WO2019026674 (A1)

Cement admixture, cement composition and production method therefor

(22) 23.07.2018

(43) 07.02.2019

(57) Provided are a cement admixture and a cement composition, which, in a cement concrete cured body, have excellent anti-rust effects on an internal rebar, have shielding effects against chloride ions infiltrating from the exterior, and in addition, have low leaching of Ca ions and can suppress pore development. The cement admixture contains calcium boroaluminate wherein the molar ratio CaO/Al2O3 is 0.15 to 0.7, and the B2O3 content is 0.05 to 10% by mass.

(71) Denka Company Ltd (JP)

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