Enhancing the damping properties of cement mortar by pretreating coconut fibers for weakened interfaces

Pretreated coconut fibers can be applied as renewable damping components in fiber-reinforced cement mortars to reduce the adverse effects of vibration and promote recycling waste fibers. In this study, FT-IR, TG, XRD, SEM measurements were performed analyze morphologies physicochemical properties before after pretreatment. The compressive strength, porosity, tested study fiber pre-treatment on mechanical mortar. contrast original fibers, pretreated induced a moderate air-entraining effect mortars. Therefore, with exhibited significantly lower strength loss, indicating consistency porosity results. Furthermore, by adding 0.75 vol% mixed solution NaOH H2O2, loss tangent mortar increased 25%. enhanced attributed weakened interface between matrix, which facilitated dissipation energy. Moreover, simplified shear-lag model was proposed describe relationship frictional sliding