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Standard ČSN EN ISO 17892-4 1.11.2017 preview

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ČSN EN ISO 17892-4 (721007)

Geotechnical investigation and testing - Laboratory testing of soil - Part 4: Determination of particle size distribution

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STANDARD published on 1.11.2017


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The information about the standard:

Designation standards: ČSN EN ISO 17892-4
Classification mark: 721007
Catalog number: 503457
Publication date standards: 1.11.2017
SKU: NS-799578
The number of pages: 36
Approximate weight : 108 g (0.24 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Physical properties of soilsEarthworks. Excavations. Foundation construction. Underground works

Annotation of standard text ČSN EN ISO 17892-4 (721007):

Tato část ISO 17892 určuje metodu pro stanovení zrnitosti zemin. Tato část ISO 17892 popisuje laboratorní stanovení zrnitosti zemin zkušebního vzorku proséváním nebo sedimentací nebo kombinací těchto metod v rámci rozsahu geotechnických průzkumů. Zrnitost je jedna z nejdůležitějších fyzikálních vlastností zeminy. Klasifikace zemin je založena především na zrnitosti. K zrnitosti se vztahuje řada geotechnických a hydrogeologických vlastností zeminy. Zrnitost poskytuje popis zeminy založený na rozdělení zrn zeminy do jednotlivých frakcí. Zastoupení každé frakce v zemině může být stanoveno proséváním a/nebo sedimentací. Zrnitost hrubozrnných zemin se obvykle stanovuje proséváním, zrnitost jemnozrnných a smíšených zemin se obvykle stanovuje kombinací prosévání a sedimentace v závislosti na složení zeminy. Metoda prosévání je využitelná pro všechny nezpevněné zeminy s velikostí zrn menší než 125 mm. Popsány jsou dvě sedimentační metody: hustoměrný rozbor a pipetovací metoda. POZNÁMKA: Tato část ISO 17892 je v souladu s požadavky na stanovení zrnitosti zemin podle EN 1997-2

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