteno, Elliot and Clarens formations were performed so as to elucidate their textural characteristics, depositional processes, sedimentation mechanisms and hydrodynamic energy conditions and to discriminate different depositional environments. The statistical parameters of grain size distribution (mean grain size, standard deviation, skewness and kurtosis) show that the sandstones are predominantly unimodal, fine grained, moderately well sorted, mesokurtic and near symmetrical. The bivariate diagrams of the aforementioned statistical parameters demonstrate that river and aeolian dune had the greatest impact on the depositional environments. Likewise, the C-M pattern (Passega diagram) shows that the sandstones were mostly deposited through tractive current process. Furthermore, the C-M diagram reveals the prevalence of rolling, suspension and graded suspension modes of sediment transportation. Seventeen sedimentary lithofacies were identified and grouped into seven lithofacies associations. These lithofacies associations indicate braided channel, overbank and swamp deposits for the Molteno Formation, alluvial fan/floodplain and playa deposits for the Elliot Formation and aeolian deposits for the Clarens Formation.
Źródło:: Geologos; 2022, 28, 1; 61--78
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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