Metso’s IC process control proved to be an excellent tool when getting to grips with the crushing process. The team was already well familiar with the different on-screen buttons after just a couple of days.
Consisting of pieces of concrete, bricks, and fines, the feed was crushed in the jaws of the C96 jaw crusher at a setting of 90 mm. The mountains of iron waiting to be recycled were an indication of the huge number of reinforcing bars contained in the concrete.
The processing of concrete does not require high crusher or diesel engine capacity. Consumption during crushing was around 13 liters of fuel per hour.
Demolishing bridges and buildings
Every year, PR-Urakointi performs a large share of all the demolition contracts available in Finland. These also include demolishing buildings.
“It will be interesting to see how the Lokotrack can handle the concrete used in bridges, which is much harder than the concrete used in buildings. In addition to more reinforcing bars, bridge concrete can contain up to 50% natural stone,” says Tomi Inkinen from PR-Urakointi.
One bridge may easily contain up to 5,000 metric tons of concrete to be demolished. The Lokotrack enables crushing on site, which results in savings in transport costs.
“When you’re demolishing a bridge, you must always know what you’re doing. Each bridge is a different story. Sometimes you have to perform the demolition work while cars are using one of the lanes, which is a whole new challenge,” Tomi Inkinen says.