SOIL CONE PENETROMETER:

AS PER IS: 2720 (Part V)

Introduction:

• For determining the Liquid Limit of soils.
• This is specially useful to obtain reliable and accurate results for those soils which have low plasticity index.
• The percentage moisture contents determined when cone with half angle of 15-30 minutes under a total sliding weight of 148 ± 0.5 gm penetrates 25 mm gives the Liquid Limit.

General Description and Specifications:

• It will consist of metallic cone with half angle of 15' -30 ±15' and 30.50 mm coned length.
• It will be fixed at the end of a metallic rod with a disc at the top of the rod so as to have a total sliding weight of 148± 0.5 gms. The total rod shall pass through two guides. (To ensure vertical movement) fixed to a stand.
• Suitable provision will be made for clamping the vertical rod at any desired height above the surface of the paste in the trough.
• A brass trough 50 mm internal diameter and 50 mm depth.

Optional Accessories:

• Glass Plate: 10mm thick and about 45-50 cm square.
• Spatula : Flexible with blade about 8 cm long & 2 cm wide
• Evaporating dish: Made from porcelain material