This preview shows pages 8–13. Sign up to view the full content.
Calculate the effective thickness on a unit volume (Vol.), perpendicular to the direction of shrinkage to be calculated, for a unit drying surface (S.A. exposed): (mm)exposedS.A.Vol.meVolume Changes of ConcreteEm for a wallVolume Changes of ConcreteEm for a slab on gradeVolume Changes of ConcreteFor circular or square column there is drying in 2-dimensionsexposedS.A.2Vol.me(mm)Volume Changes of ConcreteEm for square columnsVolume Changes of ConcreteGoing from 2-D to 1-D
This preview
has intentionally blurred sections.
Sign up to view the full version.
9Volume Changes of ConcreteEm for circular columnsFeb 3Volume Changes of ConcreteVolume Changes of Concreteshrinkage strain of the concrete, ecs, at a given age, t.tebccskkkWhere ec = ultimate shrinkage strain of the cement paste fractionkb= a factor taking into account the w/cm and cement content of the concreteke= a factor taking into account the effective thickness of the concrete elementkt= a factor depending on the effective thickness and the time of dryingVolume Changes of ConcreteCEB Shrinkage, ecpVolume Changes of ConcreteCEB Shrinkage & Creep, KbVolume Changes of ConcreteCEB Shrinkage & Creep, Ke