APT Testing of Modular Pavement Structure ‘Rollpave’ and Comparison with conventional asphalt motorway structures

This paper describes the Accelerated Testing with the LINTRACK-facility of the innovative ‘Rollpave’ test pavement that was developed within the theme ‘Modular Pavement Structures’ of the project ‘Roads for the Future’ of the Dutch Ministry of Transport, Public Works and Water Management. The concept of ‘Rollpave’ is a thin pre-manufactured asphalt wearing course that is rolled on a reel. On site, after unrolling this asphalt layer is bonded to the underlying asphalt through a new sophisticated technique based on electromagnetic waves. In the test pavement this pre-manufactured wearing course was constructed over 120 mm ScorepaveM (an asphalt mix containing modified bitumen and partially steel slags), resting on 120 mm conventional asphalt and 250 mm cement-bound asphalt granulate base over the sand subgrade. In the main wheel track of the test pavement 500,000 75 kN wide base tyre load repetitions (with lateral wander) have been applied and in the edge track, just along the longitudinal joint between 2 wearing course strips, 20,000 canalised 75 kN wide base tyre load repetitions. The load repetitions were applied divided over 3 pavement temperature conditions (‘winter’, 20oC and 40oC) that are representative for the winter, spring and autumn, and summer in the Netherlands. During the very heavy loading the development of rutting was regularly measured and some typical results, both for the main wheel track and for the edge track, are included in the paper. A superior rutting behaviour of the ‘Rollpave’ test pavement reveals from a comparison with 6 earlier tested asphalt motorway test pavements with only or mainly conventional asphalt mixes. APT Testing of Modular Pavement Structure “Rollpave” and Comparison With.... 3