🔬 Synchrotron Experiments: Imaging the Future of Sustainable Cement

Welcome to the core of the syn4cem project. Funded by the European Research Council (ERC), our research relies on the world’s most advanced synchrotron radiation facilities. By utilizing high-brilliance, coherent X-rays, we zoom into the first few hours of cement hydration at the nanoscale.

Our mission? To unlock the secrets of low-carbon, eco-friendly cement alternatives, capturing their chemical transformations in 4D (3D over time) to build a sustainable future.

💡 The Science Explained: Why Synchrotron X-Rays?

Portland cement, the most important constituent of traditional concrete is responsible for roughly 8% of global anthropogenic CO2 emissions. To curb climate change, the construction industry must transition to low-carbon alternatives, such as replacing traditional clinker with, for instance, abundant clay and limestone.

However, these low CO2 cements suffer from a major drawback: they harden too slowly in the first three days, making them difficult to use on fast-moving building sites.

To solve this, we cannot just look at cement after it has hardened; we need to watch it change live. Standard laboratory microscopes cannot see through dense cement pastes, nor do they have the resolution to see features smaller than a micrometer.

 🌠Enter the Synchrotron:

A synchrotron acts as an incredibly powerful microscope. By accelerating electrons close to the speed of light, it generates X-rays that are billions of times brighter than those used in hospitals.

• Unparalleled Spatial Resolution (<100 nm): Allows us to see sub-micron structures like C-S-H gel needles and the tiny "etch-pits" forming as cement dissolves.

• Rapid Temporal Resolution (<100 minutes): Allows us to take rapid 3D scans over time, creating a 4D movie of a single cement grain as it reacts with water.

By analysing these 4D movies, syn4cem is designing chemical accelerators that will make sustainable concrete harden just as fast as traditional concrete—removing the final barrier to its global adoption.