Case Study: New CTB at Paderborn Airport
With its 6-cylinder diesel engine, the new KMA 240(i) mobile cold recycling mixing plant can produce 240 tons of mix per hour from various construction materials. During rehabilitation of the apron as well as the refueling and deicing area at Paderborn-Lippstadt Airport, the requirements included the increased compressive strength of the new cement-treated base layer (CTB) in addition to a high mixing capacity.
In this project – one of its first real-world tests – the KMA 240(i) processed 5,500 tons of construction materials in only seven days, producing ready-to-pave mix in the process. Prior to this, the contractor, Oevermann, had already milled off the 15,000 m² tarred surface of the job site with a Wirtgen W 220(i) cold milling machine and stockpiled the removed material in an adjacent parking lot together with crushed limestone 0/5 that was being used as an additive. Both construction materials were fed by wheel loader into the hopper of the KMA at a ratio of 80% milled material to 20% limestone, where they were processed in the twin-shaft pugmill together with cement as the binding agent and water to produce a high-quality mix.