Adsorption isotherms describe the relationship between the amount of a substance adsorbed onto the surface of a material and its concentration in the surrounding phase, at constant temperature. In the context of cement and concrete, understanding adsorption isotherms is critical for predicting how these materials interact with their environment. This interaction directly influences the durability, strength, and longevity of concrete structures, especially under severe environmental conditions. Adsorption isotherms help in modeling the moisture retention properties of concrete, as well as its ability to capture airborne pollutants and other deleterious substances that can lead to degradation.