Grout Bags and Fabriform are made and sold by the Intrusion Prepakt Company.These are woven nylon containers into which specially formulated cement mixtures are pumped.
Their use is many fold and does include revetments as well as knee walls for bridge abutment protection by water.
Fabriform is also used as an erosion control method under bridges on the slopes at each end.It has a "waffle" appearance.
Perhaps some of you have seen them.
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