Concrete, hardened: Self desiccation

The scope is to describe and verify a test method for control of self desiccation for hardened concrete. The test method covers the determination of internal relative humidity (RH) in hardened concrete and cement mortar using RH instruments. The determination of RH is done on crushed samples of concrete or cement mortar. The test method is only for measuring equipment which gives off or takes up humidity to a limited extent, so that a stable RH value can be obtained within 24 hours.