WO 2023/075371 A2

Eco-friendly cement additive composition for fixing heavy metal ions

(22) 25.10.2022

(43) 04.05.2023

(57) The present invention relates to an eco-friendly cement additive composition for fixing heavy metal ions in normal cement, and provides an eco-friendly cement additive composition for fixing heavy metal ions, comprising: (1) 50-85 wt% of fluidized bed boiler ash; (2) 1-15 wt% of anhydrite powder; (3) 5-20 wt% of blast furnace slag; (4) 5-10 wt% of at least one selected from the group consisting of porous expanded vermiculite powder and expanded diatomite powder; and (5) 1-5 wt% of iron oxide powder.

(71) Lee, Jae Sung, Gangwon-do (KR); Lee, Jae Hyun, Gangwon-do (KR)

(84) ARIPO (BW, CV, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)


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