Geosynthetic Pull-out Test Apparatus

Geosynthetic Pull-out Test ApparatusThis equipment was developed jointly by CSIR-Central Road Research Institute and AIMIL. This has now been installed in CSIR-CRRI and it is one of very few such facilities available in India. Geosynthetic Pullout Test Apparatus is used for determining the interfacial friction between reinforcement (GI Strips, Geosynthetics, etc) and backfill soil. These results are very vital for designing safe and economical mechanically stabilised soil structures. In this apparatus, geosynthetic material is embedded between two layers of soil. For conducting the pullout test, normal compressive stress is applied to the top soil layer and magnitude of force required to pull the geosynthetic out of the soil is recorded. Pullout resistance is obtained by dividing the maximum load by the test specimen width. A plot of maximum pullout resistance versus applied normal stress is obtained by conducting a series of such tests. The test method is applicable to all types of geosynthetics and different kinds of soils and other types of backfill materials.

Features of the Equipment

  • Suitable for testing Pullout Interface properties of Geogrids and G.I strips in Soil structures
  • Normal Load upto 200kN
  • Pullout force upto 200kN
  • Sample Size from 600mm x 450 mm to 0.9m x 1m
  • Rugged and sturdy Construction to ensure accuracy of results
  • Variable Pull speeds available
  • Used in the design of reinforced retaining walls, slopes and embankments
  • Robust and accurate data acquisition system
  • 25 Channels Data acquisition System (Feasible for expansion)