Concrete: many properties
Concrete is the most used construction material in the world. It plays a role in all sectors of construction, and its qualities and performance meet the varied needs of building construction and civil engineering while respecting the reuirements of safety, aesthetics and durability.
Concrete is obtained by mixing cement, water and aggregate. Its behaviour changes over time: initially it is fluid which enabls it to take any shape, later it becomes hard and extremely strong. Although it gives the impression of being simple and unsophisticated but in fact it is very complex with many qualities. It is combined with other materials, for example steel in the form of passive reinforcement or prestressing or fibres.