Fahrbahnabsorption

Fahrbahnabsorption refers to the phenomenon of a road surface absorbing certain substances, rather than repelling them. This absorption can impact the performance and longevity of the pavement. Different materials used in road construction exhibit varying degrees of Fahrbahnabsorption. For example, porous asphalt, designed to allow water to drain through, will also absorb other liquids that come into contact with it. This can include oils, fuels, and de-icing agents.

The absorbed substances can have several effects. Water absorption is a key function of permeable pavements, aiding in stormwater management and reducing surface runoff. However, the absorption of other chemicals can be detrimental. Oils and fuels can weaken the binder within the asphalt mixture, leading to premature cracking and degradation. De-icing salts can also contribute to material breakdown.

Understanding Fahrbahnabsorption is crucial for selecting appropriate pavement materials and for developing effective maintenance strategies. In areas prone to spills or heavy use of de-icing agents, pavements with lower absorption properties might be preferred. Conversely, for stormwater management purposes, controlled absorption is a desirable characteristic. Research continues to explore new materials and treatments to optimize Fahrbahnabsorption for different environmental and functional requirements.