3d printing of The Arch of San Pedro de la Dueñas

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The Arch of San Pedro de las Dueñas at Spain’s National Archaeological Museum (MAN), reproduced by ACCIONA through 3D printing in concrete, opens the door to the future of conservation and the recovery of lost heritage

 

From the 12th Century to a state-of-the-art 3D printer. From Romanesque to a future where dissemination, restoration, conservation and recovery of historical and cultural heritage play their role. ACCIONA, in collaboration with the National Archaeological Museum (MAN) in Madrid, has achieved another milestone in heritage conservation through the perfect copying in concrete of the Romanesque Arch of San Pedro de las Dueñas (León, Spain), using 3D digitization and printing techniques. 

This emblematic architectural gem, now resting in the garden at MAN, is the first to be reproduced using the pioneering technique of 3D printing in concrete. An arch 2.2 meters high and 3.3 meters across opening the way to documenting and manufacturing exact replicas of pieces or fragments of work of historic value.


How did we build the innovative 3D Arch of San Pedro de las Dueñas?

1º. SCANNING THE MODEL

1º. SCANNING THE MODEL

We scanned the Arch of San Pedro de las Dueñas from a 3D model created in a computer, which allowed us to print it out in 3D later on.

2º. 3D PRINTING

2º. 3D PRINTING

Printing was through D-Shape 3D concrete printing technology. Using the features of the printer, and to facilitate the printing, we produced the arch in three parts: central arch, left columns and right columns.

With the intention of reproducing it realistically, as close as possible in both appearance and texture to the original arch, we chose concrete as the printing material. D-Shape technology allows complete freedom in terms of printing geometry from any 3D model.

3º. JOINING UP THE PIECES

3º. JOINING UP THE PIECES

The left- and right-hand columns faced each other, while the central part of the arch was positioned above with the aid of a crane. A jointing material was used to adhere the central arch and side columns.

4º. POST-TREATMENT

4º. POST-TREATMENT

We texturized the model to give it a realistic aspect and emphasized the final details, adding the capitals, made using high-resolution 3D printing techniques.


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