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ASTM D4525-13e2
Standard Test Method for Permeability of Rocks by Flowing Air (Withdrawn 2022) (Includes all amendments And changes 1/14/2022).
NORMA vydaná dňa 1.11.2013
Informácie o norme:
Označenie normy: ASTM D4525-13e2
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.11.2013
Kód tovaru: NS-844649
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Kategórie - podobné normy:
Zemní práce. Hloubicí práce. Budování základů. Podzemní práce
Anotácia textu normy ASTM D4525-13e2 :
Keywords:
air flow, flow, flow rate, permeability, rock,, ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works)
Doplňujúce informácie
| Significance and Use | ||||||||
|
5.1 This test method is designed to measure the permeability to air of a small sample of rock. By extrapolation, this test method also determines an equivalent of the liquid permeability. This parameter is used to calculate the flow through rock of fluids subjected to a pressure differential. 1.1 This test method covers the
determination of the coefficient of specific permeability for the
flow of air through rocks. The method establishes representative
values of the coefficient of permeability of rocks or
well-indurated soils.
1.2 This test method is limited to permeability values greater than 9.869 × 10-18 m2 (0.01 millidarcy), and is limited to rocks free of oil or unctuous matter. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.4 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026. 1.4.1 The procedures used to specify how data are collected/recorded or calculated, in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analytical methods for engineering design. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||
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