Steel-smelting slags of Kuzbass in production of clinker-free fine-grained slag concrete

Abstract

Article presents the results of experimental studies of fine-grained slag concrete based on mechanically activated steel slag of West Siberian Metallurgical Plant (Novokuznetsk). The purpose of research was to develop scientific principles for obtaining clinker-free fine-grained concrete based on activated steelmaking waste resources. For slag crushing for the purpose of binding properties initiation commercial equipment have been selected; coal industry waste of the Abashevskaya mine (Novokuznetsk) was used as activators, i.e. the pit dump burnt rocks, and sludge, obtained by neutralization of used acid batteries, batteries for industrial vehicles with lime electrolytes. Disposal of steelmaking waste remains a challenging issue and possibility of using this type of waste in production of clinker-free fine-grained concrete for industrial and civil construction will create an industrial resources base for the construction industry to improve ecological situation in the region. Change in structure of steelmaking resources using mechanical chemistry has increased its structural instability and activity and has enabled obtaining waterproof clinker-free fine-grained slag concrete of matrix structure (softening factor 0,84 – 0,95) and B7 strength class. The developed slag concrete has been tested at construction companies in the region.