WO 2015/104466 A1

Hydraulic cements based on cement or on cement clinker or on lime, on calcium sulphate, and on a pozzolanic component; ­process for the manufacturing thereof and uses thereof

(22) 10.01.2014

(43) 16.07.2015

(57) The present invention relates to a process for preparing a hydraulic cement based on cement or on cement clinker or on lime, and on calcium sulphate in the form of soluble anhydrite, and on a pozzolanic component, said process comprising the following steps: (i) heat treatment of a pulverulent mixture A comprising cement or cement clinker or lime, and calcium sulphate, at a temperature between 200 °C and 800 °C, in order to form a pulverulent composite product comprising cement or cement clinker or lime, combined with the calcium sulphate that is found in the form of soluble an­hydrite, (ii) cooling of the particles of said composite product by bringing into contact with a pulverulent pozzolanic component, so as to bring the temperature of said particles to a temperature below 45 °C in a time of less than two minutes, and to obtain said hydraulic cement in pulverulent powder form.

(71) Greenmade Development Limited, Hong Kong (CN)

(84) ARIPO (BW GH GM KE LR LS MW MZ NA RW SD SL 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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