Återvinning av tjärasfalt och krossad asfaltbeläggning vid motorvägsbygget på E4 vid Markaryd

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Torbjörn Jacobson

When building a new part of the E4 motorway in the south of Sweden between the years 2004 and 2006, 100,000 tons of reclaimed asphalt was used for recycling. The reclaimed asphalt material came from the former part of the E4 which had to be excavated when building the new motorway. At the northern part of the new motorway, 30.000 tons of asphalt containing tar was recycled with a cold recycling technique using foamed bitumen. At the southern part of the new motorway, 70,000 tons of crushed asphalt pavements were recycled without adding of new bitumen. In both cases the recycled materials were used as road base which replaced a conventional unbound road base of crushed aggregate with the identical thickness, 80 and 150 mm respectively. In this report there is a description of the planning of the work, guidelines for recycling asphalt containing tar, crushed asphalt, pre-sampling methods, testing of the compaction of full-scale constructions, control sections, quality control and monitoring of the completed motorway.

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