Holcim Foundation


“Use materials in the way they want to work”

Philippe Block in L’Architecture d’Aujourd’hui (AA)

Philippe Block appropriates the past and incorporates parametrics in manner far beyond aesthetics. He utilizes modern technology, software and digital fabrication tools, to re-explore historic construction techniques and generate new types of forms. In his interview with L’Architecture d’Aujourd’hui (AA magazine), he explains how circular construction economy strategies should build for longevity and adaptability – while at the same time reducing the volume and embodied carbon coefficient of the materials used.

Philippe Block – “Innovation in structures and materials offer important opportunities to address the pressing challenges of the environmental crisis. As a major negative contributor, the building industry must propose solutions to reduce greenhouse-gas emissions, resource depletion and waste. Embodied emissions remain the primary bottleneck, particularly for long-span and high-rise construction. These result from the sourcing, producing, forming, transporting, demolishing and disposing of building materials and components.

Two extreme strategies could be imagined to reduce the impact of building structures and materials on the environment. One could build for longevity, for future adaptability in use so that buildings do not grow obsolete.

Alternatively, one could build with the least impact, which means reducing the volume and the embodied carbon coefficient of the materials used.

Striatus_BRG-ZHA_naaro_8.jpgIdeally, both can be achieved by developing circular construction economy strategies. Significant improvements can be obtained by achieving strength through the structure’s geometry (rather than through material quantities) or by using materials in the way they want to work. The former refers to material efficiency that optimized shapes, such as doubly curved shells, offer to carry loads. The latter, conversely, refers to material effectiveness, since lighter is not necessarily better if it demands high-strength, heavily polluting materials. But, to achieve the efficiencies that the structural geometries offer, one needs to find, develop, and integrate fabrication and construction strategies in the design process to realize those non-standard forms in an economically viable way without producing excessive waste.

Education has an extremely important role to play as part of this paradigm shift. It is no longer useful to teach in the typical ways, which can result in students lacking a fundamental knowledge of engineering or designing without understanding material repercussions. We need new professionals who are more integrative, who understand collaborative design and construction processes in a holistic manner. I hope that the next generation of innovative designers is hands-on and responsible. We need to cultivate an entrepreneurial character in our students, helping them to become professionals who are curious and who want to move beyond existing codes and structures in innovative, sustainable ways. Finally, the concept of the single Master Builder or genius architect may have made sense in the past, but with today’s expectations, complementary and synergistic skills are needed as part of a team. If we can help give our students tools to grow into these shifting roles, I am confident they will rise to the task.”

Philippe Block is Professor of Architecture & Structure, Department of Architecture, ETH Zurich; Co-director of the Block Research Group; member of the Board of Directors of Holcim Ltd; and a member of the Academic Committee of the Holcim Foundation.

Read more in:

‘A’A’ presents LafargeHolcim Awards Prize Winners | Next Generation

Last Updated: July 28, 2021
Article Details
Zurich, Switzerland
Related Information
Related News
Striatus: The first-of-its-kind 3D concrete printed bridge
Striatus: The first-of-its-kind 3D concrete printed bridge

Striatus is an arched, unreinforced masonry footbridge composed of 3D-printed concrete blocks assembled without mortar. The 16x12-metre…

Related People
Philippe Block
Philippe Block

Philippe Block is Professor of Architecture & Structure, Department of Architecture, ETH Zurich; Co-director of the Block Research Group;...

Holcim Foundation

Search Help

Our website search engine covers the web pages including project descriptions and expert profiles, PDFs, images and videos on the Holcim Foundation website. To improve your search results, here are some tips:

Basic search

Our search defaults to term-pairing AND. If you search sustainable construction - then the search engine will look for any items containing sustainable AND construction


photovoltaic OR solar

Looks for either word


(clay OR mud) AND (school OR university)

Combine alternative terms for more specific searching


geothermal -heating

Excludes a term from results, automatically ANDs other terms listed


"zero carbon"

Use quotation marks to search for a specific phrase or combination

Wildcards (one or more characters)


Asterisk (*) matches any word or phrase - so archit* will find architect, architecture, architectural as well as architrave