Pinhole Dispersion Device
The Pinhole Dispersion Device is designed to assess the dispersive properties of clay soils commonly used in earth embankments and dam construction. It works by directing water through a small hole drilled in a compacted soil specimen. The test evaluates soil dispersiveness by observing the cloudiness of the effluent and the final size of the pinhole. Additional calculations, such as water flow rates, may also be required. Studies show the pinhole test provides the most reliable correlation with the actual erosion behavior of cohesive soils compared to other methods.
The device features a stainless steel mold secured with a unique clamping ring during specimen compaction. The end cap includes a pilot hole for drilling a precise 1.0 mm (0.040 in) pinhole through the sample. Anodized aluminum components ensure corrosion resistance. The complete set includes a chamber, end caps, mold, screens, base stand, constant-head reservoir, tubing, pipet, and a drilling tool.
Key Features:
- Analyzes dispersive properties of cohesive soils.
- Ideal for evaluating soils used in dams and embankments.
- Corrosion-resistant anodized aluminum components.
Included Components:
- Pinhole Dispersion Device
- Chamber and End Caps
- Mold
- Screens
- Base Stand
- Constant-Head Reservoir
- Tubing
- Pipet
- Drilling Tool
Standards Compliance: ASTM D4647/4647M
