Hydraulic road binders with high content of fly ash: Czech experience

Hydraulic road binders are very popular in soil treatment industry especially due to their low costs in comparison with traditional binders like lime or cement. Composi- tion and main parameters of hydraulic road binders are summarized in EN 13282-1, - 2.
Research on binders with high content of fly ash started in Czech Republic a long time before the finishing of EN standards.
The RSS5 binder consisting of 80 % of calcareous fly ash from fluid burning of black coal and 20 % of quick lime has been used since 2010. It is a very good alternative for treatment of clays and sandy clays instead of lime.
The ViaCalco binder is composed of fly ash and lime kiln dust. It is used for stabilisation especially of capping lay- ers and pavements with high demands for their stiffness (e.g. airport runways).

Author: F. Kresta

Section: Waste utilization

Keywords: hydraulic road binder, fly ash, selective non-catalytic reduction, SNCR