What effect does silica content have on cement properties?
Formation of Portland cement clinker and the effect of silica calcium oxide calcium silicate minerals, if low silica content in clinker of silicate minerals is little, silicate minerals are the main mineral cement play strength, the content of deficiency will lead to low strength cement; if the silicon content of two oxide high, then the condensation rate and increase the rate of the early strength of cement slow, late strength will significantly increase, and can enhance the corrosion resistance of cement.
Properties: SiO2, also called silica. Widely distributed in nature, such as quartz, quartz sand and so on. White or colorless, with a higher iron content is pale yellow. Density 2.2 ~ 2.66., melting point 1670 degrees (Lin Shiying); 1710 degrees centigrade (square quartz). Boiling point 2230 DEG C. Insoluble in water and acid (except hydrofluoric acid); particles can interact with molten and alkali groups. Used for making glass, water glass, pottery, enamel, refractory material, ferrosilicon, molding sand, silicon and so on.
At the same time also have an impact on the silica content of clinker, high silica content, liquid amount, calcination is difficult, will increase the heat consumption of clinker, easy powder; low silica content, liquid volume, easy to form large, affecting the operation.
