Análise do potencial de autocicatrização de fissuras em misturas cimentícias

Abstract

Numerous problems that occur in civil construction are associated with the formation of cracks in structures, as these cause a reduction in the performance of buildings and require repairs and maintenance. However, maintaining structures requires high financial resources and, in cases of structures that are continually in service, this task can be even more challenging. Self-healing appears as an alternative to reduce this problem, as it is an area of research in civil engineering and construction materials that seeks to develop materials and techniques capable of automatically repairing cracks that may occur in concrete structures and other cementitious materials over time. Despite already having studies and a broad understanding regarding selfhealing, there are still challenges, such as the limitation and characterization of materials for this. This work proposes a bibliographical and systematic review, to identify the main techniques currently used in this area and thus provide an overview of the materials that have been most used. Through the systematic review, we searched for files that contained the word “self-healing” in two databases (Scopus and Web of Science), defining some criteria for a better filter in the files. With the help of VOSviewer, software that made it possible to map these files, maps were created with the most recurring words regarding self-healing techniques. Processes carried out by bacteria, self-healing through crystallizing additives, and self-healing with the addition of superabsorbent polymers were addressed, where it can be concluded that there are still obstacles to be overcome, such as the optimization of healing agent formulations and compatibility with different types of materials and environments.