Clay-ver: from ground to building: an exploration of the use of excavated clay for the indoor climate in Göteborg and its application
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Examensarbete för masterexamen
Modellbyggare
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Humanity is facing one of the most crucial challenges ever known: tackle
global warming. Emissions from the construction field increase every year and
represent 39% of the overall CO2 emissions in Europe.
To reduce its impact, a building must not only achieve low operating energy
but also take into account the material’s low embedded energy, a high
circularity potential, and a healthy indoor climate. Aware of this, the city of
Göteborg has initiated a project to build a fossil-free preschool: the Hoppet
Project. Here, such as in many cities, a large amount of clay is excavated each
year for different buildings and infrastructure projects. While clay is a natural
material and a resource, it is considered as waste and must be cleared out of
the building site. An initiated project, “Recirculate”, aims to find new use for
that clay, and works in collaboration with the Hoppet project.
Within this frame, the objective of this master thesis is to highlight the potential
of excavated clay for the benefits of the indoor climate. Indeed, clay has always
been used and has very good properties which participate in low-tech climate
regulation. It wants to encourage the use of clay waste to build sustainable
buildings suitable for temperate and cold climates like Göteborg and to make
more reasonable use of resources.
Literature research, field tests, and case studies frame the potential use of clay
waste and its properties, with an emphasis on indoor climate. Based on this
exploration, a catalog of clay material solutions is compiled to show where
and how it can be used and to illustrate its aesthetic potential. This document
is then used to develop a generic design proposal, which is a testbed on the
Hoppet project. This testbed aims to explore possible clay implementations
in an adapted way for the indoor climate and to propose an answer to the
question. Finally, comparisons with the original hoppet materials show that
clay is relevant in a fossil-free and zero-emission concept.
Those elements are expected to be used references to promote these materials,
increase awareness, and inspire to build for sustainability.
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Ämne/nyckelord
Excavated clay: natural material: circular material, Health: indoor climate: testbed: preschool