Is this related to the technique that this group recently claimed to have rediscovered: https://www.sciencenews.org/article/chemists-long-lasting-roman-concrete

Is this related to the technique that this group recently claimed to have rediscovered: https://www.sciencenews.org/article/chemists-long-lasting-roman-concrete https://www.sciencenews.org/article/chemists-long-lasting-ro...? Although that is more about much longer lasting concrete: > Masic and his colleagues were trying to re-create an ancient Roman technique for making concrete, a mix of cement, gravel, sand and water. The researchers suspected that the key was a process called “hot mixing,” in which dry granules of calcium oxide, also called quicklime, are mixed with volcanic ash to make the cement. Then water is added. > Hot mixing, they thought, would ultimately produce a cement that wasn’t completely smooth and mixed, but instead contained small calcium-rich rocks. Those little rocks, ubiquitous in the walls of the Romans’ concrete buildings, might be the key to why those structures have withstood the ravages of time.