Course detail

Concrete Technology 3

FAST-CJ013Acad. year: 2018/2019

Current trends in the field of technology of concrete bring new types of concrete with high end-use properties, using higher proportion of waste materials and focus on the structural side of buildings as well as overall aesthetic perception of concrete structures. In the course of classes and practical exercises, students will become acquainted with specifying, designing and using of concrete with high proportion of fly ash, ultrahigh performance concrete, reactive powder composites, sprayed concrete for tunnel construction, and selected types of mixtures for road building and current trends of direct finish concrete. Methods of designing composition of binding matrix based on achieving maximal density of matrix through use of micro-additions and controlled thickness of interfacial transition zone will be explained as well as influence of hydration heat on rheology of fresh mortar in time, its regulation by means of various superplasticizers, use of nano-technologies in concrete and many others.
Classes are complemented with laboratory exercises.

Department

Institute of Technology of Building Materials and Components (THD)

Learning outcomes of the course unit

Based on knowledge gained in previous courses Technology of Concrete 1 and 2, knowledge is extended with new types of concrete with highly specialized characteristics and end-use properties. Specific requirements for selection and properties of input materials will be explained as well as methods of designing composition of these types of concrete. Because of specific requirements for final properties of fresh and hardened concrete, special test methods will be described verifying their characteristics, field of optimal economical application in construction elements, with respect to ecological impact and principles of keeping the sustainable development of the building industry. The aim is teaching students modern trends of technology of concrete and making them acquainted with concrete with special properties, like ultra-high strength concrete, sprayed concrete for tunnel building technologies, reactive powdered composite materials, concrete with nano-particles, special architectural concrete (translucent, graffiti surfaces) etc.

Prerequisites

Basic knowledge gained in courses Technology of Concrete 1 and 2, Mortars 1 and 2, Composite materials, Durability of building materials. Knowledge of current modern trends is important for achieving special and extreme final properties, reduction of production cost and minimizing ecological load. Basic knowledge about the influence of the character of micro-structure of cement stone on physico-mechanical properties (content and distribution of micro and macro pores, interfacial transition zones between aggregate grains, influence of water-cement ratio on properties of fresh and hardened concrete is necessary. Basic knowledge of rheology of fresh concrete, ways of its measuring, behavior and effect of superplasticizers in concrete are also important.

Co-requisites

Additional knowledge is based on the course Mortars. It is important to be acquainted with types and properties of various types and kinds of concrete, possibility of using active additions of type II, i.e. principles of behavior of reactive silica materials and pozzolanic additions in cement based composite materials. Knowledge of physical chemistry and processes of degradation of concrete is also important. It is necessary to know basic test procedures of testing properties of fresh and harden

Recommended optional programme components

Not applicable.

Recommended or required reading

Not applicable.

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.

Assesment methods and criteria linked to learning outcomes

85% attendance is required to exercise the laboratory measurement and presentation of all reports of laboratory exercises, written test, oral exam

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

1. Rheology of fresh cement mortars – Newtonian, non-Newtonian, Bingham liquid, models, influences on rheology changes.

2. Methods of measuring rheology of cement based and modified suspensions, influence of temperature and superplasticizers on change of rheology in time, influences on development of hydration heat and mechanical properties of hardened mortars.

3. Possibilities of using admixtures for concrete and plasticizers for reduction of volumetric changes, development of temperature during hardening of concrete, optimization of development of strengths for placing of concrete of high volume constructions.

4. Theory of designing composition of special concrete with micro-additions, optimization of density of dry components in binding matrix, granulometric curves in binding system for particles up to 0.25mm.

5. Influence of minimization of void content of components in binding matrix on thickness and quality of the interfacial transition zone between aggregate grains and influence on properties of hardened concrete.

6. Concrete with high content of fly ash (UHVFAC), designing composition, defining properties of fly ash, properties of fresh and hardened concrete, field of application.

7. Ultra high performance concrete (UHPC - 120 – 160 MPa), principles of designing mixtures, field of application, influence of compressive strength on other properties of concrete, like static elasticity modules, resistance to aggressive environment etc.

8. Reactive Powder Composites (RPC), principle of behavior, selection of appropriate fillers, physico-mechanical properties.

9. Types of materials for stabilized base layers of roads, cemented and non-cemented with hydraulic binders.

10. Educational visit

11. Technology of sprayed concrete, description of the variant of dry and wet sprayed concrete, designs of composition, required properties, methods of testing rapidity of strength development.

12. Ecologically friendly concrete (Green Concrete) with recycled filler and low-clinker cements, future prospects of keeping the sustainable development of concrete building industry.

13. Special treatment of surface of architectural concrete –translucent, self-cleaning, graffiti concrete.

Aims

Not applicable.

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.

Classification of course in study plans

  • Programme N-K-C-SI (N) Master's

    branch M , 1. year of study, winter semester, 4 credits, compulsory

  • Programme N-P-C-SI (N) Master's

    branch M , 1. year of study, winter semester, 4 credits, compulsory

  • Programme N-P-E-SI (N) Master's

    branch M , 1. year of study, winter semester, 4 credits, compulsory

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

Syllabus

1. Rheology of fresh cement mortars – Newtonian, non-Newtonian, Bingham liquid, models, influences on rheology changes.

2. Methods of measuring rheology of cement based and modified suspensions, influence of temperature and superplasticizers on change of rheology in time, influences on development of hydration heat and mechanical properties of hardened mortars.

3. Possibilities of using admixtures for concrete and plasticizers for reduction of volumetric changes, development of temperature during hardening of concrete, optimization of development of strengths for placing of concrete of high volume constructions.

4. Theory of designing composition of special concrete with micro-additions, optimization of density of dry components in binding matrix, granulometric curves in binding system for particles up to 0.25mm.

5. Influence of minimization of void content of components in binding matrix on thickness and quality of the interfacial transition zone between aggregate grains and influence on properties of hardened concrete.

6. Concrete with high content of fly ash (UHVFAC), designing composition, defining properties of fly ash, properties of fresh and hardened concrete, field of application.

7. Ultra high performance concrete (UHPC - 120 – 160 MPa), principles of designing mixtures, field of application, influence of compressive strength on other properties of concrete, like static elasticity modules, resistance to aggressive environment etc.

8. Reactive Powder Composites (RPC), principle of behavior, selection of appropriate fillers, physico-mechanical properties.

9. Types of materials for stabilized base layers of roads, cemented and non-cemented with hydraulic binders.

10. Educational visit

11. Technology of sprayed concrete, description of the variant of dry and wet sprayed concrete, designs of composition, required properties, methods of testing rapidity of strength development.

12. Ecologically friendly concrete (Green Concrete) with recycled filler and low-clinker cements, future prospects of keeping the sustainable development of concrete building industry.

13. Special treatment of surface of architectural concrete –translucent, self-cleaning, graffiti concrete.

seminars

13 hours, compulsory

Teacher / Lecturer

Syllabus

1. Opening exercise. Introduction into laboratory rules and H&S, content of exercises and conditions of crediting

2.-3. Design of composition of concrete using micro-additions with the aim of optimization density of cement stone and thickness of interfacial transit zone.

4.-5. Design of composition of concrete with carbon nano-tubes, ways of mixing, verification of influence on strengths after 7, 28 and 60 days, verification of frost-resistance of concrete.

6.-7. Ultrahigh performance concrete – manufacture of mortars in the UHPC composition and combined with classic cement mortars. Ageing of test specimens in various conditions (water, autoclaving) and determining influence on final properties.

8.-9. Design of composition of stabilizations for base layers of roads cemented with hydraulic binders, verification of basic mechanical properties. Mixtures always designed with secondary raw materials.

10. Educational visit

11.-12. Sprayed concrete. Verification of functionality and effectiveness of various types of accelerators, study of development of temperature during accelerated hardening and methods of testing strengths of sprayed concrete at early age.

13. Credit test

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