A research team is seeking to shed light on previously unknown processes in the hydration of cement. By gaining a deeper understanding, the team aims to pave the way for low-carbon cements. The study, led by the University of Malaga, involves the French Université Grenobles Alpes, the European Synchrotron Radiation Facility (ESRF), which is also based in Grenoble, and the Paul Scherrer Institute.
The main drawback of the current proposals for low-carbon cements is the slow hydration kinetics in the first three days, according to a PSI statement. However, understanding the processes related to cement production as it takes place at its early stages is “crucial”, as Shiva Shirani, first author of the paper and PhD student at the University of Málaga, explains. “So, we have developed a methodology to get a full picture of the hydration of Portland cement,” she says.
The scientists combined complementary experimental approaches at the ESRF and PSI's Swiss Synchrotron Light Source. Near-field ptychotomography unveiled the hydration of commercial Portland cement, according to the statement.
“Understanding the mechanics of the slowest processes will hopefully lead to strategies to rationally accelerate the hydration of low-carbon cements,” commented co-author Professor Miguel A.G. Aranda. These might include faster strength-enhancing admixtures, “which are needed to timely remove the formwork". ce/mm
