WO 2025/078560 A1
Method of producing a pozzolanic material
for use in a low-carbon cement
(22) 11.10.2024
(43) 17.04.2025
(57) A method of producing a pozzolanic material for use in a low-carbon cement, comprising: - providing an argillaceous material that comprises 1 — 49 wt.-% kaolinite, 1 — 49 wt.% muscovite and < 5 wt.-%. calcite, - mixing the argillaceous material with a source of calcium oxide, - co-calcining the argillaceous material and the source of calcium oxide at a temperature of 700-900°C over a time period of 15-240 min, thereby obtaining the pozzolanic material.
(71) HOLCIM Technology Ltd. (CH), 6300 Zug (CH)
