Factors influencing the mechanisms of self-healing of cementing materials. Review

Concrete is a material in high demand in the construction industry for the creation of load-bearing structures. The weak point in the characteristics of concrete is the occurrence of microcracks. This article examines and evaluates the methods used to produce self-healing material, with a focus on factors affecting the mechanisms of autogenic healing and bacterial-based healing. Various parameters, including bacterial type, pH, temperature, nutrients, urea and Ca2+ bacterial concentration and application, pre–cracking, healing conditions, cement type, and crack width, are all important for healing effectiveness, although the use of water to facilitate both the autogenic and ureolytic mechanism of bacterial healing is of paramount importance for starting the healing processes. This study presents in detail various factors and their relationship with the healing mechanisms of autogenic healing and healing by ureolytic bacteria.

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