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What’s Asphalt Reinforcement Fiberglass Geogrid?
Lianyi® Asphalt Reinforcement Fiberglass Geogrid,whose full name is fiberglass geogrid.It is a flat mesh material made from alkali-free glass fiber yarn as raw material, which is woven into a grid-like base material through precise warp knitting technology, and then coated with a special modified asphalt coating or polymer coating on its surface.
Its core working principle is “a combination of hardness and flexibility” .
Glass fiber offers extremely high tensile strength and very low elongation (that is, it is very “rigid” and hardly deforms).
The asphalt coating ensures a perfect bond (” compatibility “) with asphalt concrete and provides short-term protection.
The grid structure enables the hot-laid asphalt concrete aggregates to pass through it, forming a three-dimensional mechanical interlock.
After being laid in the asphalt layer, it mainly bears tensile stress, acting like a “skeleton” to disperse stress and inhibit the opening and expansion of cracks.
Features Of Asphalt Reinforcement Fiberglass Geogrid
*Extremely high tensile strength: Under the same weight, its strength is higher than that of steel, and it can provide strong support for the road surface.
*Low elongation (<3%): This is the key to its resistance to reflective cracks. It hardly elongates by itself and can firmly “hold” both sides of the crack, effectively limiting displacement and preventing the crack from developing upward.
*Excellent heat resistance: Glass fiber itself is non-flammable and can easily withstand the high temperature of asphalt concrete paving above 160°C without melting or losing strength.
*Good physical and chemical stability: corrosion-resistant, does not rust, does not mold, and has a long service life in road environments.
*Rigid mesh is relatively brittle: this is one of its “disadvantages”. During transportation and laying, it needs to be handled with care to avoid bending and impact from hard objects, which may cause fiber breakage.
Advantages Of Asphalt Reinforcement Fiberglass Geogrid
*Outstanding anti-reflective crack capability: This is the most core and irreplaceable advantage of fiberglass geogrid. Its characteristic of “high strength and low elongation” makes it the preferred material for preventing cracks and joints on old roads from reflecting onto newly laid asphalt layers.
*The best performance-to-price ratio: Among all geogrids, fiberglass geogrids are the most economical and effective solution for the main demand of crack resistance.
*Effectively delay fatigue cracking: By dispersing the stress under wheel load, the tensile strain at the bottom of the asphalt layer is reduced, thereby significantly extending the fatigue life of the pavement.
*The construction is relatively simple: it is usually in roll form, light in weight and fast in laying speed. There are two types: self-adhesive type (with adhesive layer on the back) and nail-fixed type, which can meet different construction requirements.
Applications Of Asphalt Reinforcement Fiberglass Geogrid
*Old road renovation and repaving project
“White to Black” : Lay fiberglass grating on the old cement concrete road surface and then add an asphalt surface layer. It can effectively absorb and disperse the stress at the joints and cracks of the old board, preventing reflective cracks.
Repair and reinforcement of old asphalt roads: Lay them on the old asphalt road surface that already has a large number of cracks, and then apply a overlay to prevent the rapid development of the original cracks.
*Anti-cracking layers for newly-built roads
Semi-rigid base anti-cracking: Laid between semi-rigid bases such as cement-stabilized crushed stone and the asphalt underlayer. Semi-rigid base layers are prone to dry shrinkage and temperature shrinkage cracks under changes in temperature and humidity. Fiberglass geogrids can “shield” these cracks and prevent them from reflecting onto the asphalt surface layer.
*Stress-absorbing layers in road structures
It is used between layers of asphalt as a stress-absorbing intermediate layer to enhance the overall crack resistance of the pavement.
*Reinforcement of soft soil subgrade
Although it is not as strong as steel-plastic composite geogrid, it can be used in some medium-requirement soft foundation treatments to enhance the integrity and uniform load-bearing capacity of the roadbed and reduce pavement cracking caused by uneven settlement.
Keywords:
1. Geogrid