REACTION ACCELERATOR FOR FLYASH CONCRETE, METHOD FOR PREPARING THE SAME AND FLYASH CONCRETE COMPOSITION COMPRISING THE SAME

摘要

PURPOSE: A composition of reaction accelerator for fly ash concrete, a manufacturing method thereof, and a fly ash concrete composition including reaction accelerator composition are provided to shorten setting time and setting time of high-volume fly ash concrete with content amount of the fly ash by including fluoride salt. CONSTITUTION: A composition of reaction accelerator for fly ash concrete comprises more than one of fluoride salts which are selected from lithium fluoride and aluminium fluoride. The composition of reaction accelerator for fly ash concrete additionally includes aluminium sulfate. The composition of reaction accelerator for fly ash concrete can be obtained by mixing 1-10 weight% of hydrofluoric acid, 1-20 weight% of aluminium hydroxide, 1-10 weight% of lithium hydroxide, 1-40 weight% of aluminium sulfate, and 20-95 weight% of water. A manufacturing method of the composition of reaction accelerator for fly ash concrete comprises next steps: adding hydrofluoric acid, aluminium hydroxide, and lithium hydroxide to water; manufacturing lithium fluoride by performing a reaction with aluminium fluoride at 55-100 deg. Celsius; adding water to the aluminium fluoride and lithium fluoride; and injecting aluminium sulfate.