COMPOSITION OF RADIATION SHIELDING CONCRETE COMPRISING ELECTRONIC ARC OXIDIZING SLAG AS SUBSTITUTE FOR AGGREGATE OF CONCRETE

摘要

PURPOSE: A radioactivity shielding concrete composition including electric arc furnace oxidizing slag for concrete fine aggregate substitution is provided to give radioactivity shielding to concrete. CONSTITUTION: A radioactivity shielding concrete composition is composed of water, cement, coarse aggregate larger than 5mm, fine aggregate smaller than 5mm and foreign materials. The radioactivity shielding concrete composition comprises at least one from iron powder and electric arc furnace oxidizing slag having a density of greater than 3500kg/m^3 as fine aggregate. The radioactivity shielding concrete composition comprises at least one from magnetite and electric arc furnace oxidizing slag having a density of greater than 3500kg/m^3 as coarse aggregate. If both electric arc furnace oxidizing slag and iron powder are included as the fine aggregate and the magnetite is included as the coarse aggregate, 5-15 wt% of the iron powder is added to the electric arc furnace oxidized slag. [Reference numerals] (AA) Slump(mm); (BB) Target slump; (CC) Test piece specimen 1; (DD) Test piece specimen 2; (EE) Test piece specimen 3; (FF) Test piece