A CONCRETE ADMIXTURE USING WASTE TAILING AND METHODE OF THEREOF

摘要

The present invention relates to generally a concrete admixture manufactured by recycling wasted tailing and a method for manufacturing the concrete admixture, and it relates to more par¬ ticularly a concrete admixture manufactured by recycling the wasted tailing which can be used as substitutional material for some amount of general cement and a method for manufacturing the concrete admixture, comprising drying the by-product, i.e. the tailing produced in the concrete manufacturing process wherein the raw ore is grounded and grounded metallic minerals are ben- eficiated, e.g. by floatation to collect valuable metals, extracting the tailing powder having desired range in size by pulverizing the tailing to the predetermined size and classifying the pulverized tailing powder, and mixing the extracted tailing powder to other composition. The concrete admixture according to the present invention which can be used as substitutional material for some general cement to manufacture concrete, comprises 44wt% to 66.5wt% of wasted tailing of a powdered form having a specific surface area of 3000cm² /g to 5000cm²/g; 10wt% to 20wt% of blast furnace slag of a fine powdered form having a specific surface area of 4,000 cm²/g to 8,000cm²/g; 20wt% to 30wt% of fly ash having a specific surface area of 3,000 cm /g to 4,000cm /g; 3wt% to 5wt% of stimulating material including at least one species selected in a group consisting of sodium hydroxide powder, anhydrous gypsum powder, sodium sulfate powder, sodium carbonate powder, aluminium sulfate powder, and sodium silicate powder; and 0.5wt% to lwt% of highly efficient water-reducing material of a powdered form.