Aggregate Industries’ asphalt division have supplied their SuperFlex surface course for home delivery expert Arrow XL in Wigan to create a secure car park for both staff and visitors.

The project requirements initially called for 40mm of stone mastic asphalt (SMA) to be used in order to keep costs controlled.

However, Calco had concerns about a 40mm layer of SMA being a sufficient depth to avoid any potential delamination between the concrete and the newly laid surfacing.

Aggregate Industries’ SuperFlex is a highly durable surface course, which would be the best option to reduce the risk of reflective cracking and provide the high levels of durability required for a busy car park.

Calco refined the proposal of works to also include using a spray jet paving machine which would achieve a better bond via a continuous application of a hot, bituminous tack coat as the SuperFlex was laid in a single layer straight onto the Concrete.

Despite this fully tailored approach resulting in additional costs being forecast, the contract was awarded to Calco due to the quality and reliability of the finished surface meeting the high expectations of the client.

Aggregate Industries delivered 770 tonnes of SuperFlex AC10 surface course to site on schedule, with all particular logistical requests accommodated by Calco.