Transportation Geotechnics Lab

Dynamic Triaxial Testing Equipment

This is a high-quality stress-path triaxial testing system consisting of a rigid 2-column-load frame, a cyclic actuator, a multi-channel, as well as a high-speed control system with a 20-bit resolution for dynamic axis loads. These systems also include actuators to control cell pressure, back pressure and optional pore air pressure. GEOsys software enables us to produce various types of wave shapes, such as sine, square, haversine, and customised wave shapes.

Standard triaxial tests (CD, CU, UU)
B-value check control
Stress path triaxial tests (p, q and s, t)
Resilient modulus (AASTHO T307-99)
Uniaxial compression test
Consolidation tests
Isotropic and anisotropic consolidation
User-defined test procedure with advanced GEOsys software
High-precision strain, stress, and position closed-loop controlled load frame

Automated Triaxial Test Equipment

It can be used to perform CU, UU or CD tests
Advanced test modules like K0 consolidation and stress path modules can be performed in K0
To determine the effect of stress-induced anisotropy on the soil's shear behaviour, a stress-path triaxial test is performed.
Anisotropic consolidation more closely resembles actual field conditions.
The soil sample is anisotropically cemented before being sheared with a constant rate of axial strain.

Lightweight Deflectometer (LWD)

LWD is a portable device used in the field to measure the deformation characteristics of soil and other types of granular materials.
This equipment is designed to provide a quick and non-destructive method for determining the load-bearing capacity of soil and assessing its stiffness.

Large scale pavement model setup

The objective is to simulate the field pavement condition under wheel loading to find the rutting and fatigue behaviour.

Setup Configuration:

LSMPE has different components:

Reaction frame with actuator and load cell to apply load.
Loading plate of 300mm diameter to simulate wheel contact area.
Test chamber of size (1500x1500x1000) mm (L x W x H).

Large Scale Pullout test setup

This setup aims to conduct axial pullout test for the geogrids using different types of fill materials, assess the performance of embedded reinforcement, and determine its ability to prevent slippage.

Setup Configuration:

The setup for the axial pullout test consists of the following components (along with its specifications):

Pullout test frame with axial and transverse components
Test chamber: 900 x 900 x 1000 mm (L x W x H) with 400 mm wide and 20 mm deep geogrid opening.
Axial pullout setup: hydraulic cylinder, load cell, clamping plate, and sleeve system.
Gripping mechanism: two serrated mild steel plates, twelve bolts per row, and three extra bolts to prevent slippage.

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