A New Bridge Deck for the Kaag Bridges The First CRC (Compact Reinforced Composite) Application in Civil Infrastructure

Abstract

An existing azobé wood bridge deck was replaced by ultra high strength concrete (cube strength 180 MPa) panels. This paper deals with 2 bascule moving bridges in the A44 motorway near Sassenheim, The Netherlands. The longitudinal steel girders are spaced 685 mm apart. Each bridge deck consists of 4 panels 7.25 × 2.95 m. In order to keep the maximum weight under 170 kg/ m2 the CRC principle was used. This means very slender very high strength concrete construction parts combined with a high percentage of reinforcement. In this case the panels are 45 mm thick with 3 layers ∅8-40 mm reinforcement (5.6 %). The edges are 65 mm thick with 10% reinforcement.