Practical use of geotextiles, dornit




Dornit is a non-woven or woven air- and water-permeable fabric of textile, which is in contact with water, soil, as well as materials that are used in construction. Dornit is the native name, “dor” – road, “nit” – thread, and the word geotextile itself comes from the Latin “geo” – earth and the word textile. In the process of manufacture such technologies, equipment, raw materials and heat treatment are used which allow receiving materials with a huge range of operational and consumer properties, therefore the material is better to buy from reliable suppliers of Geostroy Trading House. Dornit geotextiles are mainly used in road construction. With its help the durability and stability of the road surface increases significantly. Dividing the layers of road soil, this material prevents their mixing, which reduces the bearing capacity of the structure as a whole.

    For the construction of oil pits, sludge pits, strengthening of slopes, river banks, drainage structures.

  • Prevents the penetration of moisture.
  • Distributes the loads over the entire surface of the stratum nullum.
  • Prevents squeezing.
  • It has increased heat resistance.
  • Absorbs sounds and noises.

Article Summary:

General Information

Dornit is a special non-woven air- and water-permeable geotextile fabric, which is usually in contact with water, soil and materials used in modern construction. It is worth noting that due to its high technical indicators, dornit is particularly popular

The main method of production is thermal

Modern thermally bonded geotextiles are made of continuous fibers by means of their special bonding by means of temperature exposure. Needle-punched geotextiles are also commonly called thermal-bonded geotextiles, where a special fusible fiber is added additionally. The resulting fabric is subjected to heat treatment, and as a result the fibers are rather rigidly fastened to each other, and the overall tensile strength of the material is increased.

For this reason, modern heat-strengthened web is actively used wherever it is necessary to withstand serious loads, for example: in the special reinforcement of slopes, in the performance of various foundation works and the strengthening of existing coastal slopes. Modern heat-strengthened geotextiles are usually less thick when compared to different non heat-strengthened and nonwoven geotextiles, with the same surface density of used construction materials.

That’s why it’s best to use dornit for many tasks. Using competently modern geotextiles you can always be sure of high quality. In addition, it has lower filtration properties, but they have a relatively high initial modulus of deformation, like different woven materials, and a significant elongation at break, like different – needle-punched.


The dornite is laid in transverse or longitudinal direction relative to the general axis of the embankment. The longitudinal laying is the most convenient in terms of technology, but it does not provide a proper uniform strength of cloths across the entire width of the embankment, and this in turn is mandatory in the arrangement of various modern reinforcement layers for weak foundations.

When installing fabrics to create special protective layers along the entire earth bed, all rolls are rolled out completely by hand, usually by a team of three trained workers. After unrolling several meters, the initial edge part (namely along the width) of the web is pressed to the ground by ordinary two or three anchors. The anchor rods themselves (with bent upper and somewhat pointed lower ends) should have a diameter of 0.3 to 0.5 cm and a total length of 15…20 cm.

The subsequent rolling out of the web is carried out with periodic flattening of the entire surface and with a slight tension of it in the longitudinal plane and ensuring its attachment to the ground with special anchors (or in another similar way) every ten to fifteen meters (usually every one and a half to two meters when arranging a special layer of geotextile for a weak base).

Such fastening is done to avoid significant displacement of the web when exposed to wind loads, laying of the subsequent layer, as well as to generally maintain a slight pre-tension of the modern geotextile.

All fabrics are laid with some overlap (not less than 30 cm) and, if necessary, they are connected. When laying a layer of modern geotextile in the base of any embankment, which is composed of weak soils, the total size of the overlap is slightly increased usually by a distance of at least 50 cm.

When installing webs – in order to create reliable protective-reinforcing layers (usually in the transverse direction), the total overlap should be at least 50 cm in the absence of a common joint.

All webs are specially fastened to the ground with special anchors, which are installed at the width of the slab usually every one and a half to two meters.

This special connection of the webs will reduce significantly the amount of their overlap. The most preferred type of modern connection of fabrics is their special stitching with the use of bag sewing machines.


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