TENSILE STRENGTH/ DROP RESISTANCE

Universal Testing  Machine For Geotextile. 10 Ton 
EKE 246:

The evaluation of the tensile properties of geotextiles is of paramount importance not only in reinforcement applications but in all other uses. Important properties include stress-strain behavior, ultimate strength in uniaxial tension (under different widths) creep, etc. Recent researches have made it clear that the measured stress-strain behavior of geotextiles is significantly influenced by the details of testing procedures like method of gripping the fabric, rate of deformation. Sample size/aspect ratio, initial preload and fabric conditioning. EKE 246 Universal testing System for Geotextiles enables determination of these properties under a variety of test conditions. The 100 KN capacity system has speed ranges from 5 to 320 mm/min.
The machine is supplied complete with EKE 24601 Electronic Measuring system comprising of one 100 kN (10,000kgf) capacity load call, one 10Kn (1,000kgf) capacity load cell and a two channel 3 ½  digit indicator.

The Following  Attachments  Are  Available For  This  System ( At  Extra  Cost)

Narrow and wide width Tensile Strength
Two clamping System 8 cm wide and 22.5 cm wide are mechanical wedge type and facilitate narrow strip and wide width tensile Strength tests as per many international specifications viz India, British ASTM etc.  These grips allow simple and rapid sample loading, roller type grips required in high strength geotextile testing can be supplied as optional Extra.
EKE 24605: Narrow strip tensile strength grip, wedge type 8 mm wide,
EKE 24606: Wide Width Tensile strength grip wedge type 225 mm wide.
EKE 24607: Roller grip for narrow strip strength test
EKE 24608: Roller grip for wide width test

Grab tensile Strength Test
This test measures the ability of the geotextile to distribute concerted load. Specially devised clamps (25 mm wide0 with a gauge length of 100 mm are placed across 200 mm square samples or 200 mm x 100 mm samples. The sample is then subjected to tension at a specified rate until the failure occurs. It is widely used by manufactures as a quality control tool and as such is the most commonly reported tensile strength value. It can also be used for relative comparison between geotextiles of the same type,

EKE 24609: Grab tensile strength test grip
EKE 24610: Trapezoidal Tear Resistance Test Grip

Trapezoidal Tear Resistance Test
Geotextiles can  be cut punctured during field installation which can create a possible condition by which strength is controlled by tearing resistance, in the method suggested by ASTM-D4632, an outline of an isosceles trapezoid is marked on a rectangular specimen (150 mm x 75 mm) cut for the determination of tearing strength, ( with a 6 to 9 mm cut) and the non-parallel sides of the trapezoid, marked on the specimen are clamped in parallel jaws of the tensile testing system thereby. The separation of the jaws is continuously increased with simultaneous recording of the load, the tearing strength is the value for estimating the relative tear resistance of different geotextiles or different directions to the same fabric.

CBR Push Through Test Attachments

EKE 24611:

In this developed in west Germany (DIN – 54307 E), fabric is clamped to given an inner diameter of 15 cm and a standard CBR plunger is pushed centrally through a fabric at a specified rate. The load at failure is the push through load and when divided by the cross – sectional area of the  plunger, gives CBR push through resistance. This gives the resistance of  fabric to withstand localized pressure, which is particularly noticed in pavement systems.

Puncture Test Attachment  

EKE 24612:
In this test, developed by the Crops of Engineers , USA, the geotextile specimen is clamped to obtain an inside dia. 44.45 mm and force is applied through an 8 mm dia. plunger till failure. The Modified ASTMD-3787 provides for a hemispherical plunger and accordingly EKE 24612 has been developed. The puncture strength so obtained is felt to reflect the fabrics ability to withstand aggregate penetration.

EKE 24612 Puncture Test Attachment

Cone Drop Testing Apparatus

EKE 247:

This test was developed by the Norwegian road research Laboratory (NRRL) and is widely used in Europe in evaluating the resistance of geosynthetics/ geotextiles to damage during  installation due to dropping of sharp edged or sharp pointed stones on a geosynthetics / geotextile directly.

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. 

The smaller the hole, the greater the resistance of geosynthetic / geotextile to damage, when used in combination with other direct tensile test results, it provides a convenient means of qualitative comparison.

Essential Accessories
(Included in output)

EKE 24701: Graduated Conical Measure