1. Introduction
Concrete is the second most consumed product in the world
after water. Its production is estimated at about 6 billion m3 per
year (or 1 m3 per head of population per year). Current concerns
about the environment are leading the construction field to
preserve natural resources through a controlled production of concrete.
This implies the reduction of clinker in the cement used for
concrete, which is the major ecological problem in this field. The
principle is simple: each metric ton of clinker produces one metric
ton of carbon dioxide (CO2). Reducing the amount of clinker in
cement by using other components (additives, by-products,
recycled products, etc.) results in decreased production of CO2 in
this industry.
recycled products, etc.) results in decreased production of CO2 in
this industry.