| abstract |
A cement additive that improves the fluidity, setting, and strength of cement compositions such as cement paste, mortar, and concrete using ordinary Portland cement as a binder, and a cement composition containing the same. I will provide a. A cement composition containing Portland cement (C), one or more water reducing agents (B) selected from the group consisting of lignin sulfonates and polycarboxylic acids, and lithium sulfate (A). The amount of the water reducing agent is 0.1 to 5% by weight based on the weight of the cement. The addition amount of lithium sulfate is 0.01 to 5% by weight based on the weight of cement. [Selection diagram] None |