Uniaxial deformation characteristics and mechanical model of microcapsule-based self-healing cementitious composite

Abstract

A physical triggered self-repairing cementitious composites were built using the microcapsules with the epoxy resin as the core. The influence of the microcapsules dosage, preloading stress and curing days on the uniaxial mechanical properties, pore structure parameters and self-healing efficiency were investigated. The microcapsules had a significant influence on the deformation characteristic to improve the brittleness characteristics and strengthen the ability of plastic characteristics. Microcapsules positively influenced self-healing but negatively affected the pore structure parameters of sound cementitious composites materials. Considering the influence of preloading stress, relationship models to quantitatively predict the influence of the microcapsule dosages on the mechanical properties and pore structure parameters were established, and obtained the statistical relationship between mechanical parameters and pore structure parameters, and so as to indirectly obtain the models among the mechanical parameters, microcapsules dosage, preloading stress and pore structure parameters.