Geotextile Materials Selection | Mesh to Micron Conversion

Geotextile Materials Selection

Mesh to Micron Conversion

Geotextile materials are available in a range of fabrics to accommodate applications that require stabilization, aggregate separation, or filtration. When choosing a material, one of the most commonly asked questions is what micron size they are able to contain. To answer these questions, a mesh to micron conversion chart is available below for some of our standard fabrics:

Fabric US Sieve (AOS) Micron
3.1 oz. Nonwoven 50 297
3.5 oz. Nonwoven 50 297
4 oz. Nonwoven 70 210
6 oz. Nonwoven 70 210
8 oz. Nonwoven 80 177
10 oz. Nonwoven 100 149
12 oz. Nonwoven 100 149
16 oz. Nonwoven 100 149
Woven 200 40 400
Woven 315 40 400

 

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The chart below is designed to serve as a guide for classifying your material with micron/US Sieve rating.

US Sieve Micron Size Typical Material
28 700 Beach Sand
60 250 Fine Sand
200 74 Portland Cement
325 44 Silt

Available Geotextiles

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Non Woven Geotextiles

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Woven Geotextiles

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Complete Mesh to Micron Chart

Listed on all of our geotextile specification charts is a property called AOS or Apparent Opening Size. The value for the AOS will be listed in US Sieve. Match the US Sieve for your fabric to find the size in inches, millimeters and microns.

U.S. Sieve INCHES Microns MILLIMETERS
3 0.2650 6730 6.730
4 0.1870 4760 4.760
5 0.1570 4000 4.000
6 0.1320 3360 3.360
7 0.1110 2830 2.830
8 0.0937 2380 2.380
10 0.0787 2000 2.000
12 0.0661 1680 1.680
14 0.0555 1410 1.410
16 0.0469 1190 1.190
18 0.0394 1000 1.000
20 0.0331 841 0.841
25 0.0280 707 0.707
30 0.0232 595 0.595
35 0.0197 500 0.500
40 0.0165 400 0.400
45 0.0138 354 0.354
50 0.0117 297 0.297
60 0.0098 250 0.250
70 0.0083 210 0.210
80 0.0070 177 0.177
100 0.0059 149 0.149
120 0.0049 125 0.125
140 0.0041 105 0.105
170 0.0035 88 0.088
200 0.0029 74 0.074
230 0.0024 63 0.063
270 0.0021 53 0.053
325 0.0017 44 0.044
400 0.0015 37 0.037

 

 

Geotextile Application Chart

To help select which type of the various geotextile materials are best suited for various applications, the following table has been developed.

Product Type
Application
Nonwoven Fabric
  • Subsurface Drainage and Filtration
  • Erosion Protection
  • Asphalt Overlays
  • Stabilization and Separation
  • Railroads Only Use Heavy Weight Nonwovens
  • Pond Underlayments
Woven Slit Film Fabric
  • Stabilization and Separation
  • Silt Fence
Woven Mono Filament Fabric
  • Subsurface Drainage and Erosion Protection (mainly in gap graded soils)
High Strength Wovens
  • Stabilization and Reinforcement
Grids
  • Stabilization and Reinforcement
Drainage Nets
  • In-Plane Drainage (when combined with light weight nonwovens)
Pre-Fabricated Drainage Structure
  • Subsurface Drainage
Matting
  • Erosion Protection
Combination of Grids and Nonwoven Fabric
  • Special Stabilization and Reinforcements Where Separation is Needed (i.e. under sewer lines or in soils prone to pumping)


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Natural Fiber Products:

As an alternative to synthetic materials, coir geotextiles can also be implemented to help with stabilization in your location. Unlike geotextiles, coir is natural product that will biodegrade throughout the duration of its use. Natural fiber materials can be seen below:

 

Need help determining which geotextile material will work best for your location? Give us a call at +1-772-646-0597 .

Questions? We can help! Call our team at +1-772-646-0597 or submit a form.