Förstärkning av vägkonstruktion med stålnätsarmering: 12 års uppföljning av väg E6 Ljungskile

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A motorway road section of 800 metre long of the road E6 south of Ljungskile in the Southwest of Sweden was seriously damaged due to low bearing capacity. Longitudinal and transversal cracks were frequently observed after about five year’s traffic. The road section was rehabilitated by milling away 80 millimetre and paving with new bituminous layers. Three full-scale, 100-metre test sections were built. Two test sections were reinforced with steel fabrics and one section without reinforcement as a reference section. These sections are instrumented with strain gauges. The section’s performance have been tested by deflection, strain and rut measurements and manual distress surveys. Degradation behavior of the test sections were numerically analyzed. This report presents pavement performance of the test sections after 12 years in-service. The reference section has shown extensive longitudinal cracks in the wheel paths. However, almost no cracks in the reinforced sections. It is concluded that the reinforcement had a significant influence (10–15%) in increasing the resistance of the test sections against fatigue cracking and in limitation of the rutting in pavement surface related to repeated-loading of the heavy vehicles.

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