The Anonymous Widower

How To 3D-Print Using Concrete!

All the 3D-printing I’ve seen has involved plastic, but Crossrail’s builders are using the technique to create complex shapes in concrete.

It’s all explained in this post on IanVisits, which is entitled How Crossrail Is Using 3D-Printing To Build Its Stations.

They don’t actually 3D-print the concrete, but a wax mould, that is then used to cast the actual piece required.

According to the post, the FreeFAB process has been used to create 1,400 unique moulds, which have then been used to create 36,000 different shaped concrete panels.

Ian’s post is a fascinating read and the mind boggles as to what will eventually produced using this technique.

September 29, 2017 - Posted by | Travel | , ,

2 Comments »

  1. I understand about the heat of concrete setting melting the wax, but why not cast in a box and pour sand around the outside of the wax mould at the same time as filling it with concrete. This would balance the load on the mould. After setting the sand could be poured off and re-used and the the wax melted off ditto,

    Comment by Mark Clayton | September 29, 2017 | Reply

    • It looks like they’ve spent a lot of time, effort and money getting the process right.

      Comment by AnonW | September 29, 2017 | Reply


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