Potential use of fly ash to soil treatment in the Morava region

Building up Efficient and Sustainable Transport Infrastructure 2017

Bulíková, Lucia^1 ; Kresta, Frantiek^1 ; Rochovanský, Martin^1

Faculty of Civil Engineering, VŠB - Technical University of Ostrava, Ludvíka Podét 1875/17, Ostrava-Poruba

708 33, Czech Republic^1

关键词: Czech Republic;    Hydraulic properties;    Laboratory test;    Maximum dry density;    Optimal utilization;    Soil treatments;    Standard technology;    Technical requirement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/236/1/012091/pdf
DOI  :  10.1088/1757-899X/236/1/012091

来源: IOP

【 摘 要 】

Soil treatment by binders is a standard technology and leads to optimal utilization of excavated soils in road constructions. Soil treatment is controlled in the Czech Republic by EN 14227-15 and Technical Requirement TP 94. Soil treatment using fly ash has not been performed in the Czech Republic, although there is a sufficient normative base. Fly ash produced by burning of hard coal in the Moravian region was tested as a potential binder. Fly ash samples were mixed with loess loams (CI). Tested siliceous fly ash of class F (ASTM C618) did not showed hydraulic properties but it showed positive effect on reducing maximum dry density of mixtures, increasing the IBI value (Immediate bearing index) and decreasing tendency to volume changes when the amount of fly ash was increased. The results of laboratory tests demonstrate the possibility of using fly ashes as a binder for soil treatment.