The International Information Center for Geotechnical Engineers

Tuesday, 14 August 2018 09:45

Pinhole Dispersion Device by Gilson

HM-534 Pinhole Dispersion Device characterizes dispersive properties of clay soils used in construction of earth embankments and dams.

Water is directed through a small hole drilled through the compacted specimen. Observation of effluent cloudiness and final size of the pinhole qualitatively classifies soil dispersiveness. Additional computations of water flow rate may also be required. Comparison with other methods indicates that the pinhole test has the best correlation with the actual erosion characteristics of cohesive soils.


  • Measures dispersive characteristics of cohesive soils
  • Evaluates soils for dams and embankments
  • Anodized aluminum components resist corrosion

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Source: Gilson

Read 202 times Last modified on Tuesday, 14 August 2018 09:55

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