Permeability Apparatus
BS EN ISO 17892-11 | AASHTO T215 | BS 1377:5 | ASTM D2434-06 | ASTM D5856
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Constant Head Permeability Apparatus
This method describes a procedure for the determination of the permeability of water through granular (cohesionless) soils in a steady-state condition. The procedure is to establish representative values of the coefficient of permeability, k, of granular soils that may occur in natural deposits as placed in embankments, or when used as base courses under pavements. The determination of k was developed under the assumptions of the validity of Darcy’s Law, which states that the coefficient of permeability is the ratio of the flow rate to the hydraulic gradient. In order to limit consolidation influences during testing, this procedure is limited to disturbed granular soils with permeability in range of 1 to 1x10-5. 38-T0184/KIT1: Constant Head Apparatus The whole system includes: - Constant head permeability cell, 75mm dia. - Manometer stand with 3 manometer tubes 6mm dia. with ruler 1152x250x34 mm - Constant level tank assembled on height adjustable panel. Complete with inlet, outlet, overflow, connecting tubing for the cell. 38-T0184/C1: Constant head permeability cell, 75 mm internal dia., 3 take-off points 38-T0184/C2: Constant head permeability cell, 114 mm internal dia., 6+6 (blanked) take-off points 38-T0184/T: Constant head tank, complete with inlet, outlet, overflow, connecting tubing for the cell 38-T0183/MS: Manometer stand with 4 tubes positioning. Tubes, ruler and anchoring system has to be ordered separately. Dimensions: 1152 x 250 x 34 mm 38-T0183/R: Ruler for T0183/MS 38-T0183/6: Manometer tube 6 mm dia. Connecting valve has to be ordered separately (38-T0183/6C) 38-T0183/8: Manometer tube 8 mm dia. Connecting valve has to be ordered separately (38-T0183/8C) 38-T0183/14: Manometer tube 14 mm dia. Connecting valve has to be ordered separately (38-T0183/14C) 38-T0183/22: Manometer tube 22 mm dia. Connecting valve has to be ordered separately (38-T0183/22C) 38-T0183/A: Anchoring system to fix manometer tubes with connecting valves on the manometer stand 38-T0183/P: Control Panel used for sample saturation |
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Falling Head Permeability Apparatus
The falling head permeability test is used to determine the permeability of fine grained soils with intermediate and low permeability such as silts and clays with permeability in range of 1x10-5 to 1x10-9. This testing method can be applied to an undisturbed sample. The falling head principle can be applied to an undisturbed sample in a sampling tube and to a sample in an oedometer consolidation cell. This test method covers laboratory measurement of the hydraulic conductivity of laboratory-compacted materials with a rigid-wall, compaction-mold permeameter and may be used with compacted specimens that have a hydraulic conductivity less than or equal to 1 × 10−5 m/s. 38-T0185/KIT1: Falling Head Apparatus The whole system includes: - Falling head permeability cell, 100 mm internal dia. - Manometer stand with 3 tubes 6,8,14 mm dia. with quick couplings and anchoring system 1152x250x34 mm - Soaking reservoir, complete with overflow tube 38-T0185/KIT2: Falling head apparatus for compacted soil The whole system includes: - Compaction mould permeameter, 4" (101.6mm) dia. conforming to ASTM D5856 - Manometer stand with 3 tubes 6, 8, 14 mm dia. with connecting valves and anchoring system 1152x250x34 mm 28-WF4220/A: De-airing tank, 7 liters capacity 28-WF4221/A: De-airing tank, 23 liters capacity 86-D2001: Portable vacuum pump, free air displacement 75 l/min, ultimate vacuum 0.1 mbar. 230V/50-60Hz/1Ph 86-D2005: Air drying unit for use with silica gel with the indicator 86-D0819 86-D0819: Silica gel 1 kg 86-D2064: Rubber tube dia 6.5 x 16.5 mm, 2 m long, for vacuum pump 38-T0185/C1: Falling head permeability cell, 100 mm internal dia. complete with 75 micron gauze and 2 m of tubing conforming to BS EN ISO 17892-11 38-T0185/C2: Compaction mould permeameter, 4" (101,6 mm) dia. conforming to ASTM D5856 38-T0185/C3: Compaction mould permeameter, 6" (152,4 mm) dia. conforming to ASTM D5856 38-T0185/T: Soaking reservoir, complete with overflow tube 
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