WO 2020/073119 A1

Cement and process for producing self-protecting cement

(22) 07.10.2019

(43) 16.04.2020

(57) A process for producing cement includes combining a cement precursor and a wax, wherein the wax includes alkyl ketene dimer wax and/or alkenyl ketene dimer wax, grinding the cement precursor and the wax to yield cement grains coated with the wax. A cement includes cement powder grains and a coating of wax on the Portland cement powder grains, wherein the wax includes alkyl ketene dimer wax and/or alkenyl ketene dimer wax. A process for making cementitious material includes combining a cement with water to yield a slurry, wherein the cement includes cement powder grains and a coating of wax on the cement powder grains, wherein the wax includes alkyl ketene dimer wax and/or alkenyl ketene dimer wax, and allowing the slurry to set.

(71) Macrocement Industries Ltd., 3605 Weston Road, Toronto, Ontario M9L1V7 (CA)

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