The high alumina content imparts unique characteristics to this aggregate. Some key performance advantages include:
- High Strength: High Alumina Aggregate offers high compressive strength due to the properties of aluminium oxides present. The compressive strength can be as high as 700 MPa.
- Abrasion Resistance: It has excellent resistance to abrasion and wears away slowly. This property makes it preferable for use in road construction, hydraulic works and high traffic areas.
- Acid Resistance: The aggregate has good chemical resistance against acids, alkalis and other corrosive environments. It does not decompose or degrade when exposed to acids.
- Heat Resistance: It can withstand high temperatures up to 1000°C without deteriorating. This characteristic makes it suitable for manufacturing refractory products.
- Low Expansion: The coefficient of thermal expansion is low, reducing risks of cracking.
- Non-Reactive: The aggregate does not react chemically with alkalis present in cement, making it highly compatible for use in concrete.
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