CRCP Applications In Belgium: Recent Evolutions Towards An Optimised Cracking Pattern

Paper amd Presentation from by Luc Rens and Anne Beeldens from ASCP 4th Concrete Pavements 2017

The technique of continuously reinforced concrete for pavement construction is being applied in Belgium since the 1960s. The original design underwent several changes over time, sometimes for economic reasons but mostly in order to improve with success the long term behaviour of the pavements. The actual concept with active crack initiation over a reduced length and depth leads to an optimised cracking pattern. Different test sections have been installed and measured on site with positive results. Today, the active crack initiation is enforced by including it in the
Flemish standards for CRCP.

This paper presents the evolution of the design of CRCP in Belgium as well as the results of the test sections and field measurements. Discussion concerns the choice of steel reinforcement rate and lay-out and other possible measures for the optimisation of the crack pattern and CRCP performance, in particular the technique of active crack initiation.

Other fields of progress are the surface and texture characteristics of exposed aggregate concrete, both in single layer and double layer constructions. Modifications in the concept of double layered CRCP are presented.

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