WO 2017/221749 A1

High early strength agent for cements, high early strength cement using same, and method for producing high early strength concrete

(22) 09.06.2017

(43) 28.12.2017

(57) Provided are: a high early strength agent for cements, which exhibits excellent initial strength developability and excellent fluidity, while having excellent storage stability; a high early strength cement which uses this high early strength agent for cements; and a method for producing a high early strength cement concrete. This high early strength agent for cements contains 30-60 % by mass of nitric acid or a salt thereof, 0.1-10 % by mass of a carboxylic acid or a salt thereof, and water; and the elemental calcium concentration in the high early strength agent is 5-20 % by mass.

(71) Denka Company Limited, 1038338 Tokyo (JP)

(84) ARIPO (BW, 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, 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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