Asphalt is an almost ideal material for road construction, but reflective cracking in new asphalt layers is an increasing problem. This type of cracking is mainly the result of thermally- or traffic-induced fatigue of the asphalt.
Reflective cracks can form in asphalt laid over concrete carriageways through the horizontal movements of individual concrete slabs. As well as expansion and contraction as a result of daily or seasonal temperature fluctuations. These movements create high tensile strains in the asphalt, leading to cracks forming directly above the joint in the concrete.
When a wheel load passes over a crack in the road, bending and shear stresses are induced in the asphalt layer. The degree of stress depends on the thickness of the bituminous overlay and existing asphalt surfacing. The bearing capacity of the subgrade and the amount of interlock at the crack. If the asphalt overlay is subjected to traffic load as well as a continuous cyclic movement, the strength and stiffness of the overlay are reduced by each loading event until reflective cracking occurs.
By using flexible HaTelit® reinforcement grids you can delay or even completely prevent this type of damage in asphalt layers.
HaTelit® provides highway engineers with the right answer to reflective cracking. See available options below:
HaTelit® C: Flexible grid for durable, high-performance reinforcement of asphalt layers.
HaTelit C 40/17 comprises a reinforcement grid made from high-modulus polyester yarn with an ultra-lightweight nonwoven backing. As proven by its 40-year track record, HaTelit C offers a highly durable and thus cost-effective solution which, thanks to the special properties of polyester, is well able to withstand long-term dynamic loads.
- Optimum retardation of reflective cracking
- Maximum resistance to installation damage
- High resistance to long-term dynamic traffic loads
- No loss of strength due to moisture
HaTelit® BL: Self-adhesive reinforcement grid for rehabilitation of asphalt and concrete pavements.
The flexible, high-tensile reinforcement grid made from high-modulus polyester yarn laminated with bitumen sheet is particularly suitable for the rehabilitation of small asphalt and concrete pavement areas. The use of HaTelit BL also prevents any moisture or frost from infiltrating into the lower asphalt layers.
- Self-adhesive thanks to laminated bitumen sheet
- No need for additional spraying with bitumen emulsion
- Ideal for small pavement areas
- Reduced effort thanks to fewer site operations and lower plant requirement
HaTelit® G: Innovative combination of coating with 60 % bitumen content and glassfibre for asphalt reinforcement.
The new HaTelit G is the first HUESKER reinforcement grid to successfully combine the positive features of a 60 % bitumen content coating – a hallmark of the HaTelit range – with a glass-fibre product. As with other products, installation is simplified by the incorporation of an ultra-lightweight backing.
- Efficient retardation of reflective cracking
- High resistance to installation damage
- Straightforward installation
- Choice of two tensile strengths as standard
HaTelit® XP: Reinforcement grid made from unique raw material offering maximum flexibility.
HaTelit XP is manufactured from polyvinyl alcohol (PVA) and thus exhibits a variety of useful characteristics. Being alkali-resistant, the reinforcement grid can be installed in asphalt or, if necessary, directly on milled concrete pavements. The fact that it also possesses all the familiar features of the HaTelit range makes this product particularly versatile in meeting diverse challenges.
- Highly efficient retardation of reflective cracking
- Very high resistance to installation damage
- High resistance to long-term dynamic traffic loads
- Durable resistance in alkaline environments (on concrete surfaces)
SamiGrid®: Product of choice for rehabilitation of concrete pavements with asphalt.
SamiGrid is a composite product comprising a geogrid made from highmodulus polyvinyl alcohol (PVA) in combination with a 130 g/m2 nonwoven fabric. The reinforcing action of the grid is complemented by the sealing function of the bitumen-saturated nonwoven. Due to its alkali resistance, SamiGrid is a perfect option for the rehabilitation of concrete pavements.
- Composite comprising PVA reinforcement grid and 130 g/m2 nonwoven
- Ideal for rehabilitation of concrete pavements (alkali-resistant)
- Stress-relieving and reinforcing function
- Very high resistance to installation damage
Still searching for the correct geosynthetic? View the rest of our geosynthetic options here.
