Creep and shrinkage of concrete
Creep and shrinkage of concrete are two physical properties of concrete. The creep of concrete, which originates from the calcium silicate hydrates (C-S-H) in the hardened Portland cement paste (which is the binder of mineral aggregates), is fundamentally different from the creep of metals and polymers.
Source: Wikipedia — Creep and shrinkage of concrete (CC BY-SA 4.0)