Fibre reinforcement for car parks

Car parks — from shopping centres to business parks — have their own loading profile: frequent start-stop movements, concentrated point loads when manoeuvring in and out of spaces, and often a desire for fast, cost-effective construction. Fibre reinforcement of both asphalt and concrete suits this well. This article discusses the application.

The loading profile of a car park

Unlike a through road, a car park experiences a great deal of localised, static loading: cars standing still for long periods, combined with concentrated turning movements when parking and pulling out. This combination of static loading and localised shear stress is a different type of loading from the even, continuous loading on a carriageway, and calls for a pavement that withstands point loads and cracking well at specific, repeatedly loaded spots.

Why fibre reinforcement in car parks?

• Resistance to point loads. Fibres distribute the stress from concentrated loads (for example at parking bays with heavy manoeuvring traffic) more evenly through the mix.

• Fewer joints with concrete. Fibre-reinforced concrete allows larger areas to be built with fewer shrinkage joints, which is relevant for laying out parking bays and routes.

• Faster, more cost-effective construction. For large parking areas — at shopping centres, distribution centres or park-and-ride sites — eliminating a separate reinforcement step delivers a significant saving in labour hours.

• Combination with sustainability requirements. More and more retail and property companies apply their own sustainability targets for new-build and renovation of car parks. Fibre reinforcement provides concrete arguments here, both through lower production temperatures (asphalt) and reduced steel use (concrete).

Asphalt or concrete for a car park?

Both materials are used, depending on the desired lifespan, appearance and budget:

• Fibre-reinforced asphalt is generally the faster, cheaper choice for large parking areas with regular passenger-car traffic.

• Fibre-reinforced concrete is more often chosen for heavier loading (for example lorry parking areas) or where a longer lifespan with less maintenance is desired, despite higher initial construction costs.

Practical considerations

• Marking and line-painting: with both materials, workability and surface texture matter for good adhesion of parking markings.

• Drainage: with open mixtures such as porous asphalt (ZOAB), good drainage is an advantage, although this is less common on regular car parks than on motorways.

• Maintenance-friendliness: a longer lifespan thanks to fibre reinforcement means less frequent (partial) closure of the car park for maintenance — relevant to the accessibility of shops or businesses.

In conclusion

For car parks with heavy concentrated loading and a need for fast, cost-effective construction, fibre reinforcement of both asphalt and concrete offers a direct