Geotextile

Geotextiles are permeable fabrics which when used in association with soil, have the ability to separate, filter, reinforce, protect or drain.

Geotextiles are made from either polypropylene or polyester and geotextile fabrics come in three basic forms: woven, needle punched (resembling felt), or heat bonded (resembling ironed felt). In Australia the most popular geotextile used is the polyester needle punched fabric, as the polyester is more UV stable than the polypropylene material.

Geotextile uses:

• Filter: Geotextile fabric is an excellent filtering medium as it allows fluid to pass through the fabric yet retains fine particles, as you would see in an aggy drain. Great for wrapping perforated pipes and rock to create a path for fluid to pass though yet keep the fines out. Another large use in Australia is in the construction of a landfill cell, where filter geotextile sits atop the filtration rock separating the waste material placed on top allowing the leachate to pass through down to the liner.

• Separate: Geotextile when used as a separation layer prevents two different fill materials such as aggregate and soil from combining. When used correctly the geotextile will increase the life span of the civil project, allowing the two separate layers to perform as designed for longer.

• Protection: Geotextile when used as a protection layer acts as a cushioning barrier between the geosynthetic  lining system and other layers of the dam or landfill cell. Generally the larger mass rolls of geotextile provide the best cushioning protection. As a protection barrier it helps prevent puncturing and leaks from external forces coming into contact with the liner.

Geotextile comes in varying widths, lengths and thickness. Below is a table regarding sizes. FW is the thinnest material and A64 is the thickest material.

Range	Strength Class	Length (m)	Approximate Mass Per Roll Width (kg)
			2.0m	3.0m	4.0m	6.0m
FW		50	16	24	32	48
A14	A	100/250	32/78	47/117	63/156	94/234
A19	B	100/200	40/80	60/120	80/160	118/238
A24		100/175	44/76	66/114	88/152	130/227
A29	C	150	75	114	150	225
A34		150	84	126	168	252
A39	D	125	84	125	166	250
A44		100	75	114	151	227
A49	E	75	72	108	145	215
A64		75	77	115	154	231

Geotextile in a landfill application is joined by overlapping approximately 150mm and heat bonding together.

Geoline can supply all your geotextile needs and are only too happy to help install it.

To get a geotextile quote please Contact Us.