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The age of concrete at loadingThe length of time under loadThe volume of Aggregate, VaThe thickness of the concrete elementThe relative humidity of the environmentVolume Changes of ConcreteCreep coefficienttebdcckkkkkVolume Changes of ConcretePartial creep factorskc= the relative humidity factorkd= a factor taking into account the age at which the concrete is loaded.kb= a factor taking into account the w/c and cement content of the concrete (same as for shrinkage)ke= a factor taking into account the effective thickness of the concrete element (Note: a different curve than for shrinkage)kt= a factor depending on the effective thickness and the time under load.Volume Changes of ConcreteCalc. effective thickness, emThe first step is to draw a sketch of the element, including the dimensions, direction of interest for the shrinkage calculation, and the direction(s) of drying.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 ConcreteCEB Creep, Kc
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