Eco-friendly concrete for precast products : acceleration of the hardening of ternary binders

This study is part of the action program of the French Concrete Industry; it aims finding innovative solutions of concrete with low CO2 emissions impact, which allow to get technical and economic performances at least equivalent to those of the traditional concretes. To answer this issue, the study of ternary binders, made of Portland cement CEM I, blast furnace slag and limestone addition, was realized by optimizing the means that are
available in precast industry to accelerate their hardening: u01
Thermal treatment proves to be the most powerful lever of action. The developed solutions (material and process) obtain a much better economic-environmental balance compared to a control concrete whose binder is composed of Portland cement CEM I.

Keywords: accélération, eco-friendly concrete, Hardening, ternary binders