WO 2017/178860 A1

A method for determining a plasticity parameter of a hydrating cement paste

(22) 15.04.2016

(43) 19.10.2017

(57) A method for determining a plasticity parameter of a hydrating cement paste comprising: providing components of a cement paste, mixing the components to obtain a cement slurry (C) and pouring said cement slurry (C) in a sealed oedometric cell (2), performing an oedometric measurement operation within a predefined early- age time interval following the mixing of said cement slurry (C) by applying a predefined axial stress profile to the cement slurry (C) inside the oedometric cell (2) over a predefined measurement duration and measuring an axial strain of the cement slurry (C) within said predefined measurement duration. A plasticity parameter of the hydrating cement paste is determined by a calibration processing operation comprising providing an initial value of a plasticity parameter of an elastoplastic model of hydrating cement paste, determining simulated axial strain values by solving the elastoplastic model of hydrating cement and comparing the simulated axial strain values with the axial strain measurements of the cement slurry (C) to determine a plasticity parameter of the hydrating cement paste.

(71) Total SA, 2 place Jean Millier, La Défense 6, 92400 Courbevoie (FR)

(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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