2. Introduction
€ The Pneusol (Tiresoil) is formed by the association of
two elements: used tires and soil
€ Creator : Long Nguyen-Thanh, phD – LCPC
Laboratoire Central des Ponts et Chaussées de Paris
€ First research in 1976 – first report presented in 1978
€ He was named "Chevalier dans l'Ordre Nationale de la
Légion d'Honneur", on the proposition of the Prime
Minister of France Jean-Pierre Raffarin in November
2004
3. Introduction
€ By the end of 2004, more than 1000 structures were
built in the world: France, Algeria, USA, Switzerland,
Germany, Romania, Jordan, Brazil, Rwanda,...)
€ These structures cover a wide range of civil
engineering applications : retaining walls, lightweight
fill, energy absorbers, stress diffusers, slope or river
protection...
4. Why Tiresoil ?
The environmental value
€ Although old tires do not contributed directly in
pollution unless they are burned in open air, they
affect our environment in the long term because they
are not biodegradable.
€ Tiresoil not only helps to consume stocks of old tires,
but also improves the mechanical properties of soil.
6. Why Tiresoil ?
The economic value
€ Reduced density of backfill and/or redistribution of
backfill weight=> more economical structural
elements
Culvert at Monistrole-sur- Cross section of road
Loire embankment
7. Why Tiresoil ?
The economic value
€ Unfortunately contractors do not reveal the real time/cost
economy of using this technology, but we list an example of
tiresoil structure that was built to stabilize a kruth-
Marstein road retaining slope near the Wildstein dam.