In this test, a geosynthetic or geotextile is clamped to yield a clear diameter of 150 mm and a brass cone of 45 degree angle included, having a weight of 1 kg, is dropped through a height of 500 mm. The diameter of the resultant hole is measured with a graduated conical device.
Permeability of a geotextile must be substantially greater than that of the protected soil, so that water can pass freely from the soil through the fabric without build-up of hydrostatic pressure.
Soil retention is a predominant function of geotextiles in drainage and filtering applications. Pore size is the key parameter that controls the ability of the geotextile to retain the soil.
The geotextile Permeameter has been designed to meet the test requirements of water permeablity of Geotextile. It has been made keeping in view the growing requirement of testing of coir geotextile.
Gradient Ratio Test Apparatus (AIM 251 ) The US Army Corps of Engineers established a direct measure of geotextile clogging potential. They defined it as gradient ratio which is the ratio of hydraulic gradient through the geotextile plus 25.4 mm of the soil to that of hydraulic gradient through the adjacent 50.8 mm of the soil.
This test is necessary for drainage applications. The permeameters can be of parallel flow or radial flow type. In either case, flow occurs along the plane of the permeameters. In the apparatus, flow occurs radially outwards, from a central hole to the periphery of a circular specimen.
Soil reinforcement is a recent and fast developing technique to improve soil behaviour for a variety of civil engineering works; e.g. earth retaining structures, slope stability, land slides protection works, pavement, etc. A correct assessment of the soil / reinforcement frictional relationship is essential.
Exceptional crushing capacity with minimum power consumption is obtained by the unique movable jaw motion. This ensures maximum production in the lab and field. The Jaw Crusher is a primary sample preparation unit and is required for size reduction of various kinds of materials. Desired crushing takes place when fed particles experience pressure exerted by the jaw blade action. By this action the particles are crushed to smaller sizes.
Pull out Test Apparatus is being especially designed to measure the interface friction between GI Strips I Geosynthetics and Soil. The use of reinforcements provides additional shear stress in the soil mass through the tensile force in the reinforcement. The considerable increase in the use of geosynthetics in the reinforced soil structures led to the development of testing procedures to evaluate their interaction properties.
The tests for permittivity and transmissivity help in comparing one fabric to another, but gives no indication of the hydraulic behaviour of the composite soil-fabric system. Under steady state and reversing flow conditions, fabric clogging or binding causes a decrease in water flow rate and corresponding increase in hydraulic head loss through the geotextile.
Servo-Hydraulic Static and Dynamic Actuator Assembly Capacity 70kN• Providing and fixing of circular steel plate of diameter 150 mm and 300 mm having thickness 50 mm on the bottom piston rod. Bottom of the plate is provided with buffer base• System has Two types of Loading- Dynamic (for fatigue test) and Static (for Ramp)• Stroke Length 100mm (+-50mm) • Displacement accuracy: ± 1% of indicated value of the displacement.
