Dr Ena Lloret-Fritschi research's construction processes in architecture at the interface between architecture and digital fabrication. She is particularly interested in exploring the architectural potentials of concrete and earth-based construction materials and their synthesis in new technologies. In 2022, Ena joined the academy of Architecture in Mendrisio (ARC USI) to establish the Fabrication- & Material-Aware Architecture group. Her research targets to provide architects and builders with design tools and processing methods that enable them to build with less waste and less materials - thus developing design and processing strategies that lower the CO2 footprint of our built structures. In addition, she is a principal investigator within the NCCR Digital Fabrication DFAB, focusing on sustainable concrete construction. Before her academic career, she worked as an architect in offices like OMA, in the Netherlands, Dietrich Untertrifaller, Austria and as an independent architect, where she received several prizes. She holds a master's degree in Architecture from the Architectural Association London and a PhD from ETH Zurich (2018).

Dr. Selen Ercan Jenny is a trained architect and a digital fabrication researcher. Her research focus has revolved around on-site robotic fabrication, leading projects such as the Mobile Robotic Tiling - a project that aims to bring research to its industrial application. Since June 2018, she is a PhD researcher at ETH Zurich as part of an interdisciplinary construction robotics team, which operates at the meeting point of architecture, construction, sensing and robotics. Her research focus is on developing an innovative additive manufacturing technique, Robotic Plaster Spraying (RPS) - a thin-layer, high resolution, spray-based, vertical printing-in-motion approach - for automating plastering on-site, in one integrated step, without the use of additional formwork or support structures or any subtractive steps (i.e. troweling for shaping or smoothing), minimising waste.

David Jenny is a practising architect and researcher focusing on digital fabrication and computational design methods. He is a senior research associate at the Centre for Building Technologies and Processes, Zurich University of Applied Sciences. He holds an MSc in Architecture from ETH Zurich, where his diploma project on algorithmic methods for housing design was awarded the SIA master prize. He has worked in architectural offices in Switzerland and Japan and as a researcher at the Future Cities Laboratory, in Singapore. From 2015-2021 he was part of Gramazio Kohler Research at ETH Zurich, responsible for courses in the Architecture curriculum, leading the teaching projects of the post-graduate program MAS ETH in Digital Fabrication.

About the Guest-Editors 5
Ena Lloret-Fritschi, Selen Ercan Jenny and David Jenny

Introduction A New Future of Construction Digital Fabrication and Sustainability 6
Ena Lloret-Fritschi, Selen Ercan Jenny and David Jenny

The Sustainable Lightness of Digital Fabrication 14
Mario Carpo

Sustainable Digital Concrete Myth, Reality or Emerging Opportunity? 22
Timothy Wangler, Yamini Patankar and Robert J Flatt

Injection 3D Concrete Printing From Structural Geometry to Fabrication 30
Norman Hack, Harald Kloft, Inka Mai, Pierluigi D'Acunto, Yinan Xiao and Dirk Lowke

Optimising Concrete Slabs with Paper Formworks 40
Fabio Amicarelli and Ena Lloret-Fritschi

Towards a Sustainable 3D-Concrete-Printed Architecture Assemblies, Detailing and Ornamentation 48
Ana Anton and Benjamin Dillenburger

Reimagining Earthen Materials The New Era of Sustainable and Digital Construction 56
David Jenny, Fabio Gramazio and Matthias Kohler

Scalable Equals Sustainable The Infrastructural Imperative of Earthen Construction 64
Jelle Feringa

Hybrid Earth-Timber Floor Slabs Scaling Circular, Low-Carbon Construction Through Automation 70
Tobias Bonwetsch and Tobias Huber

Look Down Not Up! Solving the Building Industry's Wasteful Conundrum with Digital and Earthen Construction 78
Sasha Cisar

Disused Concrete, Digital Acupuncture and Reuse 88
Corentin Fivet, Stefana Parascho, Maxence Grangeot and Malena Bastien-Masse

Knowledge Production in Digital Design and Fabrication 98
Romana Rust and Inés Ariza

Rethinking Digital Construction A Collaborative Future of Humans, Machines and Craft 108
Daniela Mitterberger and Kathrin Dörfler

Sustainable Construction Through On-site Robotic Fabrication Past and Future Concepts 118
Selen Ercan Jenny and Abel Gawel

Concrete Patents Innovative Building Materials and Construction Processes 126
Silke Langenberg, Sarah M Schlachetzki and Robin Rehm

From Another Perspective Monitor 134
The Rebis Wall Neil Spiller

Contributors 142