Pinhole Dispersion Test Apparatus

Pinhole Sherard and his colleagues devised Soil Erosion Test in 1973 and its results were presented in an article in 1976. The divergence of fine-grained soils start with vertical load directly with distilled water and water flow horizontally 50mm (2in) from a track 1mm diameter hole in the sample. By this load, the quality of Water extracted from the sample is the basis of Separation the divergent and non-divergent clays. Soil samples are condensing in the desired diameter of the cylinder on the sand of coarse aggregate and mesh smaller than 2mm Which is already been tested in cells, the height of Sample in the test must be 38mm. a needle with a diameter of 1mm created a hole along the longitudinal axis of the sample. The device is placed in a position where the hole is on the horizon, In this case, distilled water, respectively water loads 50, 180 and 380 and 1020 mm in the given period of time passes through the hole of the sample.

All equipment including pinhole tests such as sample mold, manometer, water tank, circulation pump, vertical load cylinder of water, hose and rubber pipe in a metal chassis with electrostatic paint have been placed.

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