In recent years, the industrial production of waste slag by-products such as slag, fly ash, steel slag and zeolite powder, silica fume and other accumulation is more and more, for the development and reuse of these waste slag waste ore has become a key project.

In the concrete with high quality raw materials of the past, often adding silica fume, but because of the single source of silica fume, it can't meet the requirements of a large number of preparation of high performance concrete, and its price is expensive, less production, so looking for new concrete material has become one of the main direction,As the raw material of ultrafine grinding, slag and fly ash are rich in resources and widely used in production.

Fly ash can be used in large quantities in cement and concrete,The components of fly ash contain a lot of oxides, which have the characteristics of volcanic ash.The utilization of fly ash in concrete mainly produces three effects: pozzolanic activity effect, morphological effect and microaggregate effect.The fine grinding of fly ash can not only accelerate the hydration rate of clinker particles, but also destroy the compact spherical shell of fly ash in advance, accelerate the pozzolanic reaction of fly ash, thus improving the early strength of cement.Scientific research has fully proved that the processed fly ash can become the raw material for reducing the material cost of cement concrete.

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