Scientists and engineers in Austria have developed a new type of brick wall that can be taken apart and rebuilt again after a building is demolished.
The idea could help reduce construction waste and lower the environmental impact of the building industry, which is one of the world’s largest sources of greenhouse gas emissions.
The project, called Re-Use Ziegelwand, was led by researchers at Graz University of Technology together with Austrian brick manufacturer Wienerberger.
Today, many buildings are demolished after only 10 to 20 years of use, especially commercial buildings such as supermarkets and retail spaces.
When this happens, huge amounts of construction materials are thrown away, even though many of them are still in good condition.
Traditional brick walls are usually held together with mortar, making them difficult to separate without breaking the bricks.
The Austrian research team wanted to solve this problem by designing brick walls that could be reused several times. Instead of using permanent mortar joints, they created special reversible joints that allow the wall sections to be carefully dismantled and moved to another location.
According to the researchers, making bricks requires a lot of energy and raw materials. Reusing them instead of producing new ones could significantly reduce pollution and waste.
Project leader Hans Hafellner from TU Graz explained that the system could reduce carbon dioxide emissions by about 60% over three building life cycles compared to normal construction methods.
The reusable walls are prefabricated in factories before being transported to construction sites. Each wall is about 44 centimeters thick and contains insulating wool inside the bricks to help keep buildings warm in winter and cool in summer. The walls are also plastered at the factory, reducing the amount of work needed during construction.
One major challenge was ensuring the reusable walls remained strong, stable, and weatherproof while still being easy to dismantle later. The researchers developed two ways to stabilize the structure. In some cases, the roof itself can provide enough weight to hold the building together. In other cases, threaded steel rods running vertically through the bricks provide additional strength.
To test the system, the team built a demonstration building using the reusable walls. They later dismantled the structure and rebuilt it at another location. The building remained fully functional after reconstruction, proving that the concept works in real-life conditions.
The researchers also developed a way to monitor the health of the walls over time using vibration analysis. By measuring the walls’ natural vibration frequencies, engineers can detect whether the structure has weakened without needing to damage or dismantle the building for inspection.
Researcher Andreas Trummer from TU Graz said the successful testing showed that the reusable wall system is technically reliable and durable.
The team believes the technology could benefit both building owners and the environment. Buildings made with reusable materials may retain greater value after demolition because the components can be used again instead of becoming waste.
The project offers a glimpse into a future where buildings may no longer be treated as disposable structures, but as valuable collections of reusable materials.
