Mechanics of durability of structural concrete: new approach to the phenomenon of degradation. Part 3. Integrated modeling of salt and carbonation damage

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Abstract

A rethinking and a new approach to the mechanics of durability is proposed to establish a systematic prediction and evaluation of the behavior of reinforced concrete structures as a function of time. Chemical-mechanical wear of cement materials over time due to a chemical reaction, the action of the environment and external load is described by physico-chemical models of reaction, transfer, destruction and their connection. In addition, the performance of concrete structures over time is discussed. The outlines of several representative research projects on durability mechanics are presented. Concrete is a material widely used in civil works and buildings that support people’s lives. The performance of concrete structures can be maintained for a long time if such structures are properly designed and built.

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About the authors

S. N. Leonovich

Belarusian National Technical University; Qingdao University of Technology

Author for correspondence.
Email: leonovichsn@tut.by

Doctor of Sciences (Engineering), Professor, Foreign Academician of RAACS

Belarus, 65, Nezavisimosti Prospect, Minsk, 220013; 266033, China, 11 Fushun Rd, Qingdao

References

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Supplementary files

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2. Fig. 1. Relationship between relative humidity and carbonation factor

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3. Fig. 2. Chloride condensation by carbonization (result of accelerated tests and carbonization analysis) [7]

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4. Fig. 3. Relationship between pH and carbonation factor [8]

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5. Fig. 4. Prediction of Cl- distribution for salt damage and carbonation

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6. Fig. 5. Cracking around a reinforcing bar

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7. Fig. 6. Time-dependent microcrack model (Rokugo K., et al. Test method for determining the tensile strain softening curve and fracture energy of concrete. 1989)

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8. Fig. 7. Air permeability coefficient of the concrete cover with a deformed core (Ujike I., Sato R. Deterioration of the integrity of surface concrete due to internal cracking around a deformed bar. Proceedings of the International Seminar on Durability and Life Cycle Assessment of Concrete Structure. 2006)

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9. Fig. 8. Multi-scale modeling of circuits and the life of materials and structures [22]

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