The major Dutch construction company, BAM Infrastructure, have collaborated with Eindhoven University of Technology (TU Eindhoven) to 3D print a concrete bicycle bridge spanning 8m and with a width of 3.5m. The proposed benefit is cost reduction and speed of construction. They have an ambition to 3D print concrete on site (this pioneering example was made off site). The Netherlands has strong reputations for both pioneering innovation in infrastructure engineering and being at the forefront of 3D printing. Read more about it here.
3D printing is fast becoming an established technology across all manner of engineering and manufacturing sectors. Whilst we're yet to print concrete, do take a look at the machines at our disposal in our lab.