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Open gabled house with slag-studded walls stands on slag rubble in a white exhibition space

Four construction drawings: elevation, section, three-dimensional model and floor plan of the house

Haus aus Schlacke

Institute of Contemporary Art, Dunaújváros (ICA-D), Hungary, 2016
In collaboration with the Goethe-Institut Budapest, Hungary


A walk-in object, 3.5 m high and 3.8 m wide, in the form of a house built of blast furnace slag blocks, with two façades and a gable roof. The house, with a total weight of 6 t, stands at the centre of the exhibition space, whose floor is likewise covered with slag blocks stacked 15 cm high. Slag, originally a waste product of local steel production, has become a particularly durable recycled material thanks to modern processing techniques.


To achieve the exact shape of the walls and roof as well as smooth wall surfaces, an inner and an outer timber formwork were made. Cement mortar and slag were placed into it in a process similar to casting. Internal steel reinforcement makes possible both the roof shape and the complete opening of the structure on two sides.


Germany and Hungary face the same challenges of structural change. To highlight this parallel, the second part of the exhibition sets photographs of the Völklinger Hütte in Saarland against Haus aus Schlacke.

Plan of Haus aus Schlacke with steel columns on the lower floor.

Four construction drawings: elevation, section, three-dimensional model and floor plan of the house

Haus aus Schlacke

Institute of Contemporary Art, Dunaújváros (ICA-D), Hungary, 2016
In collaboration with the Goethe-Institut Budapest, Hungary


A walk-in object, 3.5 m high and 3.8 m wide, in the form of a house built of blast furnace slag blocks, with two façades and a gable roof. The house, with a total weight of 6 t, stands at the centre of the exhibition space, whose floor is likewise covered with slag blocks stacked 15 cm high. Slag, originally a waste product of local steel production, has become a particularly durable recycled material thanks to modern processing techniques.


To achieve the exact shape of the walls and roof as well as smooth wall surfaces, an inner and an outer timber formwork were made. Cement mortar and slag were placed into it in a process similar to casting. Internal steel reinforcement makes possible both the roof shape and the complete opening of the structure on two sides.


Germany and Hungary face the same challenges of structural change. To highlight this parallel, the second part of the exhibition sets photographs of the Völklinger Hütte in Saarland against Haus aus Schlacke.

Plan of Haus aus Schlacke with steel columns on the lower floor.

Four construction drawings: elevation, section, three-dimensional model and floor plan of the house

Haus aus Schlacke

Institute of Contemporary Art, Dunaújváros (ICA-D), Hungary, 2016
In collaboration with the Goethe-Institut Budapest, Hungary


A walk-in object, 3.5 m high and 3.8 m wide, in the form of a house built of blast furnace slag blocks, with two façades and a gable roof. The house, with a total weight of 6 t, stands at the centre of the exhibition space, whose floor is likewise covered with slag blocks stacked 15 cm high. Slag, originally a waste product of local steel production, has become a particularly durable recycled material thanks to modern processing techniques.


To achieve the exact shape of the walls and roof as well as smooth wall surfaces, an inner and an outer timber formwork were made. Cement mortar and slag were placed into it in a process similar to casting. Internal steel reinforcement makes possible both the roof shape and the complete opening of the structure on two sides.


Germany and Hungary face the same challenges of structural change. To highlight this parallel, the second part of the exhibition sets photographs of the Völklinger Hütte in Saarland against Haus aus Schlacke.

Plan of Haus aus Schlacke with steel columns on the lower floor.

Four construction drawings: elevation, section, three-dimensional model and floor plan of the house

Haus aus Schlacke

Institute of Contemporary Art, Dunaújváros (ICA-D), Hungary, 2016
In collaboration with the Goethe-Institut Budapest, Hungary


A walk-in object, 3.5 m high and 3.8 m wide, in the form of a house built of blast furnace slag blocks, with two façades and a gable roof. The house, with a total weight of 6 t, stands at the centre of the exhibition space, whose floor is likewise covered with slag blocks stacked 15 cm high. Slag, originally a waste product of local steel production, has become a particularly durable recycled material thanks to modern processing techniques.


To achieve the exact shape of the walls and roof as well as smooth wall surfaces, an inner and an outer timber formwork were made. Cement mortar and slag were placed into it in a process similar to casting. Internal steel reinforcement makes possible both the roof shape and the complete opening of the structure on two sides.


Germany and Hungary face the same challenges of structural change. To highlight this parallel, the second part of the exhibition sets photographs of the Völklinger Hütte in Saarland against Haus aus Schlacke.

Plan of Haus aus Schlacke with steel columns on the lower floor.

White exhibition room with steel columns, trestle table and a projector under the ceiling

Lower floor with bench and video projection of a blast furnace with fire, along with cardboard packing boxes with photographs of simple buildings from various cultures as part of the exhibition (not shown).

Trestle table with lumps of stone in front of a wall with plans, beside it an orange glowing sphere

White exhibition room with steel columns, trestle table and a projector under the ceiling

Lower floor with bench and video projection of a blast furnace with fire, along with cardboard packing boxes with photographs of simple buildings from various cultures as part of the exhibition (not shown).

Trestle table with lumps of stone in front of a wall with plans, beside it an orange glowing sphere

White exhibition room with steel columns, trestle table and a projector under the ceiling

Lower floor with bench and video projection of a blast furnace with fire, along with cardboard packing boxes with photographs of simple buildings from various cultures as part of the exhibition (not shown).

Trestle table with lumps of stone in front of a wall with plans, beside it an orange glowing sphere

The project was realised as part of the “Ortsgespräche” initiative, which, under the direction of the Goethe-Institut in Hungary, addresses Europe, structural change and the promotion of culture on the periphery. The photographs are shown under “Völklinger Hütte”.


Participants from Hungary:

Organisation: ICA-D; structural engineering: M. Eng. Tibor Tóth; timber construction/formwork: János Szöllösi; steel construction/reinforcement: László Bazsó


Participants from Germany:

Structural consultancy: Dipl.-Ing. Walter G. Schachl, Munich, and Dipl.-Ing. Mathias Widmayer, Stuttgart, Germany


Photography: Völklinger Hütte

Haus aus Schlacke on a slag floor, front view.

View through the open front of the house, steel cables stretched beneath the gable

The project was realised as part of the “Ortsgespräche” initiative, which, under the direction of the Goethe-Institut in Hungary, addresses Europe, structural change and the promotion of culture on the periphery. The photographs are shown under “Völklinger Hütte”.


Participants from Hungary:

Organisation: ICA-D; structural engineering: M. Eng. Tibor Tóth; timber construction/formwork: János Szöllösi; steel construction/reinforcement: László Bazsó


Participants from Germany:

Structural consultancy: Dipl.-Ing. Walter G. Schachl, Munich, and Dipl.-Ing. Mathias Widmayer, Stuttgart, Germany


Photography: Völklinger Hütte

Haus aus Schlacke on a slag floor, front view.

View through the open front of the house, steel cables stretched beneath the gable

The project was realised as part of the “Ortsgespräche” initiative, which, under the direction of the Goethe-Institut in Hungary, addresses Europe, structural change and the promotion of culture on the periphery. The photographs are shown under “Völklinger Hütte”.


Participants from Hungary:

Organisation: ICA-D; structural engineering: M. Eng. Tibor Tóth; timber construction/formwork: János Szöllösi; steel construction/reinforcement: László Bazsó


Participants from Germany:

Structural consultancy: Dipl.-Ing. Walter G. Schachl, Munich, and Dipl.-Ing. Mathias Widmayer, Stuttgart, Germany


Photography: Völklinger Hütte

Haus aus Schlacke on a slag floor, front view.

View through the open front of the house, steel cables stretched beneath the gable

The project was realised as part of the “Ortsgespräche” initiative, which, under the direction of the Goethe-Institut in Hungary, addresses Europe, structural change and the promotion of culture on the periphery. The photographs are shown under “Völklinger Hütte”.


Participants from Hungary:

Organisation: ICA-D; structural engineering: M. Eng. Tibor Tóth; timber construction/formwork: János Szöllösi; steel construction/reinforcement: László Bazsó


Participants from Germany:

Structural consultancy: Dipl.-Ing. Walter G. Schachl, Munich, and Dipl.-Ing. Mathias Widmayer, Stuttgart, Germany


Photography: Völklinger Hütte

Haus aus Schlacke on a slag floor, front view.

View through the open front of the house, steel cables stretched beneath the gable

Wall of slag blocks and mortar after removal of the formwork.

Close-up of the wall, coarse lumps of slag in light layers of mortar

Wall of slag blocks and mortar after removal of the formwork.

Close-up of the wall, coarse lumps of slag in light layers of mortar

Wall of slag blocks and mortar after removal of the formwork.

Close-up of the wall, coarse lumps of slag in light layers of mortar

Wall of slag blocks and mortar after removal of the formwork.

Close-up of the wall, coarse lumps of slag in light layers of mortar

Fig. right: Structural drawings of the building and research photographs of slag blocks.

Fig. below: Ground floor, ICAD exhibition space featuring photographs of the former ironworks and the UNESCO World Heritage Site “Völklinger Hütte” as part of the exhibition.

Table with plans spread out, black-and-white photographs of slag heaps and a lump of slag

Fig. right: Structural drawings of the building and research photographs of slag blocks.

Fig. below: Ground floor, ICAD exhibition space featuring photographs of the former ironworks and the UNESCO World Heritage Site “Völklinger Hütte” as part of the exhibition.

Table with plans spread out, black-and-white photographs of slag heaps and a lump of slag

Fig. right: Structural drawings of the building and research photographs of slag blocks.

Fig. below: Ground floor, ICAD exhibition space featuring photographs of the former ironworks and the UNESCO World Heritage Site “Völklinger Hütte” as part of the exhibition.

Table with plans spread out, black-and-white photographs of slag heaps and a lump of slag

Fig. right: Structural drawings of the building and research photographs of slag blocks.

Fig. below: Ground floor, ICAD exhibition space featuring photographs of the former ironworks and the UNESCO World Heritage Site “Völklinger Hütte” as part of the exhibition.

Table with plans spread out, black-and-white photographs of slag heaps and a lump of slag

©

2026

Markus Heinsdorff Copyright.

©

2026

Markus Heinsdorff Copyright.

©

2026

Markus Heinsdorff Copyright.

©

2026

Markus Heinsdorff Copyright.