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A new material developed at EPFL could change how we make cement forever - and cut 500 million tons of emissions by 2030.

After extensive analyses, researchers found the cause of the concrete scandal in County Donegal, Ireland, where structural damage has been causing red faces and protests for years: Concrete walls of thousands of houses are riddled with cracks, necessitating expensive repairs or even demolition. For the longest time, an excessively high mica content in the concrete was thought to be the reason.

To be more sustainable, the construction industry needs reliable service-life predictions for structures. Ueli Angst calls for a paradigm shift in forecasting the durability of reinforced concrete. The construction industry is experiencing a revolution, with digitisation, decarbonisation and robotics-assisted fabrication all having a lasting impact on practice and research.

In his PhD thesis, EPFL researcher Martí Bosch proposes a method for spatially quantifying the impact of mitigation measures - planting green spaces and using different building materials - on the urban heat island effect. During hot weather, cities are warmer than the surrounding rural areas. This well-known phenomenon - known as the urban heat island effect - is particularly acute at night when concrete and asphalt release the heat stored up during the day.

Researchers at EPFL have developed a method that uses artificial intelligence to design next-generation heat-pump compressors. Their method can cut the pumps' power requirement by around 25%. In Switzerland, 50-60% of new homes are equipped with heat pumps. These systems draw in thermal energy from the surrounding environment - such as from the ground, air, or a nearby lake or river - and turn it into heat for buildings.

Heavy rainfall can cause flash floods in urban areas. While data from flood events is required to model such phenomena, water levels and discharges are not routinely measured above ground. Eawag now plans to make use of widely available images and videos to estimate these values. We are all familiar with the chaotic scenes caused by torrential rain in towns - roads turned into raging rivers and sewers overflowing, unable to cope with the volume of water running off streets, squares and rooftops.

01. All wood, no beams: the cantonal parliament in Lausanne, which is currently being rehabilitated, will be roofed using new wood construction technology researched and developed at EPFL.

Statistics show that urbanites travel thousands of miles during their leisure time. Is it an urgent need for greenery?

Engineers have developed a new imaging technique that lets them see the insides of massive concrete bridges. Much like a sonogram, this technique provides quick, easy-to-interpret images, so that the health of these expensive structures can be assessed and monitored. The patient weighs several tons and is hundreds of meters long.