ISO 17312:2005 pdf download.Soil quality - Determination of hydraulic conductivity of saturated porous materials using a rigid-wall permeameter.
Using one of the following prociedures, place the prepared soil in uniform thin layers approximately equal in thiclness after compaction to the maximum particle size, but not less than approximately 15 mm.
a) For soils having a maximum particle size of 9.5 mm or less, place the appropriate size funnel, as specified in 4.3. in the hydraulic conductivity device with the spout in contact with the lower porous plate or screen, or Previously formed layer. and fill the funnel with sufficient soil to form a layer, taking soil from different areas of the sample in the pan. Lift the tunnel by 15 mm, oi’ approximately thickness of the unconsolidated layer to be formed, and spread the soil with a slow spiral motion, working from the perimeter of the device toward the centre, so that a uniform layer is formed. Remix the soil in the pan for each successive layer to reduce segregation caused by taking soil from the pan.
b) For soils having a maximum particle size greater than 9,5 mm, spread the soil from a scoop. Uniform spreading can be obtained by sliding a scoopful of sd in a nearly horizontal position down along the inside surface of the device to the bottcxn or to the formed layer, then tilting the scoop and drawrng it toward the centre with a single slow motion; this allows the sod to run smoothly from the scoop in a windrow without segregation. Turn the hydraulic conductivity cylinder sufficiently for the next scoopful, thus progressing around the inside perimeter to form a uniform compacted layer of a thickness equal to the maxinum particle size.
a) For soils having a maximum particle size of 9.5 mm or less, place the appropriate size funnel, as specified in 4.3. in the hydraulic conductivity device with the spout in contact with the lower porous plate or screen, or Previously formed layer. and fill the funnel with sufficient soil to form a layer, taking soil from different areas of the sample in the pan. Lift the tunnel by 15 mm, oi’ approximately thickness of the unconsolidated layer to be formed, and spread the soil with a slow spiral motion, working from the perimeter of the device toward the centre, so that a uniform layer is formed. Remix the soil in the pan for each successive layer to reduce segregation caused by taking soil from the pan.
b) For soils having a maximum particle size greater than 9,5 mm, spread the soil from a scoop. Uniform spreading can be obtained by sliding a scoopful of sd in a nearly horizontal position down along the inside surface of the device to the bottcxn or to the formed layer, then tilting the scoop and drawrng it toward the centre with a single slow motion; this allows the sod to run smoothly from the scoop in a windrow without segregation. Turn the hydraulic conductivity cylinder sufficiently for the next scoopful, thus progressing around the inside perimeter to form a uniform compacted layer of a thickness equal to the maxinum particle size.
