Lecture
This lecture delves into the importance of water in concrete, discussing its role in the hydration process and the development of resistance. It covers topics such as the water-to-cement ratio, solid volume increase after hydration, and the impact of water on workability and mechanical strength. The instructor explains the chemical aspects of hydration, the rheology of concrete, and the consequences of using too much or too little water in the mixture. Additionally, the lecture explores different types of concrete used in Switzerland, their composition, testing requirements, and durability. Emphasis is placed on understanding the optimal water-to-cement ratio to avoid issues like cracks, segregation, and reduced resistance.