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<font size=3>'''MnDOT specifications for geotextile under riprap'''. </font size><br>
Link to this [[Creating MnDOT specifications for geotextile under riprap|table]]
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Link to this [[MnDOT specifications for geotextile under riprap|table]]
  
 
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Revision as of 18:18, 11 March 2019

MnDOT specifications for geotextile under riprap.
Link to this table

Geotextile Properties for Use Under Riprap
Geotextile Property
Test Method (ASTM) and Units
Type 3 (under Class I and Class II random riprap) (a)
Type 4 (under Class III and Class IV random riprap and hand-placed riprap, slopes up to 3:1) (a)
Type 7 (under Class III and Class IV random riprap, slopes > 3:1) (a)(b)
B1 Grab Tensile Strength minimum, each principal direction
D4632 lb
100
200
300
B2 Elongation minimum, each principal direction
D4632 percent
50
50
50
B3 Seam Breaking Strength minimum (c)
D4632 lb
90
180
270
B4 Apparent Opening Size (AOS) maximum (d)
D4751 U.S. Std. sieve size
50
50
50
B5 Permittivity minimum (e)
D4491 falling head sec−1
0.5
0.5
0.5