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Amorphous calcium aluminate / concrete additive / cement additive

【Feature】: High-strength and super high-early strength;Low profile;
【Usage】: Accelerated and rapid harding as cement accelerator,mainly in tunnels,
【Package】: 1 MT big bag or 25kg paper bag *40 bags on one pallet ;As per customer’s requirement
Amorphous calcium aluminate is the basic raw material of a new Accelerator, its principal constituent is the non-crystalline calcium aluminate. Appearance of light gray-green powder.
Properties of amorphous calcium higher reactivity than the crystalline product, used in conjunction with silicate cement, can achieve a higher degree of responsiveness and efficiency. Non-crystalline calcium aluminate reacts unexpectedly fast with plaster and water to produce ettringite; adds its appropriate to ordinary silicate cement, the initial setting in less than a minute to complete. Addition of ettringite structural stability, good strength. While ettringite volume expansion, formation of prestressed concrete and shrinkage resistance.
Amorphous Calcium aluminate advantages:
1、Accelerated and rapid harding
2、Defending against leakage
3、High-strength and super high-early strength;
4、Low profile;
5、Enhanced persistence,
6、Good adhesion
Non-crystalline calcium aluminate usages:
1、Accelerated and rapid harding as cement accelerator,mainly in tunnels,underground engineering
2、Defending against leakage in nuclear power plant and other major projects
Physical and chemical indexes of non-crystalline calcium aluminate:
Specification Chemical composition(%)
CaO Al2O3 SiO2 Fe2O3 TiO2 MgO
High-calcium products 50-55% 38-44% ≤5.0 ≤2.0 ≤2.0 ≤2.0
High-alumina products ≤48 ≥42 ≤5.0 ≤2.0 ≤2.0 ≤2.0
Non-crystallization rate Over 95%
Specific surface area 5000-5500 m2/g
Packing: 1 MT big bag or 25kg paper bag *40 bags on one pallet ;As per customer’s requirement

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