Standard Test Method for Saturated Water Permeability of Granular Drainage Media [Falling-Head Method] for Vegetative (Green) Roof Systems

Importancia y uso:

5.1 This test method addresses performance characteristics for vegetative (green) roof systems with respect to the water permeability of the drainage media.

5.1.1 Water permeability of coarse materials is highly influenced by the head conditions under which it is measured. In vegetative (green) roofs, coarse materials are frequently used to create drainage zones for percolated rainfall.

5.1.2 This test method is intended to provide water permeability data that is relevant to this design condition that is characterized by horizontal flow under low-head. This will also allow the performance of granular drainage layers in vegetative (green) roof systems to be compared directly to alternative components, such as geocomposite drain layers.

5.2 Determining the performance characteristics of vegetative (green) roof systems provides information to facilitate the assessment of related engineering aspects of the facility. Such aspects may include structural design requirements, mechanical engineering and thermal design requirements, and fire and life safety requirements.

5.3 Determining the performance characteristics of vegetative (green) roof systems provides information to facilitate assessment of the performance of one vegetative (green) roof system relative to another.

Subcomité:

D08.24

Referida por:

E2397_E2397M-19, E2777-20

Volúmen:

04.04

Número ICS:

65.020.20 (Plant growing), 91.060.20 (Roofs)

Palabras clave:

granular, coarse aggregate; low-head; vegetative (green) roof; water permeability;