Measurements and modeling of cement base materials deformation at early age: The case of sulfo-aluminous cement

Early-age volume variations of self-leveling mortar of sulfo-aluminous cement base are evaluated in an endogenous configuration and during the drying process. Two displacement measuring techniques are used: a classical method using displacement sensors and a more original one using digital 3-D image correlation. The latter technique reveals itself to be very useful in measuring shrinkage and swelling as soon as the screed is poured. An advanced hydromechanical modelization confirms on the one hand the amplitude of the deformations measured by digital 3-D image correlation and underlines on the other the importance of Young's modulus concerning this amplitude.