Journal Press India^®

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Autogenous healing is mostly produced by continuous hydration or carbonation. In this investigation, the autogenous healing-induced fracture closure for young concrete will be quantified. Three different healing scenarios—water immersion, a humidity chamber, and wet/dry cycles—as well as two crack sizes—0.1 mm and 0.4 mm—were employed to measure the healing. The fracture closure was evaluated after 7, 14, 28, and 42 days of recovery. The internal state of the cracks was verified using phenolphthalein and visual inspection. The results show that whereas specimens housed in a humidity room did not show healing, specimens exposed to wet/dry cycles and water immersion completely sealed tiny fissures (under 0.15 mm). Although autogenous healing performed more quickly during wet/dry cycles, submersion had a bigger overall impact. But when the specimens’ interiors were examined, it became clear that the majority of the self-closing occurred on the surface and that carbonation in the crack faces was really only perceptible very close to the specimen’s surface. Additionally, a preliminary strategy to forecast fracture closure during autogenous healing in concrete is suggested by this work.

Keywords

Cement Concrete; Autogenous Healing; Compressive Strength

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