Mortras and concretes are changing its voulume during setting and hardening. Many facors are influencing this mechanism:
temperature changes
drying
van-der Waals forces between the small high surface particles
growing and shape changing of crystals
volume change of the aggregates
...and some other known and also already unknown reasons
If the concrete is still in the fluid state, volume change dosn't matter. (maybe you get, due to the shrinkage, some percent less cubicmeters of concrete volume then ordered). If hardening begins, shrinkage and expansion will cause inner strains. If this strain is higher then the strength inner cracks or other may appear.
Schleibinger offers sveral instruments to measure this volume change from the early beginning with high precision.
Shrinkage
Mortras and concretes are changing its voulume during setting and hardening. Many facors are influencing this mechanism:
If the concrete is still in the fluid state, volume change dosn't matter. (maybe you get, due to the shrinkage, some percent less cubicmeters of concrete volume then ordered). If hardening begins, shrinkage and expansion will cause inner strains. If this strain is higher then the strength inner cracks or other may appear.
Schleibinger offers sveral instruments to measure this volume change from the early beginning with high precision.
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