RESEARCH ON THE USE OF SELF-HEALING CONCRETE

Abstract

Concrete is currently the main man-made structural building material. It takes on extreme loads, undergoes periodic processes of freezing and thawing, which affects its integrity and, as a result, the process of cracking is observed. A promising direction of development in improving the performance properties of concrete is the use of self-healing elastic concrete, which allows increasing the strength characteristics of the concrete structure and preventing corrosion of the reinforcing elements. The article discusses the technology for the production of self-healing concrete, indicates the necessary conditions for self-healing and defines the features of its application. Also, the calculation of production costs was made and the economic effect from the basic version of the production of self-healing concrete was calculated, the relationship between the service life and cost was determined using the correlation method. As a result of the work, it was confirmed that the new method of self-healing has the prospect of implementation and is more effective in places where the production of repair work, and regular inspection of the condition of structures, in practical terms, is impossible: underground construction, underwater construction, high-rise buildings, bridge-type transport structures. The use of self-healing concrete ensures the preservation of the bearing capacity of concrete and reinforced concrete structures, which significantly increases the service life without damage and equally helps to reduce additional material costs for maintaining the facility. The same research method revealed that bio-concrete with the use of Bacillus subtilis bacteria allows reducing the level of environmental pollution by minimizing hydrocarbon emissions during the preparation of the mixture.