Effect of ultrafine fly ash powder on cement properties
Fly ash is a small particle produced during the combustion process of coal-fired power plants. It is mainly composed of glass, minerals and carbon. Ultrafine powder refers to powder particles with a particle size less than 0.1 mm. In cement production, ultrafine fly ash powder can be used as an auxiliary cementing material to improve the performance of cement.
Effect of ultrafine fly ash powder on cement properties
1. Improve cement strength
Ultrafine fly ash powder can significantly improve the strength of cement. This is because the ultrafine fly ash powder has high activity and can react with the hydration products in the cement to form a denser structure, thus improving the strength of the cement. In addition, fly ash ultrafine powder can also fill the pores of cement, reduce the occurrence of cracks, and further enhance the strength of cement.
2. Improve cement fluidity
Fly ash ultrafine powder has good flow properties and can improve the fluidity of cement. Adding an appropriate amount of ultrafine fly ash powder to cement can reduce the viscosity of the mixture and improve its fluidity, making construction more convenient and faster.
3. Reduce cement hydration heat
Ultrafine fly ash powder can reduce the heat of hydration of cement. This is because the ultrafine fly ash powder can react with the minerals in the cement to form low-calorie compounds, thereby reducing the hydration heat of the cement. This is of great significance for the construction of large-volume concrete and can reduce the occurrence of temperature cracks.
4. Improve cement impermeability
Fly ash ultrafine powder can improve the impermeability of cement. This is because the ultrafine fly ash powder can react with the minerals in the cement to form a denser structure, reduce the generation of pores, and thus improve the impermeability of the cement. This is of great significance for projects such as basements that require waterproofing requirements.
Fly ash ultrafine powder is an industrial waste with high utilization value and can play an important role in cement production. By adding an appropriate amount of ultrafine fly ash powder, the properties of cement can be improved, increasing its strength, fluidity, impermeability and durability. At the same time, the application of ultrafine fly ash powder can also reduce cement production costs and environmental pollution, meeting the requirements of sustainable development.