Course detail

Theory of Durability and Concrete Rehabilitation

FAST-DJ53Acad. year: 2020/2021

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.

Department

Institute of Technology of Building Materials and Components (THD)

Learning outcomes of the course unit

Not applicable.

Prerequisites

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.

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Emmons, P., Drochytka, R., Jeřábek, Z. : Sanace a údržba betonu v ilustracích . Akademické nakladatelství CERM Brno 1999
Matoušek, M., Drochytka, R: Atmosférická koroze betonů . IKAS Praha 1998
Vavřín, F., Retzl. K.: Ochrana stavebního díla proti korozi . SNTL Praha 1987

Planned learning activities and teaching methods

Not applicable.

Assesment methods and criteria linked to learning outcomes

Not applicable.

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

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.

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.

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.

Type of course unit

 

Lecture

39 hours, optionally

Teacher / Lecturer

eLearning