Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts
Pavers, kerbs and setts

Pavers, kerbs and setts

Highway components, which combine the qualities of modularity and resistance, are essentials on the reuse market. Contractors often recover reusable elements during roadworks. These are transported to their own stocks or to operators responsible for putting them on the market after cleaning and sorting. Some municipalities have their own stock of roadway materials. For example, in Paris it is obligatory to reuse suitable pavers in situ or divert them to a centralised stock from which contractors supply new developments. In 2015, over 4,100 tonnes of pavers were sorted for reuse.
Of the different types of paver, setts are recovered from roadworks in the largest numbers, and are therefore more readily available. As regards pavements, the current trend is to keep stone pavers in place or reinstall them in town centres. This type of paving is consequently rarer and more expensive.
As well as pavers, the reuse market offers kerbs, usually in blue stone or granite. They often come in different lengths. These kerbs can also be used for other purposes, such as stairs, landscaping features, bollards, etc.
There are also numerous clay pavers (“Dutch clinkers”) on the reuse market, especially in the Netherlands. This material is commonly used there, and the resale sector is highly developed. A study carried out in the Netherlands estimates that “clinkers” are reused on such a scale that the average life of these elements is 125 years (and over 250 years for almost 10% of the stock) - which generally exceeds the average life span of a highway development. Anecdotally, it is possible to find batches of reusable concrete pavers. Because of its low value, this product is rarely kept in stock by suppliers. When it is recovered, this is often for a just-in-time sale.

Common products

The most common products are:

  • Setts (porphyry, granite or sandstone): They often have a rectangular shape, with a width of a minimum 10 cm and a length between 13 and 15 cm.
  • Stone pavers (sandstone, more rarely blue stone): They are characterised by a square surface and reduced height.
  • Mosaic stones: Smaller and roughly cuboid, they are ideal for laying in a fan shape.
  • Kerbs: Blue stone, granite
  • Clay pavers (also known as “Dutch clinkers”): brown, mauve, yellow, different formats.
  • Concrete pavers: irregular supply.
  • Concrete slabs type "Stelcon": Available at a smalle number of dealers only, but the supply is stable.
     

Available treatments

The most commonly available treatments are:

  • Sawn finish for pavers: stone pavers can be sawn to give a perfectly flat upper surface. This treatment can double the price of the pavers, but provides users with greater comfort (persons with reduced mobility, cyclists, etc.). It must, however, be properly implemented to guarantee this even finish.
  • The pavers are usually sorted (according to size) and cleaned (of the remains of mortar, asphalt) by the dealers.
  • Ends of the kerbs: some dealers cut off the ends of the kerbs to facilitate their relaying.

Recorded prices

The prices given here are for professionals and are expressed not including VAT.

  • sorted porphyry setts 20 to 30 €/m²
  • porphyry pavers, mixture of shape and size: 15 to 20 €/m²
  • mosaic stones: 30 to 40 €/m²
  • sandstone paving slabs: 40 to 50 €/m²
  • unsawn bluestone kerbs: 27 to 30 €/m (sawn: +10€/m)
  • clay clinkers; 12 to 35 €/m²
  • concrete clinkers: 4 to 6 €/m²

Promoting reusable highway elements

It is relatively simple to promote reusable pavers or kerbs, in either a public or a private contract. Specialist suppliers are used to dealing with large orders. The execution methods are very similar to those for new pavers, but close attention should nevertheless be paid to a series of special points:

  • In the specifications, allow for some flexibility in the choice of materials. For example, if a specific format of paver is required, but it is not available on the market at the time of the work, the supply risks being complicated or expensive, whereas a cheaper batch of a slightly different format could be suitable for the same project.
  • Set out the degree of tolerance in relation to the appearance of the required material in the specifications. Pavers or kerbs with irregularities or traces of asphalt are perfectly suited to certain applications and are less expensive than a “first choice” product.
  • Take account of the variable length of the kerbs during the design and implementation stages.

For more detailed information, please refer to the sections of the specifications for pavers, kerbs and clinkers.

Did you know?

Porphyry pavers come from the Quenast and Lessine quarries in Belgium. These sites have produced millions of pavers for both the local and the export markets since the 18th century. However, the production of pavers stopped in the 1970s. It is now the reuse sector that keeps this product in circulation and makes it available for new highway projects. There is nothing exceptional about this practice, and numerous public contractors use this reusable material for highway projects.
The pink granite highway elements currently found on the reuse market in Belgium originate from Swedish quarries. These pavers and kerbs were used as ballast in the holds of the ships sailing between Belgium and Sweden. Once unloaded in the port towns, new uses were found for them in development projects for public spaces.

Below you can find extracts from the specifications for a series of reusable materials with a strong presence on the Belgian market that are easy to require within the framework of large projects or public contracts. These specification extracts were produced in close collaboration with the specialist dealers concerned.