Experimental Research of Concrete Shrinkage Under Constraint Based on Capillary Tension Theory

In this work, a method based on the capillary tension theory is suggested for figuring out how much concrete will shrink while it is held in place by steel plates and studs. When concrete examples were restrained by steel plates of various thicknesses and materials with variations in their diameters, heights, and stud counts, the pore structure and shrinkage strain of the plates were examined. The findings demonstrate that steel plates and studs have a considerable impact on the pore structure of the specimens, and that as the plates and studs exert more constraint on the samples, the values of the pore structure parameters of the samples will grow linearly. Additionally, the coordinated deformation between the constrained parts that results from the decrease of capillary stress in the concrete would lessen specimen deformation and shrinkage. The purpose of this research is to provide recommendations for predicting shrinkage stresses in concrete that is supported by steel plates and studs.