Soil Permeability Apparatus

Soil Permeability Apparatus is used for the laboratory determination of permeability of soils using a constant or a variable head. This test is recommended for soils with coefficient of permeability in the range of 10^-3 to 10^-7 cm/sec. The maximum particle size of the soil which can be tested in the mould is 10 mm.

Standard: IS: 2720 (Part XBII), ASTM D 2434.

The equipment comprises one each:  

• Gun metal mould, 100 mm I.D x 127.3 mm high x 1000 ml volume.
• Extension collar, 100 mm dia x 60 mm high for the above mould.
• Drainage base plate with a recess for a porous stone and with an outlet valve.
• Metallic clamping ring.
• Drainage cap (Top plate with a recess for a porous stone and fitted with an inlet valve and an air release valve.)
• Dummy plate to serve as a false bottom during compaction.
• Porous stone for drainage cap.
• Porous stone for base plate.
• Set of Three glass stand pipes approximately 6 mm dia., 10 mm dia and 20 mm dia mounted on a wooden board. Each glass tube is longer than 1 meter and has a serrested end at the bottom.
• To read water head 2 Nos. meter scales are fixed between the tubes. 
•  A length of 3 meter long rubber tubing with pinch cock is also supplied.