Changes

Geotextiles can be used to prevent downward migration of smaller particles in to larger aggregates, and slump of heavier particles into finer underlying courses.

Geotextiles can be used to prevent downward migration of smaller particles in to larger aggregates, and slump of heavier particles into finer underlying courses.

The formation of biofilm on geotextiles has also been shown to improve water quality:

The formation of biofilm on geotextiles has also been shown to improve water quality:

#The suitable apparent opening size (AOS) for non-woven fabrics, or percent open area (POA) for woven fabrics, to maintain water flow even with sediment and microbial film build-up.

#The suitable apparent opening size (AOS) for non-woven fabrics, or percent open area (POA) for woven fabrics, to maintain water flow even with sediment and microbial film build-up.

{|class="mw-collapsible mw-collapsed wikitable"

{|class="wikitable"

|-

|-

! style="background:white; color:red"|Recommended criteria for selection of geotextile fabric'''

|+Recommended criteria for selection of geotextile fabric

|-  

|-  

!style="background: darkcyan; color: white"|Percent soil/filter media passing 0.075 mm (#200 sieve)

!Percent soil/filter media passing 0.075 mm (#200 sieve)

!style="background: darkcyan; color: white"|Non-woven fabric apparent opening size (AOS, mm)

!Non-woven fabric apparent opening size (AOS, mm)

!style="background: darkcyan; color: white"|Woven fabric percent open area (POA, %)

!Woven fabric percent open area (POA, %)

!style="background: darkcyan; color: white"|Permittivity (sec^-1)

!Permittivity (sec^-1)

|-

|-

|>85||≤ 0.3||-||0.1

|>85||≤ 0.3||-||0.1

|≤ 5||≤ 0.6||≥ 10||0.5

|≤ 5||≤ 0.6||≥ 10||0.5

|}

|}

 

[[category:materials]]

[[category:materials]]