Akın, Arife2024-11-202024-11-202022978-975-8062-46-1https://hdl.handle.net/20.500.13091/6650In this study, the effects of nano-sized modified silica applied during the curing phase on the self-healing behavior of cementitious composites (ECC) with early and late ages pre-cure times were investigated. In the experiments, four different ECC mixtures were produced by using two different types of fly ash as a cement substitute in two different ratios. The samples were stored in a plastic bag under pre-curing conditions at early (7 day) and late (90 day) ages. After the precuring periods, half of the samples were damaged at a certain load level, and the other half was left sound. Half of the preloaded and sound samples were kept in 2% nano silica solution for additional periods of 7, 30, 60 and 90 days, and the other half in water for control purposes. After the given curing times, the change in mechanical properties was evaluated with the compressive strength test and the change in the void characteristics was evaluated with capillary water absorption tests. As a result of the experiments, it was concluded that the strength development and the capillary gaps and cracks of the specimens could be closed faster in the samples with early age pre-curing, and the self-healing behavior of the samples at early ages was more effective. In addition, it has been observed that nano silica curing application triggers an effective self-healing behavior compared to the traditional water curing method.eninfo:eu-repo/semantics/openAccessNano SilicaHigh Performance Fiber Reinforced Cementitious Composites (ECC)Early Age and Late Age Self-HealingConference Object