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Soil Testing Equipment

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Permeability Apparatus
In soil machines Permeability is one of the important Engineering properties, as it governs rate of settlement of saturated compressible soil layer and rate of flow of equifer. Permeability is that property of soil which permits flow of water through its interconnecting voids. The instrument to measure permeability is called permeameter. The results are used for pumping groung water, for foundation sites excavations, design of dams etc. Tests can be performed on remoulded or undisturbed samples using constant head or falling head method.

Soil Permeability Apparatus
The 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 co-efficient of permeability in the range of 10 x -3 to 10 x -7cm/sec. The maximum particle size of the soil which can be tested in the mould is 10 mm.
Salient Features
  • Specifications : The equipment comprises one each: Gun metal mould, 100mm I.D. x 127 mm high x 1000 ml volume. Gun metal mould extension collar, 100 mm dia x 60 mm high for the above mould.
    Gun metal Drainage base plate with a recess for a porous stone and with an outlet valve.
    Metallic clamping ring.
    Gun metal drainage cap (top plate with a recess for a porous stone and fitted with an inlet valve and an air release valve.) Gun metal dummy plate to serve as a false bottom during compaction. Porous stone for drainage cap. Porous stone for base plate. Set of 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.

Universal Or Combination Permeameter
  • Specifications : Same as above but instead of a set of three glass stand pipes a stand with nine glass tubes of 6mm, 10mm, 20mm, 25mm, 40mm, 50mm, 60mm, 70mm, 75mm bore. 75mm bore tube is provided with overflow arrangement for constant head tests. The remaining tubes are used for falling head test.
Salient Features
  • Optional : Overhead tank made of steel, approximately 37.5cm dia x 1mtr. high. it is provided with an inlet port at the top and size outlet at bottom with cocks and air inlet and water filling tube on top. An arrangement is provided to indicate the water level. An extra meralic tube having approximately 5mm /6mm I.D. and 1 mtr. long is also supplied 2.6 kg x 310 mm controlled fall and Rammer 4.89 kg x 450 mm controlled fall.
  • Spares : Pair of top and bottom Porous stones for permeameter mould.