| abstract |
A fast-curing cement having excellent early strength development at low temperatures is provided. A fast-setting cement containing a clinker pulverized product, a Portland cement clinker pulverized product, anhydrous gypsum, a setting accelerator, and a setting retarder mainly composed of 3CaO, 3Al 2 O 3 and CaSO 4 , and a setting accelerator. Is one or more setting accelerators selected from sodium thiosulfate, calcium lactate, sodium carbonate, potassium sulfate, and sodium sulfate, and the setting retarder is citric acid and its salt, heptonic acid and its salt, succinic acid And one or more setting retarders selected from among salts thereof, tartaric acid and salts thereof. [Selection figure] None |