In a civil construction, cement is one of the most important materials used. However, as there are several types of cement in Brazil, you must be careful and careful when buying.
Each type of cement has a different composition than the other, which gives the concrete a unique quality. You will find specific cements for workability, others for durability, others for strength and much more.
In our article we explain the overall composition of Portland cement and how each type of cement should be used according to the needs of its work. Check it now!
Composition of Portland cement
Portland cement is most commonly used in Brazil and its material is the powder, which is in a fine powdery state. In its composition, the silicates and aluminates are calcium and virtually no free lime.
Complex silicates and aluminates when mixed with water, hydrate and produce dough gardens. In addition, it offers high mechanical strength. Since there are several types of Portland cement, it is appropriate to observe the indication of each of them.
Types of Portland cement
CP I – Common Portland cement
This type of cement is considered to be the purest, since it has no addition, except in the case of gypsum, which is used as a retarder of the handle. It is a simpler type of cement and therefore it is generally used more in construction, unless there are special requirements for cement.
Work that is not frequently exposed to water, sewers or sewers, and that is not in environments where soil or groundwater sulfates are present, is best suited for use with this type of cement. Its resistance is 25 MPa.
CP IS – Common Portland cement with additive
The CP IS contains the same composition as the most common cement. The difference is that the CPI-S adds a maximum of 5% pozzolanic material in its mass, while the common portland has nothing. However, this cement guarantees less permeability. The resistance class is the same as the CP I of 25 MPa.
CP II-E – Portland cement from granulated blast furnace slag
The CP II-E has more additives than other types of cement containing only gypsum. It’s a mix between the Portland Common and Portland with addition. However, this type of cement must be used if the structures release moderately slow heat release or can be attacked by sulfates. Therefore, it is most often used in materials that do not give off heat. Its resistance class is 25, 32 and 40 MPa.
CP II-Z – Puzzolan Portland cement
For those who need to use cement in marine, industrial and underground work, CP II-Z cement should be used as it contains the addition of pozzolanic material. This type of material provides greater impermeability, which allows the concrete to last longer. Its resistance class is 25, 32 and 40 MPa.
CP II-F – Portland Cement connection with filter
This type of cement can be used in various applications, but is not indicated in more aggressive work. However, it can be used in work requiring a high durability of the material, as is the case with reinforced concrete work.
Its composition is in addition to clinker 6% to 10% carbonate material or filler. Other preparations may also use this type of cement, such as mortar, coating mortar, thin concrete, concrete floors and others. The resistance class is 25, 32 and 40 MPa.
CP III – Blast Furnace Portland Cement
The CP III has a slag content of up to 70% in its composition. The slag helps the material to achieve greater impermeability, which keeps it longer. In addition, the cement receives a higher resistance to sulfates and a low heat of hydration.
This type of cement must be used more in the execution of large jobs, especially in dams and sewers. But it can also be applied on paved roads, runways, industrial streams, etc. Its resistance class is 25, 32 and 40 MPa.
CP IV – Pozzolan Portland cement
The pozzolanic Portland cement has in its blend about 15 to 50% pozzolanic material. Therefore, the material is given a greater impermeability so that a particular job can have more durability.
The use is particularly indicated when working with large temperature fluctuations. In addition, it can also be used in plants subject to the action of running water and in aggressive environments, since the material has a low porosity. Its resistance class is 25 and 32 MPa.
CP V-Ari – First high-strength Portland cement
This is a very basic type of cement because it contains no additives in its composition. The process of dosing and clinker production distinguishes CP V – Ari from CP I.
It is a type of material that initially reaches a resistance of 26 MPa because it undergoes several changes in limestone, clay and clinker production. The first day you apply the concrete, it is already very stable, but you have to be careful that it deforms quickly.
Its use can be done both in small works and in large works. However, it should not be used in works that are exposed to seawater or those that contain sewage because cement does not resist aggressive agents.
CP-RS – sulphate resistant Portland cement
The CP-RS has 25, 32 and 40 MPa as resistance class. It is a type of cement which is resistant to sulphates since its composition is formed by C3A and / or carbonaceous additives. Therefore, it is most often displayed in works that are rich in this connection.
The works that make the most of this material are sanitary sewage networks, industrial environments, marine and coastal areas because of their resistance to material and other types of soil.
However, this does not prevent cement from being used, among other things, for structural refurbishment work, concrete structures, precast concrete, paving, reinforced concrete, prestressed concrete.
CP-BC – Portland Low Cement Moisture Cement
The low hydration Portland cement has the purpose of slowing the loss of heat, especially in cases of large concrete masses. During the hydration phase of the cement, the heat developed prevents the occurrence of cracks of thermal origin. In addition, the material increases the durability of the structure.
Low heat portland cements generate up to 260 J / g and up to 300 J / ga for 3 days or 7 days hydration. So, when you buy, make sure that the cement is correct.
CP-B – White Portland cement
White Portland cement can be classified as structural and non-structural. In the case of buildings, it should be used in architectural works and have the same characteristics as other types of cement but with the familiar white pigmentation.
In the case of non-structural, it is more suitable for Keramikverguss. To achieve its white color, raw materials of low manganese and iron content and the use of kaolin instead of clay are used. The resistance class is 25, 32 and 40 MPa.
When working on your home, it is important that you have all the necessary information about the product at the time of cement purchase so you do not pick the wrong material.
So look at all the descriptions we give about the different types of cement on the Brazilian market. If you are still experiencing difficulties, you can call on a specialist at this time.