Long-term asphalt reinforcement webinar – 9th March 2022

The low tensile strength of asphalt means it can be easily damaged by a number of factors including settlement, fatigue, temperature fluctuations and vehicle loadings. Damage arising from reflective cracking usually manifests as a cracked or broken surface (such as pot holes) which has implications for the comfort of the road user, causes vehicle damage and adds to the on-going maintenance costs for the operator of the paved area. As can be seen following the recent storms, these cracks enable the penetration of water through the surface, leading to further deterioration of the overall road structure and an increase in maintenance costs.

To strengthen and maximise overlay lifetime, anti-reflective cracking interlayers can be used that offer extended maintenance intervals. A variety of anti-cracking geosynthetic systems exist, such as SAMls, non-woven geotextiles, geogrids (plastic, glass and carbon), combigrids and steel-cord reinforcement grids. The most important parameters for obtaining good anti-cracking behaviour are “stiffness” of the material as defined by Young’s Modulus EA (material cross section A * material modulus E) and the adhesion within the pavement layers, including the existing surface as well as the overlay.

A webinar to introduce the asphalt reinforcement subject in more detail, including the most common failure mechanisms and the key installation, testing and performance criteria is scheduled on the 9th March. To reserve your place please register here.

Alternatively, to request a technical seminar for your highways engineering team on another date, please submit the form on our CPD page.