COURSE UNIT TITLE

: RHEOLOGY OF CONSTRUCTION MATERIALS

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
CIE 5107 RHEOLOGY OF CONSTRUCTION MATERIALS ELECTIVE 3 0 0 8

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

ASSOCIATE PROFESSOR BURAK FELEKOĞLU

Offered to

CONSTRUCTION MATERIALS
CONSTRUCTION MATERIALS

Course Objective

The aim of this course is to introduce the fundamentals of rheological behavior of cementitious material to the civil engineers to understand and optimize the role of concrete ingredients on fresh state workability. Another aim of this course is to guide the students thinking on the solutions to the production and placement problems that are encountered commonly in construction site. Students will conduct small-scale laboratory studies and will report their findings.

Learning Outcomes of the Course Unit

1   to be able to distinguish the basic concepts related to the rheological behavior of cement-based materials.
2   to be able to perform some experiments in order to determine the rheological properties of cement-based materials.
3   to be able to make judgments about the flow behavior of construction materials by using the rheological parameters.
4   to be able to summarize the factors affecting the rheological behavior.
5   to be able to formulate the mathematical models suitable for rheological behavior.
6   to be able to discuss the effects of chemical admixtures on fresh concrete properties by type.

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 An Introduction to fresh state rheology 1.1. Overview 1.2. Rheology of liquids (Basic terms) 1.3. Behavior of cementitios materials at fresh state 1.4. Workability terms for fresh cementitious composites 1.5. History of rheological measurements and modeling
2 Basic Properties of Fresh Concrete 2.1. Workability 2.1.1. Definition of Workability 2.1.2. The need for Sufficient Workability 2.1.3. Factors Affecting Workability 2.1.4. Tests on Workability
3 Methods of measuring workability 3.1. Direct methods 3.1.1. General properties of rheometers 3.1.2. Rheometer types 3.1.3. Advantages and disadvantages of rheometers 3.1.4. Special rheometers with vane or hellipath spindles 3.1.5. Special rheometers with ball measuring system 3.2. Indirect methods 3.2.1. Methods correlated with a single rheological parameter
4 The concept of rheometers 4.1. Rotational rheometer types 4.1.1. Rheometers suitable for cement paste 4.1.2. Rheometers suitable for mortar and concrete 4.2. Oscillation rheometers 4.3. Extrusion and capillar rheometers
5 Limitations of rheometers for cementitios materials 5.1. Gap size and geometry problems 5.2. Rheometer limits 5.3. Ingredients size and amount limits
6 Factors affecting rheology (1st lab. study) 6.1. Environmental factors 6.1.1. Temperature 6.1.2. Humidity 6.2. Processing factors 6.2.1. Mixer properties used in sample preparation 6.2.2. Pre-mixing conditions (shear history) 6.2.3. Mixing Time 6.2.4. Rheometer geometry and concept of measuring
7 Factors affecting rheology (cont.) 7.1. The action of composite ingredients on rheology 7.1.1. Cement and mineral additives 7.1.2. Aggregate 7.1.3. W/C ratio 7.1.4. Superplasticizer 7.1.5. Fibers 7.1.6. Other admixtures
8 Mid-Term Examination
9 The effect of cement and mineral additives on rheology of materials (2nd lab. study) 9.1. Effects of cement type and content 9.2. Effects of mineral additives and content 9.2.1. Fly ash 9.2.2. Silica Fume 9.2.3. GGBS 9.2.4. Limestone powder 9.2.5. Other mineral additives
10 Effects of chemical admixtures and fibers on rheological parameters (3rd lab. study) 10.1. Lignin based superplasticizers 10.2. Napthalene and melamine formaldehyde based superplasticizers 10.3. Polycarboxylated based based superplasticizers 10.4. Air entraining agents 10.5. Set modifiers 10.6. Effects of fibers on rheological parameters 10.7. Fiber type limitations
11 Basic concepts and parameters obtained from rheological measurements 11.1. Flow curves 11.2. Yield values, instant viscosity and plastic viscosity 11.3. Shear thinning behavior and pseudoplasticity 11.4. Shear thickening behavior and dilatancy
12 Most frequently used rheological models 12.1. Binghan and Herschel Bulkley models 12.2. Other model applicable to; 12.2.1. Cement pastes 12.2.2. Mortar 12.2.3. Concrete 12.3. Comparison of rheological modeling parameters
13 Models for particular situations 13.1. Pumping 13.2. Spraying 13.3. Formwork interactions 13.4. Vibrational compaction
14 Time dependent rheological properties of cementitious materials 14.1. Thixotropy and rheopectic behavior 14.2. Factors affecting thixotropy 14.3. Methods of measuring thixotropy 14.3.1. Hysteresis loops and area measurents 14.3.2. Delayed viscosity and yield stress measurements

Recomended or Required Reading

Textbook(s): - Banfill, P.F.G. (editor) The rheology of fresh cement and concrete, Liverpool, (1990), 373p.
Supplementary Book(s): - Tattersall, G.H., Banfill, P.F.G. The rheology of fresh concrete, Pitman, (1983), 356pp.
- Bartos, P.J.M, Marrs, D.L., Cleland, D.J. (editors) Production methods and workability of concrete, Spon, (1996), 541pp.
- Barnes, H.A., Hutton, J.F., Walters, K. An introduction to rheology, Elsevier, (1989), 199pp.
- Barnes, H.A. A handbook of elementary rheology, Ins-titute of Non Newtonian Fluid Mechanics, University of Wales, (2000), 200pp.

Planned Learning Activities and Teaching Methods

The course is taught in a lecture, laboratory study and class presentation format. Students will conduct small-scale laboratory studies and will report their findings with a rheometer that has been specially designed for cementitious materials. These findings will be presented at the end of semester.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 MTE 1 MIDTERM EXAM 1
2 MTE 2 MIDTERM EXAM 2
3 ASG ASSIGNMENT
4 FIN FINAL EXAM
5 FCG FINAL COURSE GRADE MTE 1 * 0.20 + MTE 2 * 0.20 + ASG * 0.10 + FIN * 0.50
6 RST RESIT
7 FCGR FINAL COURSE GRADE (RESIT) MTE 1 * 0.20 + MTE 2 * 0.20 + ASG * 0.10 + RST * 0.50


Further Notes About Assessment Methods

* Laboratory work and project will be evaluated with homework assignments.

Assessment Criteria

All learning outcomes will be evaluated by using the midterm, final exam questions and laboratory reports.

Language of Instruction

Turkish

Course Policies and Rules

Homework, project report and attendance to laboratory sessions and classroom will be considered in evaluation.

Contact Details for the Lecturer(s)

Yrd.Doç.Dr.Burak Felekoğlu (burak.felekoglu@deu.edu.tr)

Office Hours

Dönem açıldığında duyurulacaktır.

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 13 3 39
Preparations before/after weekly lectures 13 3 39
Preparation for midterm exam 1 15 15
Preparation for final exam 1 20 20
Preparing assignments 3 20 60
Preparing presentations 1 15 15
Midterm 1 2 2
Final 1 2 2
TOTAL WORKLOAD (hours) 192

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11
LO.123
LO.25344
LO.3433
LO.4332
LO.543343
LO.64333

CONTACT INFORMATION
Dokuz Eylül Üniversitesi Cumhuriyet Bulvarı No: 144 35210 Alsancak / İZMİR
Phone: +90(232) 412 12 12 - Fax: +90 (232) 464 81 35

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