Course detail

Technology of Rehabilitation

FAST-NJA034Acad. year: 2022/2023

Methods of investigation of concrete structures.
Rehabilitation of concrete and reinforced concrete: Influence of technology to the durability of concrete. Surface treatment before application of rehabilitation methods. Rehabilitation materials: Surface treatment materials -types, properties, utilization, classification, gunned concrete and gunned mortar. Grouting. Rehabilitation of failures of water resistant concrete, types. Checking the quality of concrete and reinforced concrete rehabilitation.
Rehabilitation of wet masonry (from bricks, mixed, stone masonry): Basic approach. Chemism of wet masonry, biological effects. Porosity of material, outer surroundings effect. Water effect to objects. Determination of moisture in building structures. Masonry - desalination methods. Methods preventing water effects. Insulation materials.
Wood rehabilitation: kinds of wood material attack. Structure of ridden wood. Determination of the type of attack. Technology of rehabilitation - mechanical, chemical methods. Fire prevention of wood.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

doc. Ing. Jiří Bydžovský, CSc.

Department

Institute of Technology of Building Materials and Components (THD)

Learning outcomes of the course unit

The student would acquire knowledge on the whole sanitation process of reinforced, brick and wood structures i.e. on executing the diagnostics of degrade structure (methods, tests, evaluation), sanitation proposal and its execution (technology, materials, etc.), also the description of methodology and frequency of control tests in the course of sanitation process and after its termination.

Prerequisites

Production and properties of binders (especially cements); types and properties of polymer materials; composition and manufacture of concrete, its testing in fresh and hardened state; laboratory methods for testing of building materials properties.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Not applicable.

Assesment methods and criteria linked to learning outcomes

Not applicable.

Course curriculum

1. Introduction into the subject. Basic concepts in the field of reinforced concrete rehabilitation.
2. Diagnostics – types of investigation, extents, division and methods of tests.
3. Strategy of concrete rehabilitation – criteria for the selection of adequate materials and technologies.
4. Contents of technical rules for rehabilitation.
5. Methods of concrete and reinforcement pre-treatment.
6.–7. Repair materials for concrete re-profiling, material base, properties, methods of application.
8. Check tests, methods, frequency.
9. Biology of humid masonry, water evaporation from masonry, capillary attraction.
10. Basic concepts. Chemism of humid masonry, biological factors. Materials porosity, effects of external surroundings. Methods of moisture determination in building structures.
11. Water affecting the objects. Checking of humid buildings.
12. Methods of masonry desalting. Methods of moisture rehabilitation – mechanical, chemical. Rehabilitation mortars. Insulating materials.
13. Type of wood material attacks, structure of degraded wood, determination of the type of attack. Technology of wood rehabilitation – mechanical, chemical.

Work placements

Not applicable.

Aims

The rehabilitation of reinforced structures is during last 10 years an up-to-date, dynamically developing trend in building industry. The subject-leaver obtains actual information about the whole rehabilitation process i.e. about diagnostics performance of degraded structure (method, tests, evaluation) design of rehabilitation and its execution (technology, materials etc.). A component of execution is also the description of methods and frequency of checking tests during the rehabilitation process and after its end.
The next component of the subject is knowledge concerning rehabilitation of brickwork structures. The student obtains here information about reasons of failures and the possibilities of their rehabilitation. The last component of the subject is the rehabilitation of wood.

Specification of controlled education, way of implementation and compensation for absences

Extent and forms are specified by guarantor’s regulation updated for every academic year.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

České technické normy "Výrobky a systémy pro ochranu a opravy betonových konstrukcí", zejména ČSN EN 1504-1, ČSN EN 1504-2, ČSN EN 1504-3, ČSN EN 1504-9, ČSN EN 1504-10 (CS)
Drochytka, R., Dohnálek, J., Bydžovský, J., Pumpr, V., Dufka, A., Dohnálek, P. Technické podmínky pro sanace betonových konstrukcí TP SSBK III. 1. vydání. Sdružení pro sanace betonových konstrukcí, Brno 2012. ISBN 978-80-260-2210-7. (CS)

Recommended reading

Jiří Dohnálek, Juraj Bilčík: Sanace betonových konstrukcí, JAGA group, 2003, ISBN: 80-88905-24-9, 152 stran (CS)
Jaroslav Solař: Odstraňování vlhkosti - sanace vlhkého zdiva, Grada 2019, ISBN: 978-80-247-4708-8, 104 stran (CS)
Jiří Baier, Zdeněk Týn: Ochrana dřeva, Grada, 2004, ISBN 80-247-9000-9, 116 stran (CS)
Michal Kloiber, Miloš Drdácký: Diagnostika dřevěných konstrukcí, Informační centrum ČKAIT, 2015, ISBN 978-80-87438-64-0, 168 stran (CS)
Peter H. Emmons Concrete Repair and Maintenance Illustrated: Problem Analysis; Repair Strategy; Techniques, Wiley, 1993, ISBN 0876292864, 9780876292860, 295 stran (EN)
Raupach, M., Büttner, T. Concrete Repair to EN 1504 Diagnosis Design Principles and Practice, CRC Press 2019, ISBN: 9780367867140, 292 stran (EN)
W Glenn Smoak: Guide to Concrete Repair, Createspace Independent Publishing Platform, 2012, ISBN: 1470068311, ISBN 13: 9781470068318, 172 stran (EN)
Technické kvalitativní podmínky staveb pozemních komunikací, Kapitola 31 Opravy betonových konstrukcí, Ministerstvo dopravy, Odbor pozemních komunikací, 2021. Dostupné on-line: https://pjpk.rsd.cz/data/USR_001_2_6_TKP/TKP_31_2021_final.pdf (CS)

Classification of course in study plans

  • Programme NPC-SIM Master's 1 year of study, summer semester, compulsory

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Jiří Bydžovský, CSc.
doc. Ing. Jan Vaněrek, Ph.D.

Syllabus

1. Introduction into the subject. Basic concepts in the field of reinforced concrete rehabilitation. 2. Diagnostics – types of investigation, extents, division and methods of tests. 3. Strategy of concrete rehabilitation – criteria for the selection of adequate materials and technologies. 4. Contents of technical rules for rehabilitation. 5. Methods of concrete and reinforcement pre-treatment. 6.–7. Repair materials for concrete re-profiling, material base, properties, methods of application. 8. Check tests, methods, frequency. 9. Biology of humid masonry, water evaporation from masonry, capillary attraction. 10. Basic concepts. Chemism of humid masonry, biological factors. Materials porosity, effects of external surroundings. Methods of moisture determination in building structures. 11. Water affecting the objects. Checking of humid buildings. 12. Methods of masonry desalting. Methods of moisture rehabilitation – mechanical, chemical. Rehabilitation mortars. Insulating materials. 13. Type of wood material attacks, structure of degraded wood, determination of the type of attack. Technology of wood rehabilitation – mechanical, chemical.

Exercise

26 hod., compulsory

Teacher / Lecturer

Ing. Amos Dufka, Ph.D.
Ing. Šárka Keprdová, Ph.D.
Ing. Radek Hermann, Ph.D.
Ing. Petr Figala

Syllabus

1. Introduction exercise. Students are introduced with the laboratory procedure and safety. They are introduced with filling exercise and the conditions for obtaining the credit. 2. Testing of base concrete. Summary of basic tests of physical and mechanical properties of concrete in the context of remediation. 3. Methods used in branch of architectural and engineering research of reinforced concrete structures. Video presentation, demonstration acoustic tracking, pull-off test, etc. 4. Laboratory testing significance polymer dispersion in polymercement composites. 5. Specification of statement for architectural and engineering research of reinforced concrete structures and its realization. 6. Laboratory testing of commercially manufactured repair mortars. Comparison of properties (both fresh and hardened) mortars from reputable manufacturers. Comparison with the requirements of standards. 7. Specification of statement for remediation of specific reinforced concrete structures. 8. Excursion to construction rehabilitated one of the innovative technologies, demonstration remediation "in situ". 9. Laboratory testing salinity masonry. Practical introduction to the methods used to determine the presence of salts (sulfates, chlorides, etc.) in brickwork. 10. Laboratory testing of remediation plaster. Comparison of observed values with those declared by the manufacturer of plaster, the definition of usability improvement plasters. 11. Practical examples of the possibilities of rehabilitation of humid masonry with a focus on injection. 12. Laboratory testing of different types of secondary protection (impregnation, coating, etc.). 13. Credit test, grant of the credit.