Self Healing of Concrete : A Review

[rami1976]

Self Healing of Concrete : A Review

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Concrete structures often suffer from cracking that leads to much earlier deterioration than designed service life. To prevent such deterioration, regular inspection of cracks in concrete structures and their repair are usually carried out by means of some kind of human intervention.
Once cracking occurs in reinforced concrete members, not only is the stiffness reduced but steel bars corrosion also occurs due to the permeation of rain and aggressive substances, reducing structural safety and serviceability. In order to avoid the dangerous situations caused by such deterioration, application of proper maintenance systems is required.
Self-healing, or autogenous healing, of concrete and reinforced concrete is a phenomenon that has been studied by various researchers. Reviews on healing of cracks can be found for example in Lauer & Slate (1956), Jacobsen et al. (1998) and de Rooij & Schlangen (2011).
Many experimental results and practical experiences have demonstrated that cracks in concrete have the ability to heal themselves, reducing water flow through cracks over time.

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