Cementing Expander Agent is primarily composed of MgO and undergoes advanced rotary kiln calcination technology, which compensates for the deficiencies in the performance of calcium oxide and calcium thioaluminate expansion agents, expanding the application range to include compensation shrinkage concrete. It serves as a crack control measure for concrete, taking into account varying factors such as solid well water mud, underground temperature conditions, and different age-related shrinkage. By following the principle of compensation shrinkage and utilizing the adjustable activity characteristics of lightly burnt magnesium oxide, the expansion energy and expansion time are scientifically designed to match the concrete structure's shrinkage. This effectively compensates for internal temperature shrinkage and dry shrinkage, resulting in concrete with excellent crack resistance and impermeability.
MgO cementing expander agent offers numerous advantages, including chemical stability, low water demand, and distinctive properties compared to other expansion agents. It can be tailored to have adjustable properties. The key to designing the adjustable performance of MgO lies in the varying activities of different MgO expansion agents. Different calcination temperatures and durations yield different microstructures, which correspond to varying hydration activities. Low-active MgO expanders exhibit slow expansion initially, with rapid expansion rates and hydration. The expansion speed of low-active MgO expanders can be controlled within the range of 1000-1800 seconds, making them suitable for high-temperature and high-pressure cementing applications.
Advantages:
• stable chemical products
• low water demand
• can designs adjustable properties.
Packaging:
25kg/bag
Performance of testing:
|
Item |
Specification |
|
Appearance |
Light yellow to brownish yellow |
|
MgO content,% |
≥90.00 |
|
Activity S(test under 30℃ |
1000-1800 |
|
Loss on ignition,% |
≤1.00 |
|
Rate of water content,% |
≤1.00 |
|
Fineness (0.315mm testing sieve left) |
≤5.00 |
|
Linear expansion rate,%(Expansion loop method,test under 80℃) |
≥1.00 |
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