PIN HOLE TEST APPARATUS - FOR SOIL - ASTM D4647
Model Number : PH-ASTM-D4647
As per BS 1377:5; ASTM D4647. Pinhole Test Apparatus is used for evaluating the erodibility of clay soils by flowing water through a small hole that is drilled through the compacted specimen. The apparatus consist of a cylindrical plexiglass body (container) fitted top cap with a water inlet and the base cap with an outlet connection, a plastic nipple, a plastic centering guide, a wire punch (1.0 mm), a stand to support the apparatus with 1100 mm scale and standpipe tube(Ø4mm IDx6mm OD), four pcs wire mesh, 1,5m pvc tubing with a valve, 10ml, 25ml and 50 ml graduated glass measuring cylinders and an anvil with a tamper. Constant level water tank and de-airing water equipment should be ordered separately.
Pinhole Dispersion Device characterizes the dispersive properties of clay soils used in the 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 discursiveness. Additional computations of the water flow rate may also be required. A comparison with other methods indicates that the pinhole test has the best correlation with the actual erosion characteristics of cohesive soils.
A Plexi glass mold is held to the base by a unique clamping ring while the specimen is compacted. The end cap has a pilot hole for drilling the 1.0 mm (.040in) hole through the sample. Chamber and end-caps, mold, screens, base stand, a constant-head reservoir, tubing, pipet, and a tool for drilling the pinhole are included .
Features:
- Measures dispersive characteristics of cohesive soils
- Evaluates soils for dams and embankments
Included Items:
- Pinhole Dispersion Device
- Chamber and End Caps
- Mold
- Screens
- Stand
- Constant-Head Reservoir
- Tubing
- Pipet
- Drilling Tool
