Course Details

Theory of Durability and Concrete Rahabilitaion

Academic Year 2024/25

DJB050 course is part of 4 study plans

​ DKA-M Summer Semester 1st year

​ DPA-M Summer Semester 1st year

​ DKC-M Summer Semester 1st year

​ DPC-M Summer Semester 1st year

Failures and defects of building materials (design, documentation, realization) Evaluation of individual types of aggressive media and their effect on building materials (gases corroding concrete, determination of water aggressiveness on reinforced concrete structures, types of water corroding reinforced concrete structures, hygroscopic solid substances corroding concrete, mineral fats and oils, microbiologic effects influencing concrete corrosion). The mechanism of concrete destruction and the reinforcement corrosion (corrosion of metal inserts in concrete, cracks formation and shelling initiated by corrosion, corrosion of reinforced structures reinforcement by effect of vagabond currents, penetration of chlorides, carbonation, sulfating, galvanic corrosion, corrosion of prestressed ropes during additional prestressing ,effect of aggressive chemical substances, degradation by frost effect, calcareous expansion, magnesium expansion, alkaline reactions of aggregates, sulphates attack etc.) Effects of moisture. Heat effects. Load effects. Methods of concrete protection. Methods of reinforcement protection, Theory of concrete rehabilitation. Surface treatment – analyses, strategy, design. Demands onrepair materials and selection of these materials. Surface treatment.

Credits

8 credits

Language of instruction

Czech

Semester

summer

Course Guarantor

prof. Ing. Rostislav Drochytka, CSc., MBA, dr. h. c.

Institute

Institute of Technology of Building Materials and Components

Forms and criteria of assessment

examination

Entry Knowledge

Brief fundamentals of general physical chemistry concerning the state of matter, thermodynamics, reaction kinetics, processes on boundaries of phases, sorption processes and basic processes in disperse systems, pH value. Fundamentals of silicate chemistry concerning the structure of silicates, knowledge of concrete design proposals for in advance given final concrete properties, knowledge of input materials properties for concrete manufacture and concrete testing.

Aims

Introduction into problems of corroded buildings especially with regard to causes of failures, types of corrosive surroundings, to selection of adequate building materials. The lectures are oriented especially to explanation of chemical, microstructural and mechanical changes during corrosion, corrosion of reinforced concrete initiated by the effect of aggressive surroundings and to classification of materials according to durability. There are in detail discussed the corrosion of concrete, metals and building materials by liquid and gaseous media, the types of corroding water to reinforced structures and the influence of solid materials, mineral oils, fats etc. These information is followed by description of surface treatments improving the resistance of building structures against aggressive affects and the concrete impregnation by plastics, spray application of concrete by macromolecular substances, painting materials based on water glass etc. In conclusion the subject concerns the prognosis of building materials durability and the methods of building materials durability determination with possibility of their protection. Fundamentals of the theory of concrete rehabilitation.

Basic Literature

DROCHYTKA, R.; DOHNÁLEK, J.; BYDŽOVSKÝ, J.; PUMPR, V.; DUFKA, A.; DOHNÁLEK, P. Technické podmínky pro sanace betonových konstrukcí TP SSBK III. 1. Brno, Sdružení pro sanace betonových konstrukcí. 2012. 265 p. ISBN 978-80-260-2210-7.  (cs)
MATOUŠEK, M., DROCHYTKA, R. Atmosérická koroze betonu. 1. vydání. Praha: IKAS, 1998, 171 stran, ISBN 80-902558-0-9. (cs)
EMMONS, P., H., DROCHYTKA, R., JEŘÁBEK, Z.: Sanace a údržba betonu v ilustracích. 1. vydání. Brno: Akademické nakladatelství CERM, 1999, 334 stran, ISBN 0-87629-286-4. (cs)

Offered to foreign students

Not to offer

Course on BUT site

https://www.vut.cz/en/students/courses/detail/282308

Lecture

13 weeks, 3 hours/week, elective

Syllabus

  • 1.–2.Failures and defects of building materials (design, documentation, realization).
  • 3. Evaluation of individual types of aggressive media and their effect on building materials (gases corroding concrete, determination of water aggressiveness on reinforced concrete structures, types of water corroding reinforced concrete structures.
  • 4. Types of water corroding reinforced concrete structures, hygroscopic solid substances corroding concrete, mineral fats and oils, microbiologic effects influencing concrete corrosion).
  • 5.–7. The mechanism of concrete destruction and the reinforcement corrosion (corrosion of metal inserts in concrete, cracks formation and shelling initiated by corrosion, corrosion of reinforced structures reinforcement by effect of vagabond currents, penetration of chlorides, carbonation, sulfating, galvanic corrosion, corrosion of prestressed ropes during additional prestressing ,effect of aggressive chemical substances, degradation by frost effect, calcareous expansion, magnesium expansion, alkaline reactions of aggregates, sulphates attack etc.).
  • 8.–9. Corrosion of reinforced structures reinforcement by effect of vagabond currents, penetration of chlorides, carbonation, sulfating, galvanic corrosion, corrosion of prestressed ropes during additional prestressing.
  • 10. Effects of moisture. Heat effects. Load effects.
  • 11.–13. Methods of concrete protection. Methods of reinforcement protection, Theory of concrete rehabilitation. Surface treatment – analyses, strategy, design. Demands onrepair materials and selection of these materials. Surface treatment.