We all know that the expansive material is used in many fields such as material production, silent blasting, etc. So how many types of expansive material do you know? Let’s take a look at it.
1, calcium sulphoaluminate. These expansive materials are: alumite expansion agent (the main component is alum and anhydrite or dihydrate gypsum); CSA expansive material (the main component is anhydrous calcium sulphoaluminate); U-type expansive material (the main component is Anhydrous sulphoaluminate, alum, gypsum, etc.
2, calcium oxide expansive material. There are various preparation methods for such expansive materials, such as adding a suitable amount of gypsum and water-quenched slag by calcination of lime at a certain temperature; mixing of lime and stearic acid; burning limestone, clay and gypsum at a certain temperature. After the mature material is ground, it is mixed with the finely ground gypsum calcined at a certain temperature.
3, metal expansive material. Commonly used iron filings are formulated by adding iron powder with an appropriate amount of oxidizing agent (such as perchromate, permanganate, etc.).
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Post time: Oct-10-2018