Pinhole Test Apparatus

The apparatus consists of a cylindrical metal container fitted one end with a water inlet and the other end with an outlet connection, a standpipe tube with scale and a stand to support the apparatus.

Standards Compliance :

• Complied as per BS 1377-5, ASTM D4647

Application :

• Pinhole Test Apparatus is used for evaluating clay soils for erodibility by flowing water through a small hole that is drilled through the compacted specimen.

Dimensions (cm) :

• 15°20°120

Weight (kg) :

• 4

Purpose :

• Certain fine-grained soils with high sodium content are highly erodible by the water flowing through them. During the test the flow of water under a high hydraulic gradient through a cavity in the soil is reproduced.