Durability of concrete structure and structural maintenance
Responsible : Pr Abdelhafid KHELIDJ
I - Part of abdelhafid KHELIDJ (8 h)
1 Reminders
1.1 Presentation of cement
1.2 Reactions hydration and various compounds
2 General approach of Durability of concrete
2.1 Corrosion
2.2 Sulfate attack
2.3 Alkali aggregates reaction
2.4 Frost
3 Permeability
3.1 Darcy Law
3.2 Poiseuille law
3.3 How to measure the permeability ?
3.4 Klinkenberg effect
3.5 Forsheimer law
3.6 Effect of damage
3.7 Effect of crack
3.8 Effect of temperature
3.9 Effect of saturation
4 Chloride Diffusion
4.1 Fick’s laws (1st and second)
4.2 Bind and free chloride
4.3 How to measure chloride diffusion
4.3.1 Steady state
4.3.2 Unsteady state
4.4 Migration and Nernest planck law
4.5 Effect of temperature
4.6 Effect of crack
5 Carbonation
5.1 When and where?
5.2 The condition for carbonation in concrete
5.3 How to measure the depth of carbonation ?
II- Part of Ouali Amiri (6h)
1. Mechanisms involved during chloride ingress (chloride binding, electrostatic interaction, Electrical Double Layer (EDL), activity of pore solution
2. Approaches of modelling of chloride transfer in saturated concrete
2.1 Mono specie Approach: Modified Fick’s Law
2.1.1 Semi-infinite Diffusion : calculation of diffusion coefficient in unsteady state
2.1.2 Infinite Diffusion steady and unsteady state
2.2 Multi species Approach based on Nernest Planck equation
2.2.1 Equations of transfer
2.2.2 Using of migration test in terms of electrical current
2.2.3 Calculation of diffusion coefficient in terms of electrical current
2.3 Multi species Approach whith consideration of EDL Approaches of modelling of chloride transfer in saturated concrete
3. Initiation to chloride transfer in unsaturated concrete
III – Part of Odile Abraham and Xavier Derobert (12 h)
1 Context on NDT
Specificity of NDT
Employment situations and requirements
Implementation of NDT versus management cases
French associations promoting NDT quality
2 Generality on NDT
Non Destructive Evaluation aims
Vocabulary
Inverse problem
3 Basics of ultrasonic methods
Basics of wave propagation (elastic homogeneous linear isotropic)
Geometry characterization
Material properties characterization
4 Classical US techniques (transmission, refraction, ultrasonic pulse echo, impact echo)
principle and experimental set-up
signal processing
example of results
5 Advanced US methods (tomography, surface wave, coda wave)
principle and experimental set-up
signal processing
example of results
6. Ground Penetrating Radar technique
Physical Principe
Data processing
Civil engineering applications
7. Electromagnetic NDT techniques
Low frequency technique
Infra-red technique
Gammagraphy
IV Part of Emmanuel Roziere (4h)
1 - performance-based approach to concrete durability
V - link with other courses
concrete material
Reinforced Concrete,
Chemistry
- Manager: Abdelhafid Khelidj
- Manager: Giulio Sciarra