ASTM F1815-11(2026)

Podrobné informácie

Označenie: ASTM F1815-11(2026)

Dátum vydania: 01.03.2026

Stránok: 6

Krajina: Americká technická norma

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Anotácia

These test methods cover the standard procedures and related calculations for determining the saturated hydraulic conductivity, water retention, porosity, and bulk density of sand-based root zone mixtures used in the construction and topdressing of golf course putting greens including United States Golf Association (USGA) recommended greens, golf course tees, sand-based sports fields, and other highly trafficked turfgrass areas. These test methods are not designed for use with fine or medium textured soils such as sandy loams and loams. Test Method A is used to determine the saturated hydraulic conductivity by maintaining water flow through the core at a constant hydraulic head until a steady flow rate is achieved, at which time aliquots of the outflow are collected. Test Method B, on the other hand, is used to determine water retention and bulk density. Water retention is obtained at a soil suction, wherein water is extracted from a prepared core by means of a tension table or other water extraction apparatus. And when equilibrium is achieved after the core has been oven dried, the weight is recorded. Bulk density is, then, calculated from the mix or sand dry weight and volume. Test Method C is used to calculate the total porosity from the bulk density and particle density. And lastly, Test Method D is used to calculate the capillary and air-filled porosities. Capillary porosity is calculated from the bulk density and water retention information, while, the air-filled or aeration porosity is calculated from the difference of the total and capillary porosities.


Keywords:
aeration porosity, bulk density, capillary porosity, particle density, physical properties, pore distribution, porosity, putting green, saturated hydraulic conductivity, sports field, soils, turfgrass, water retention,, ICS Number Code 97.220.10 (Sports facilities)