OREWORLD

Amorphous calcium aluminate

Introduction of Amorphous calcium aluminate(ACA):

Amorphous Calcium Aluminate Cement (ACA) is one of the latest developments in cement chemistry. It's considered a rapid hardening component of cement and shows remarkably high reactivity compared with crystalline calcium aluminates

Amorphous calcium aluminate is used as an accelerating agent for Portland cement, it also can be used as rapid-setting cement with high early strength. In combination with Portland cement, a higher reactivity and efficiency are obtained, where it can be used as a main ingredient in quicksetting agents for shotcrete and hardening accelerators for concrete. Also it can be used in highway repair work. The mineral of the amorphous calcium aluminate (noncrystalline calcium aluminate) is C12A7. The alumina content is about 50%. Due to its high reactivity, the setting time of the cement can be significantly accelerated at relatively low dosage.

Application of the Amorphous Calcium Aluminate:

Shotcrete

Concrete accelerator

Rapid setting, rapid hardening cement

Concrete ground hardening

Rapid-hardening Mortars and Self-leveling mortars etc.

Specifications for the Amorphous Calcium Aluminate (ACA)

Test methods of the setting time

Temperature: ACA powder and water at 20 degrees Celcius, add 40 gram powder to 20ml clean water (not the other way!)

Mix for 5 seconds thoroughly to obtain homogenous paste !

then set in 28-32 seconds

rapid increase in temperature (measured in material)

achieve more than 90 degrees within 60 seconds after mixing

Amorphous calcium aluminate Packing:

By jumbo bags.

Storage

Store in shady, cool and dry place.   

Avoid damp and mix with other substance