What are the main components of cement, the main components of cement

Generally speaking, cement is divided into ordinary Portland cement, Portland cement mixed with mixed materials, and special cement. Its main components are as follows:

1.The main components of ordinary Portland cement are limestone, clay and iron ore fines. It is made by grinding limestone, clay, and iron ore powder in proportion, and the mixture at this time is called raw meal.

It is then calcined around 1450, and the calcination product is called clinker. The clinker and gypsum are then ground together finely and mixed in proportion, which is called cement.

2.The main components of Portland cement are limestone, clay, iron ore powder and mixed materials.

It is to add other substances in proportion and according to certain processing procedures in ordinary Portland cement to achieve special effects, such as slag cement, pozzolana Portland cement, fly ash Portland cement, composite Portland cement, etc. The raw materials of these cements are more reactive mixtures or non-reactive mixtures than the original ordinary Portland cement.

3.The main components of specialty cement are limestone and other components. It's just that the material stage and manufacturing process are a little different. For example, high-alumina cement (Portland cement) is made of bauxite and limestone, which are calcined to produce clinker and then ground into aluminate cement.

The main component of cement: the main component is silicate.

There are many types of cement, and their composition is different.

The name and chemical formula of the main components of ordinary cement: tricalcium silicate.

Dicalcium silicate. Tricalcium aluminate: 3cao·sio2, 2cao·sio2, 3cao·al2o3

gypsum and other ingredients.

The main components of cement are limestone, clay, and iron ore powder, which are finely ground and mixed in proportion.

The cement raw material is finely ground and mixed by limestone, clay and iron ore powder in proportion, and the raw material mixture at this time is called raw meal. Then calcination is carried out, the general temperature is about 1450 degrees, and the product after calcination is called cement clinker. Then the clinker and gypsum are ground together and mixed in proportion to be called cement.

The cement at this time is called ordinary Portland cement.

The raw materials of cement clinker are: calcareous raw materials (such as limestone), siliceous raw materials (such as sandstone, silica), aluminum raw materials (such as fly ash, bauxite) and iron raw materials (such as iron ore, sulfuric acid slag, copper slag), cement raw materials not only include clinker raw materials, but also include some auxiliary materials: clinker, gypsum, mixed materials (such as slag, fly ash, slag, desulfurization gypsum, industrial waste residue, etc.).

Both the gangue and clay groups can produce ordinary cement.

The composition of cement is limestone, sandstone, silicate mineral iron powder and some slag, these components are proportioned, and then ground into a fine powder, which becomes the cement we see now.

Limestone is the cheapest in the composition of cement, cement is mixed with water, it forms a viscous slurry, after a long time of placement, whether in the air or in water, cement will harden, which is also the reason why cement is easy to harden in a humid environment.

The main chemical components of cement are: CAO, SIO2, Al2O3, Fe2O3There are also MGO, K2O, Na2O, SO3, and so on.

Its content is approximately: CAO=64 67%, SIO2=20 23%, Al2O3=4 8%, Fe2O3=3 6%.

The main mineral components of cement clinker are: tricalcium silicate (abbreviated as C3S), dicalcium silicate (abbreviated as C2S), tetracalcium ferroaluminate (abbreviated as C4AF), tricalcium aluminate (abbreviated as C3A).The content is approximately C3S = 52 60%, C2S = 22 28%, C3A = 4 15%, C4af = 4 15%).

Cement: powdered hydraulic inorganic cementitious material. After adding water and stirring into a slurry, it can be hardened in air or better hardened in water, and can firmly cement sand, stone and other materials together.

The mixture of early lime and volcanic ash is similar to modern lime pozzolana cement [1], which cements the crushed stone to make concrete, which is not only strong when hardened, but also resistant to the erosion of fresh water or salt water. For a long time, as an important cementitious material, it has been widely used in civil construction, water conservancy, national defense and other projects.