Course detail

Technology of Rehabilitation

FAST-CJ52Acad. year: 2012/2013

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

Students will get knowledge about new methods of reinforced concrete structures. Students obtain knowledge about investigation methods of construction, about determination mechanical and physico-chemical properties built-in materials. They also obtain knowledge about single phases of repair as well as simultaneously executed control tests.
Next part of course are finding about repair of brick construction, where graduate regaining information on fault sources and possibilities of their sanitation.

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

Durability of building materials.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations. Lectures are supplemented by presentations of numerous graphic material, especially photos of repaired structures. Part of the course is an excursion to some of actually repaired structure.

Assesment methods and criteria linked to learning outcomes

Attendance at seminars is compulsory. During the exercise students work protocols, some of the protocols are made in working groups, some protocols are individual. Other conditions of the credit are successful processing of written test (min. number of successful answers 65%). Properly excused exercise can be replaced individually in the specified date.

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

Drochytka, R.; Dohnálek, J.; Bydžovský, J.; Pumpr, V.; Dufka, A.; Dohnálek, P.: Technické podmínky pro sanace betonových konstrukcí TP SSK III. Sdružení pro sanace betonových konstrukcí, 2012. ISBN 978-80-260-2210-7. (EN)

Recommended reading

Emmons P.: Concrete repair and maintenance. Baltimore, 1994. (EN)
Emmons, P., Drochytka, R., Jeřábek, Z.: Sanace a údržba betonu. Akademické nakladatelství CERM, Brno, 1999. ISBN 80-7204-106-1. (CS)
Matoušek, M., Drochytka, R: Atmosférická koroze betonů. IKAS Praha, 1998. ISBN 80-902558-0-9. (CS)

Classification of course in study plans

  • Programme N-K-C-SI Master's

    branch M , 1 year of study, summer semester, elective

  • Programme N-P-C-SI Master's

    branch M , 1 year of study, summer semester, elective

  • Programme N-P-E-SI Master's

    branch M , 1 year of study, summer semester, elective

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Jiří Bydžovský, CSc.

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

doc. Ing. Jiří Bydžovský, CSc.

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.