Geogrid apertures are matched to the aggregate placed on them so particles strike through and lock in; too small and the grid acts like a slip sheet, too large and stone falls through without interlocking. Design rules tie aperture size to the coarser fraction of the aggregate grading. In woven geotextiles, aperture size and percent open area govern filtration.
Aperture is two inches and they're bringing in three-quarter minus, that stone will just fall through.
Also heard as
- opening
- grid opening
Related terms
Geogrid
Polymer grid with large open apertures that interlocks with soil or aggregate to reinforce or stabilize it.
Biaxial geogrid
Geogrid with similar strength in both directions, used mainly to stabilize aggregate bases over soft ground.
Monofilament woven
Woven geotextile of round single-strand yarns that leaves regular open pores for high flow and good filtration.