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Firm Experiments with Concrete Layers

Friday, September 29, 2017

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Founders of South Korean architecture firm STPMJ have taken the process of altering the constituents of concrete and turning the results into an exterior design.

Photos: Song Yousub / STPMJ

Founders of South Korean architecture firm STPMJ have taken the process of altering the constituents of concrete and turning the results into an exterior design.

Seung Teak Lee and Mi Jung Lim have created a pair of striped houses, named Stratum House, near the city of Icheon in an attempt to “simulate geological formation.”

“The project started with a curiosity of concrete composition, its casting process and reaction on the results from testing the changes of its constituents,” reads the duo’s website.

“Three constraints are applied, water-cement ratio, use of diverse aggregates and different amount of pigment.”

The walls were cast over the course of 22 days, according to reports, with a different layer added each day.

The first constraint, water ratio, impacted the shape of the stripes. The increased water produced looser concrete with a higher slump value, which produced layers with more even edges. The layers with less water in the mix had formed mounds in the pouring process, making those layers uneven.

Seung Teak Lee and Mi Jung Lim have created a pair of striped houses, named Stratum House, near the city of Icheon in an attempt to “simulate geological formation.”

The layers differ in texture as well, which is where the different aggregates—from fine to coarse—came into play. Last, the different tones were achieved by adjusting the pigment that was added to the mix.

“With the combinations of these three variables, shape, texture and color, the concrete of each different quality is cast on-site every day,” the architects said.

“It allows to have delicately designed divisions of stacked concrete layers showing time differences.”

   

Tagged categories: Building envelope; Cement; concrete; Exterior coatings; Pigments

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