Lecture
This lecture covers the process of clay dehydroxylation, factors influencing calcined clay reactivity, calcination technologies, and the assessment of calcination quality. It emphasizes the importance of the correct firing window, the calcination temperature's impact on structural disorder, and the activation window for clay minerals. Various tests for reactivity, such as strength testing and the R3 test, are discussed. The industrial calcination process, including the firing temperature and quality assessment protocols, is also explained. Different calcination units, like rotary kilns and flash calciners, are compared. The lecture concludes with the issue of color in the final product and the significance of understanding the activation window for optimal calcination quality.