COMMENTARY
Modular steel used in a hilly environment
toned hues. Aside from the aesthetics, these finishes are non-toxic and they also add a layer of protection from weather and UV-rays.
To create the monolithic finishes, we also used natural mineral pigments, coloured/textured aggregates and form liners. With this, we did not require plastering, painting or skimmed coats, so there were no residues or particles that are washed off or flaked off. We also avoided unnecessary materials like anti-microbial paints because they can have a negative eco-toxicological effect on the environment. For the flooring, the natural stone finishes are extremely resistant to weathering so there was no need for additional treatment.
One problem with precast construction is, despite the fact that it expedites construction processes, the moulds often become unusable once the projects finish. This non-recyclability means that the method is not cost-effective and sustainable. This is a challenge yet to be solved but at least, on-site, we could use reusable form liners and pigmented concrete so there will be no need for plastering and painting.
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Image by nbuehler
To maximise the performance characteristics of the materials, 3D BIM modelling is necessary. It allows us to design and manufacture components with the greatest precision, as well as predict areas that require suitable tolerance. In establishing precast modules, we need to understand the connections and how each part is assembled in order to achieve maximum performance, including sturdiness and weatherproof quality. A large-scale project usually involves large components, which in some cases may need to be established on a constricted site. Therefore, the sequence of when each part comes together must be planned ahead of time.
All in all, the understanding of materials, technology and sustainable architecture could challenge the idea that today’s precast construction lacks of expression and artistry. Of course, some precast projects are motivated by the time and cost efficiency, but if we rethink the way we see the materials, the outcome will not be lacking expression.
MODULAR STEEL SYSTEM Guangzhou Gardens in China has a 3.5-kilometre elevated ‘tree-top
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