1. Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)
Author : Marta Vila Cortavitarte

2. Why a PhD?. Steps to follow PhD Topic. Materials Motivation
Industries research
PhD Topic.
Mixture design
Introduction.
Laboratory tasks
Objectives
Healing Test Design
What is new?
Fracture-healing test
Statistic Analyses
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

3. Why a PhD? PhD Topic Steps to follow Acknowledgments
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

4. When AC current flow pass through a coil a magnetic field is created.
Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Introduction
Objectives
Asphalt mixtures.
Hydrocarbon binder (≈ 5%) + aggregates (≈ 95%) + additives ( ≥ 0%)
Cold Asphalt
< 40˚C
Half Warm Asphalt
40˚C - 100˚C
Warm Asphalt
100˚C - 150˚C
Hot Asphalt
>150˚C
Magnetic induction.
Coil
When AC current flow pass through a coil a magnetic field is created.
The magnetic field sends eddy currents through the metal. The resistance of metal to eddy currents heats the metal without heating anything else around
Magnetic field
Eddy currents
Conductive material
Conductive material
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

5. Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Introduction
Objectives
Application of magnetic induction over asphalt mixtures.
Bitumen softening temperature + heated metallic particles = Healing of mixture
¿What is the problem of this technic?
COSTS
Quantity of ferromagnetic particles needed to reach induction in a short time.
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

6. Design life Design life PhD Topic
Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Introduction
Objectives
More sustainable and more durable pavements.
Use of magnetic induction technology.
Use of recycled ferromagnetic particles to:
Keep the price of mixture.
Avoid sending them to landfill.
Use of industrial by-products to:
Decrease raw materials’ use.
Avoid sending by-products to landfill and its cost.
Design life
Design life
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

7. Industrial by-products Industrial by-products
Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Materials
Mixture design
Healing Test. Design and optimization
Statistic
Metal shots
Steel wool
Metallic fibres
Ophite (2mm-16mm)
Limestone (< 2mm)
Industrial by-products
Slags
RAP
Sand’s by-products processes.
Industrial by-products
Deburring wastes
Steel Shots wastes
Swarf from machining processes
ELT fibres
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

8. Healing Test. Design and optimization
Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Materials
Mixture design
Healing Test. Design and optimization
Statistic
Different combination of materials will be choosen.
Dosage
Mechanical and dynamic characterisation of each mixture
Select up to three mixtures to continue the research.
Voids in mixture
(UNE )
Water sensitivity
(UNE )
Wheel tracking Test
(UNE )
Loss particle Test
(UNE )
Stiffness Test
UNE-EN
Fatigue Test
UNE-EN
Workability Test
(EN )
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

9. Healing Test. Design and optimization
Why a PhD?
PhD Topic
Steps to follow
Acknowledgments
Materials
Mixture design
Healing Test. Design and optimization
Statistic
Design a method to calculate healing ratio over different shaped samples
Fracture- Healing- Fracture Test
Pre-cracked Marshall’s specimens
Fatigue -Healing- Fatigue Test
Beam’s shaped samples
Cylindrical samples
Optimize healing process.
Crack size
Time needed to heal
Every test result will be statistic analysed to validate the conclusions drawn from the laboratory tests.
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

10. Acknoledgments This study will be possible by:
Why a PhD?
PhD Topic
Steps to follow
Acknoledgments
This study will be possible by:
Spanish Government and European funds (FEDER) .
Construction Technology Applied Research Group
Enterprises involved by now:
PDIC
Toward an eco-friendlier healing of asphalt mixtures (using alternative aggregates and ferromagnetic particles)

11. Toward an eco-friendlier healing of asphalt mixtures
Thank you for listening
Toward an eco-friendlier healing of asphalt mixtures
Any question