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Item |
Testing Method |
Unit |
|
|
|
Grad Tensile Strength |
ASTM-D 4632 |
N |
890 |
1110 |
1400 |
Grab Elongation |
ASTM-D 4632 |
% |
20 |
20 |
20 |
Puncture Strength |
ASTM-D 4833 |
N |
400 |
489 |
667 |
CBR Puncture |
ASTM-D 6241 |
N |
3110 |
3335 |
4000 |
Mullen Burst |
ASTM-D 3786 |
kPA |
2578 |
3447 |
4137 |
Trapezoidal Tear |
ASTM-D 4533 |
N |
330 |
400 |
533 |
Apparent Opening Size |
ASTM-D 4751 |
mm |
0.425 |
0.425 |
0.425 |
Permittivity |
ASTM-D 4491 |
Sec-1 |
0.05 |
0.05 |
0.05 |
Water Flow Rate |
ASTM-D 4491 |
1/m/m2 |
160 |
160 |
160 |
UV Resistance |
ASTM-D 4355 |
% 500hrs |
70 |
70 |
70 |
Roll Width |
|
m |
3.81 4.57 5.33 |
3.81 5.33 |
3.81 5.33 |
Roll Length |
|
m |
131.7 109.8 94.2 |
109.8 78.6 |
109.8 120 |
Mass |
|
g |
200 |
290 |
350 |
Applications
1-Construction of roads and other trafficked areas (excluding railways and asphalt inclusion)
2-Construction of railways,
3-Earthworks, foundations and retaining structures,
4-Use in drainage systems,
5-Erosion control works (coastal protection, bank revetments),
6-Construction of reservoirs and dams,
7-Construction of canals,
8-Construction of tunnels and underground structures,
9-Use in solid waste disposals,
10-Use in liquid waste containment projects,
Item |
Testing Method |
Unit |
|
|
|
Grab Tensile Strength |
ASTM-D 4632 |
N |
1401.8x1401.8 |
2002.5x1557.5 |
2114x1958 |
Grab Elongation |
ASTM-D 4632 |
% |
20 |
20 |
20 |
Wide Width Tensile Strength |
ASTM-D 4595 |
KN/m |
35x35 |
52.6x52.6 |
70.1x70.1 |
Wide Width Elongation |
ASTM-D 4595 |
% |
12x8 |
15x10 |
9 |
Wide Width Tensile Strength at 2% Strain |
ASTM-D 4595 |
Kn/m |
3.5x3.5 |
7.0x6.1 |
8.8x12.3 |
Wide Width Tensile Strength at 5% Strain |
ASTM-D 4595 |
KN/m |
11.4x20.5 |
20.3x25.4 |
35.0x39.4 |
Wide Width Tensile Strength at 10% Strain |
ASTM-D 4595 |
KN/m |
26.2x36.8 |
46.4x50.8 |
70.1x56.1 |
CBR Puncture |
ASTM-D 6241 |
N |
6230 |
7120 |
9790 |
Trapezoidal Tear |
ASTM-D 4533 |
N |
556 |
801x623 |
890 |
Apparent Opening Size |
ASTM-D 4751 |
mm |
0.425 |
0.600 |
0.600 |
Permittivity |
ASTM-D 4491 |
Sec-1 |
0.70 |
0.52 |
0.40 |
Water Flow Rate |
ASTM-D 4491 |
1/m/m2 |
2037 |
1629.8 |
1222 |
UV Resistance |
ASTM-D 4355 |
% 500 hrs |
80 |
80 |
80 |
Roll Width |
|
m |
4.57 |
3.81 4.57 |
4.6 |
Roll Length |
|
m |
91.5 |
109.8 91.5 |
91.5 |
Mass |
|
g |
360 |
430 |
430 |
Properties of Woven Geotextile
Tensile Strength :Ability to resist stresses in the plane of the fabric
Puncture Strength :Especially during construction, the geotextile must withstand pressures applied from surrounding aggregate
Percent Open Area (filtration only):Measures the amount of light passing through the fabric , which is indicative of the geotextile’s ability too resist clogging
Trapezoidal Tear Strength : the ability of the fabric to resist tearing if ruptured
Functions
- Separation – preventing the mixing of two layers of soil having different particle sizes. Performance criteria to be concerned with are AOS, Tear, Tensile Strength, Permeability, and Permittivity.
- Filtration- retaining fine particles while allowing water to flow through geotextile. The geotextile is intended to act like a filter not a drain. Therefore close attention should be paid to performance criteria such as AOS, permeability, and permittivity. The physical properties of the fabric must allow adequate flow, proper soil retention and resists clogging.
- Drainage- to gather liquids or gases that are not required functionally by structure and discharge them. Performance criteria to be concerned with are Mass, Transmissivity, and Permeability.
- Reinforcement- providing a tensile element to the soil matrix and thereby provide more competent structural material .To be effective a geotexile must be able to transfer its strength to the soil it is reinforcing and maintain its strength. It must act as a conduit to allow water to pass through it readily, yet able to filter out fine materials that can weaken the soil. Performance criteria to pay attention to are Grab, Elongation, Tear and Mass.
- Protection- of synthetic membranes against puncture, abrasion and perforation. Often referred to as a cushion layer. Performance criteria to be concerned with is Puncture, Mass
Woven Geotextiles
- Functions- separation, reinforcement, filtration
- Excellent puncture and tear resistance along with high tensile strengths
- Uniform opening provide excellent flow and filtration characteristics
- Lightweights are typically used for separation of good to moderate sub grades and for controlling run-off and flow velocity.
- Heavy weight Wovens are typically used for separation and reinforcement and applications such as the stabilization of weak sub grades for heavy loads or if the base material is abrasive.
- Low deformation systems such as paved road on weak sub grades require a product that will increase the bearing resistance of the sub grade as well as provide separation and filtration under long term dynamic loads
- Consider a Woven geotextile with high modulus, high flow and an AOS compatible with sub grade soils
High Strength Wovens
- Functions – reinforcement, filtration, separation
- Properties- immediate load take up with low elongation, low creep and high tensile strengths
- High soil interaction – soil confinement / greater load distribution
- High percent open area for long term free flowing filtration and drainage
- High seam strength – weak soil conditions and demanding stabilization applications
- High strength geotextile have been used in applications such as retaining walls, landfill liner reinforcement, extra steep earthwork, soil stabilization for rail and road construction, bulkheads, and even underwater
Woven Filter Fabric
- Functions- Filtration, Erosion Control
- Manufactured with unique physical and hydraulic properties not possible with standard geotextiles
- These materials allow water to flow through them while filtering or capturing sediment.
- High strengths for durability and survivability
- High percent open area for long-term clogging resistance
- High flow rates
- Excellent for shoreline erosion control, leachate collection systems, drainage and curb inlet filters, geotextile tubes, and geotextile filter bags.
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