The main minerals of portland cement: tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium ferric aluminate.
Cement: powder hydraulic inorganic cementing material. Mud can be hardened in air or water after being mixed with water, and can firmly bond sand, stone and other materials together.
The mixture of early lime and pozzolan is very similar to modern lime-pozzolan cement. After hardening, the concrete made of crushed stone not only has high strength, but also can resist the erosion of fresh water or salt water. For a long time, as an important cementing material, it has been widely used in civil engineering, water conservancy, national defense and other projects.
Extended data:
Cement foaming can be divided into physical foaming and chemical foaming according to different production methods.
1, physical foaming of cement
The foaming agent is made into foam by mechanical equipment, and then the foam is added into the slurry made of cement-based cementitious materials, aggregates, additives and water, and after mixing, stirring, pouring, molding and curing, the insulation board (hereinafter referred to as foamed cement insulation board) is formed.
2. Chemical foaming of cement
The foaming agent is added into the slurry made of cement-based cementing material, aggregate, admixture, additive and water. After mixing, stirring and pouring, closed pores are generated in the slurry through chemical reaction in the mold, and the insulation board is made by curing and cutting.
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