Course detail

Durability of Building Materials

FAST-NJA035Acad. year: 2022/2023

Introduction to problems of corroded constructions especially with respect to reasons of flaws and failures; kinds of corrosive environment, selection of suitable building materials.
The courses are concentrated especially to clear the microstructure and mechanical changes during degradation, corrosion of reinforced concrete caused by corrosive environment and classification of materials according to durability. Corrosion of metals, degradation of concrete and building materials by liquid and gaseous media, different types of water corroding reinforced concrete structures are discussed in details and the influence of solid matters, mineral fats and oils etc. are discussed as well. This is followed by discussion of surface treatment improving the building structures resistance against aggressive effects and of impregnating concrete by plastic materials respectively, spraying of concrete by macromolecular substances, painting compositions based on water glass etc. Finally the possibility of building materials durability prognosis and the methods of building materials durability determination and possibilities of their protection are discussed.
Lectures are supplemented by laboratory exercises.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

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

Department

Institute of Technology of Building Materials and Components (THD)

Learning outcomes of the course unit

The student would manage the goal of the subject by acquiring knowledge on problems of corroded construction and mainly with regard to the cause of breakdown, kind of corrosive surrounding, choice of suitable construction materials, acquaintance with the methodology for forecasting the endurance of construction material and detecting endurance of construction substances with the possibility of protection.

Prerequisites

Knowledge of possibility of plastics added into cement mortars and concrete,Theoretical and Technological Fundamentals of Inorganic Building Binders,the chemistry and technology of plaster, lime and cement manufacture. Basic knowledge necessary for the task to design composition of concrete with demanded final properties, the basic properties of input raw materials for concrete manufacture and the testing methods.General overview of ceramic raw materials properties, their processing, shaping methods in ceramics, drying, burning, properties of burnt body.

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. Familiarization with problems of corroded buildings, durability, degradation.
2. Reasons of failures and defects of separate building materials.
3. Types of corrosive (aggressive) medium. Selection of adequate building materials, kinds of waters corroding the reinforced concrete structures.
4. Kinds of gaseous media, effect of solid material, mineral greases and oils etc. Mechanism of volume changes.
5. Explanation of chemical micro-structural and mechanical changes during degradation and corrosion.
6. Reinforced concrete degradation initiated by the effect of aggressive media.
7. Degradation of building materials initiated by the effect of aggressive media.
8. Corrosion of metals.
9. Galvanic corrosion and the measuring methods.
10. Primary protection of building materials, influence of composition and of production technology.
11. Secondary protection of concrete. Surface treatments improving the resistance of building structures against aggressive media – classification.
12. Surface treatments – properties, testing methods, failures and defects, prognosis of surface treatment service life.
13. Methods of building materials durability determination including the possibilities of protection. Prognosticating possibility of building materials durability.

Work placements

Not applicable.

Aims

Introduction to problems of corroded constructions especially with respect to failure reasons, kinds of corrosive surroundings, selection of suitable building materials. Acguaint of building materials durability prognosis and the methods of building materials durability determination and possibilities of their protection.

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. Trvanlivost stavebních materiálů. Studijní opora, VUT v Brně, FAST. 2007. p. 1 - 150. (CS)
DROCHYTKA, R. Trvanlivost stavebních materiálů. 156 str., 2008. Elektronické studijní opory FAST VUT.  (CS)
MATOUŠEK, M., DROCHYTKA, R. Atmosérická koroze betonu. 1. vydání. Praha: IKAS, 1998, 171 stran, ISBN 80-902558-0-9. (CS)

Recommended reading

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)
DROCHYTKA, R.; DOHNÁLEK, J.; BYDŽOVSKÝ, J.; PUMPR, V.; DUFKA, A.; DOHNÁLEK, P. Technické podmínky pro sanace betonových konstrukcí TP SSBK III. Brno, Sdružení pro sanace betonových konstrukcí. 2012. 265 p. ISBN 978-80-260-2210-7. (CS)
EMMONS, P. H., EMMONS, B. W. Concrete repair and maintenance illustrated: problem analysis, repair strategy, techniques. R.S. Means Co, 2007. (EN)

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

prof. Ing. Rostislav Drochytka, CSc., MBA, dr. h. c.
doc. Ing. Jan Vaněrek, Ph.D.

Syllabus

1. Familiarization with problems of corroded buildings, durability, degradation. 2. Reasons of failures and defects of separate building materials. 3. Types of corrosive (aggressive) medium. Selection of adequate building materials, kinds of waters corroding the reinforced concrete structures. 4. Kinds of gaseous media, effect of solid material, mineral greases and oils etc. Mechanism of volume changes. 5. Explanation of chemical micro-structural and mechanical changes during degradation and corrosion. 6. Reinforced concrete degradation initiated by the effect of aggressive media. 7. Degradation of building materials initiated by the effect of aggressive media. 8. Corrosion of metals. 9. Galvanic corrosion and the measuring methods. 10. Primary protection of building materials, influence of composition and of production technology. 11. Secondary protection of concrete. Surface treatments improving the resistance of building structures against aggressive media – classification. 12. Surface treatments – properties, testing methods, failures and defects, prognosis of surface treatment service life. 13. Methods of building materials durability determination including the possibilities of protection. Prognosticating possibility of building materials durability.

Exercise

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Vít Černý, Ph.D.
Ing. Jindřich Melichar, Ph.D.
Ing. Radek Hermann, Ph.D.

Syllabus

1. Introductory lesson, work safety, laboratory regulations, preparation of samples for laboratory tests. 2. Basics of the issue of corroded buildings, durability, degradation. Preparation of other samples for laboratory tests 3. Calculation determination of building materials. 4. Determination of influence of different types of cements on degradation by acids. 5. Determination of influence of different types of cements on degradation of cement composites by organic acids of low concentration and other corrosive chemicals. 6. Comparison of influence of fluid and gaseous environment on cement composites and metals. 7. Secondary protection of concretes, surface treatment improving durability of structures against corrosive media – division, properties, methods of testing, flaws and failures, calculation of durability prognoses, effectivity. 8. Comparison of influence of liquid and gaseous media on paint systems on different bases. 9. Determination of effect of secondary surface protection based on different binders against corrosive media. 10. Influence of chlorides on corrosion of reinforcement in RC concretes, theory, preparation of samples. 11. Influence of chlorides on corrosion of reinforcement in RC concretes, calculation models according to EU standards, measurements on samples. 12. Excursions. 13. Checking results, protocols, consultation, granting the credit.