Paving work in the archipelago of Turku, Finland
We paved some of the Archipelago Trail in Iniö, Jumo, Nagu and Korpo in the archipelago of Turku. The work was a part of the more extensive paving contract for the Centre for Economic Development, Transport and the Environment of Southwest Finland (ELY Centre), contracted by Lemminkäinen. The renewed paving will make it easier for the residents, summerhouse dwellers and tourists to move around. At the same time, the repairs create savings in road maintenance.
Road maintenance requires pre-planning
"The trail is unique scenic motoring in Finland. It is extraordinary to be able to see the archipelago while driving; usually, you would have to take a boat cruise to see it. The road started to fall into disrepair with grooves and other damage. It would have been sufficient for driving for a while, but road maintenance always requires pre-planning. The Archipelago Trail was last paved in year 2000," says Tero Ahokas, Paving Engineer from the Centre for Economic Development, Transport and the Environment of Southwest Finland which manages the road.
A special worksite
Our work in the archipelago required thorough planning of ferry connections and double the number of trucks for material transport. The traffic on the Archipelago Trail is minor compared to the large highways in Southern Finland, but due to its location and beautiful nature, its workers considered the road a special worksite. Getting to the four sites requires at least one ferry ride from the mainland.
- In September–October 2016, we completed about 31 kilometres of new paving on the Archipelago Trail in the archipelago of Turku. About 22 kilometres were situated in Nagu and Korpo and the rest were located in Iniö and Jumo.
- We used about 26,300 tonnes of new paving on the road. In addition, we carried out about 4,500 cubic metres of soil exchange on the base of the road. For the new road base, we used 10,000 tonnes of mineral aggregates, most of which were transported to the islands from the mainland.
We used softer asphalt concrete (PAB) for the paving. It is excellent for roads with minor traffic. Due to the softer binder, the paving is more durable in terms of transformations caused by frost heaving and different soils.