1. The materials

1.1 Concrete

Concrete is defined by standard NF EN 206/CN. It is composed of a mixture of cement, sand, gravel, water, and possibly additives whose properties are developed by hydration of the cement.

1.1.1 Resistance classes

Concrete is a material that resists compression very well. That's why one of its main mechanical characteristics is its compressive strength.

However, when we plot the compressive strength versus time curve, we see that there is no asymptote. In fact,...