Investigation of drying shrinkage response in fibrillated microfiber reinforced preplaced concrete: experimental analysis and prediction models

This study aims to examine the drying shrinkage behavior of preplaced concrete reinforced with fibrillated microfibers through experimental analysis and predictive models. Two types of preplaced concrete mixes were formulated: normal preplaced aggregate and preplaced aggregate concretes with silica fume as partial replacement of cement. Each mix was prepared with three different percentages of fibrillated microfibers: 0%, 0.75%, and 1.0%. The experimental and analytical results of drying shrinkages were obtained for the fiber-reinforced preplaced aggregate concrete mixes with 0%, 0.75%, and 1.25% fiber contents. Six prediction models (ACI209R, EN1992, CEB/FIP, AASHTO, MC2010, and B3) were selected from literature. The study revealed that among the models, AASHTO and MC2010 models exhibited the highest accuracies, with prediction accuracies of 90%.