Objectives of Work Package 14

The motivation of this work package is to demonstrate the applicability and the advantages of innovative ultra compact fibre reinforced cementitious materials for the rehabilitation of highway structures. Conceptually, the very low permeability of ultra compact HPFRCC associated with their excellent mechanical properties can provide a long-term durability and thus avoid multiple interventions on structures during their service life. HPFRCC materials can be applied as thin watertight overlays, as repair layers from 30 to 100 mm thickness or as prefabricated elements such as curbs. They can also be applied in critical zones such as transitions from joints to the main structural elements, which are subjected to an aggressive environment and to significant mechanical stresses. This concept is illustrated in Figure below.

The objectives of this work package are to:

1. Demonstrate the applicability and advantages of ultra compact HPFRCC materials for the rehabilitation of concrete road infrastructure components (including aspects of global life-cycle-cost in relation to WP 12).

2. Make a first step towards the optimisation of these materials for maintenance.

3. Provide guidelines for the use of these materials and their further optimisation (conceptual design, numerical simulation tools, test methods, limit state criteria for design, etc.).

Conceptual approach for the application of ultra compact HPFRCC for the maintenance of reinforced concrete structures.

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