00:17 Presentation of GITECO (Construction Technology Research Group)

00:52 European aid

01:59 Introduction

03:28 Different types of fibers and their applications.

16:45 Road curing with induction and metallic particles

18:54 Mix design

24:09 Application of metal wastes

26:53 Use of plastic waste in road construction

32:49 Replacing asphalt with plastic in road construction

40:31 Pollutant-reducing asphalt mixes

44:16 Reducing dependence on asphalt

46:25 Q&A

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Before delving into materials and techniques, it is essential to understand the context driving these innovations. The European Green Pact sets priorities to achieve a circular economy, reduce transport noise pollution, address microplastics issues and minimize waste. In addition, European climate legislation emphasizes the impact of asphalt production on greenhouse gas emissions. To support these priorities, the European Union has allocated substantial funding between 2021 and 2027.

Materials for road infrastructure

Fiber reinforcement in asphalt mixtures
Fiber reinforcement is a promising approach to improve the mechanical properties of asphalt mixtures. Researchers have studied the use of various fibers, including polyacrylonitrile and aramid fibers, in dense porous asphalt mixtures. The main results are as follows:
- The addition of fibers improves the rutting resistance of conventional asphalt mixtures.
- For porous asphalt mixtures, fibers reduce particle loss and improve resistance to water sensitivity.
- However, fiber-reinforced mixtures do not achieve the mechanical performance of polymer-modified asphalt mixtures.
- The effects of long-term aging of fiber-reinforced mixtures are still being investigated.

Magnetic induction technology
Magnetic induction technology, mainly used in road construction, aims to provide self-repairing properties to road surfaces. The process involves incorporating metallic particles into asphalt mixes, which enables induction repairs to be made. The key points are:
- This technology is aimed at restoring road surfaces without manual intervention.
- Research is focused on the design of mixtures with metallic particles that respond to induction.
- The scalability and long-term durability of magnetic induction technology needs to be further studied.

Recycled plastics in road construction
The incorporation of recycled plastics in road construction is gaining momentum as it offers economic and environmental benefits. Here are some key facts:
- Road construction projects are increasingly using recycled plastics, which addresses sustainability concerns.
- Plastics improve the strength of porous asphalt mixtures, especially when it comes to managing heavy rainfall.
- Although recycled plastics are promising, they are not yet a complete substitute for traditional materials.

Functional properties of asphalt mixtures
In addition to the materials themselves, the functional properties of asphalt mixtures are crucial to road performance. Researchers are examining properties such as permeability, clogging resistance and spillage resistance, especially in porous asphalt mixtures.

Innovations in road construction materials and techniques are essential to meet the demands of modern transportation while addressing environmental and economic concerns. Fiber reinforcement, magnetic induction technology and recycled plastics represent promising avenues for improving road infrastructure. However, further research and development is needed to ensure the long-term viability and scalability of these innovations. As we move forward, the road construction industry will play an important role in shaping a more sustainable and efficient future for transportation networks.

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