Identification:
Chemical Name: Amorphous Calcium Aluminate
Synonyms: ACA, Non crystallized Calcium aluminate, amorphous C12A7,Concrete accelerator; Cement Accelerator Amorphous calcium aluminate
CAS No.: 12042-68-1
Molecular Formula: C12A7
Properties:
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.
Specifications:
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 | ≤1.0 | ≤1.0 | ≤1.0 |
High-alumina products | ≤48 | ≥42 | ≤5.0 | ≤2.0 | ≤1.0 | ≤1.0 |
Non-crystallization rate | Over 95% |
Surface area | 5000-5500 cm2/g or over 6000 cm2/g |
Amorphous Cacium aluminate advantages:
※Accelerated and rapid harding
※Defending againt leakage
※High-strength and super high-early strength;
※ Low profile;
※Enhanced persistence,
※ Good adhesion
Non-crystalline calcium aluminate usages:
※Accelerated and rapid harding as cement accelerator,mainly in tunnels, underground engineering
※Defending againt leakage in nuclear power plant and other major projects
Packing:
1 or 1.1 MT big bag.
关键字： Amorphous Calcium Al;ACA;
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