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Concrete accelerator
Amorphous calcium aluminate is for Shotcrete Accelerator
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Introduction
Concrete Mix Accelerator Amorphous C12A7 Rapid Setting For Shotcrete Accelerator
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.
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.
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 | 5000-6000 m2/g |
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