What are the general types of ordinary cement? What are the main uses?

Hello, glad to answer for you :

1) According to the main hydraulic substance of cement: Portland cement (the main hydraulic substance is calcium silicate), housing: Portland cement (the main hydraulic substance is calcium aluminate), sulfoaluminate cement (the main hydraulic substance is calcium sulfoaluminate), etc.

Because of their different hydraulic materials, their properties are also different, such as aluminate cement sets quickly. High strength, good heat resistance and sulfate corrosion resistance; Sulfoaluminate cement will expand in volume after hardening, etc.

2) According to the use of cement, it is divided into: general cement (used for general construction projects. Mainly five kinds of cement of Portland), special cement (refers to the cement suitable for special purposes, there are dam cement, oil well cement, masonry cement, etc.) special cement (cement with a more prominent certain properties, such as expanded cement, low-heat cement, colored cement, white cement, etc.).

Ordinary cement is generally used in general civil engineering, works subject to freezing and projects with high strength.

There are two main types of ordinary cement. 325 and 425, which are commonly used.

It is used for interior decoration, brickwork, such as tiling, leveling, wall building, etc.

For example, the cement floor of the office should be high-grade to increase the service life and not sand.

Cement is an indispensable building material, which is widely used in Shanshen construction, roads, bridges, tunnels, water conservancy projects and other fields. Depending on its use, cement can be divided into the following types.

1. Ordinary Portland cement.

Ordinary Portland cement is a commonly used cement variety that is widely used in various construction projects. It has the characteristics of high strength, fast hardening speed and good durability, and is suitable for making concrete, blocks, bricks, stone and other building materials.

2. High-performance cement.

High-performance cement is a new type of cement with the characteristics of high strength, high durability and high crack resistance. It is suitable for making high-strength concrete, high-rise buildings, large bridges, tunnels and other projects.

3. Sulfoaluminate cement.

Sulfoaluminate cement is a special cement variety, which has the characteristics of acid and alkali resistance, high temperature resistance, and corrosion resistance. It is suitable for making acid-alkali resistant bricks, refractory bricks and other materials for chemical, metallurgy, electric power and other industrial equipment.

Fourth, white cement.

White cement is a special cement variety that has the characteristics of white, smooth and delicate. It is suitable for making materials such as high-end architectural decoration, sculptures, floor tiles, etc.

5. Fast-hardening cement.

Fast-hardening cement is a special cement variety with fast hardening speed and high strength. It is suitable for making projects such as emergency repair, rapid construction, etc.

In short, cement is an indispensable kind of Jianxunwei building materials, different cement varieties are suitable for acres and used for different projects, and choosing the right cement varieties can improve the quality of the project, reduce costs and save time.

The uses of cement include civil engineering and construction engineering, and special performance purposes. Leakers.

1. The cement usually used in general civil engineering and construction projects is general cement. General cement mainly refers to: six types of cement specified in GB175-2007, namely Portland cement, ordinary Portland cement, slag silicon backslip Portland cement, porosyl Portland cement, fly ash Portland cement roll and composite Portland cement.

2. Cement with special properties or uses is special cement, such as: G-grade oil well cement, fast-hardening Portland cement, road Portland cement, aluminate cement, sulfoaluminate cement, etc.

1. Cement is divided into three types according to its use and performance

1. General cement: cement commonly used in general civil engineering and construction projects. General cement mainly refers to:

The six categories of cement specified in GB175-2007 are Portland cement, ordinary Portland cement, slag Portland cement, porosyl Portland cement, fly ash Portland cement and composite Portland cement.

2. Special cement: cement for special purposes. Such as: G-grade oil well cement, road Portland cement.

3. Characteristic cement: a certain cement with outstanding performance. Such as: fast-hardening Portland cement, low-heat slag Portland cement, expanded sulfoaluminate cement, phosphoaluminate cement and phosphate cement.

2. Cement is divided into the following according to the name of its main hydraulic substance

1) Portland cement, commonly known as Portland cement abroad;

2) Aluminate cement;

3) sulfoaluminate cement;

4) Ferro-aluminate cement;

5) Fluoroaluminate cement;

6) Phosphate cement.

7) Cement with volcanic ash or potentially hydraulic and other active materials as the main component.

3. Cement is divided into the following according to its main technical characteristics:

1) Fast hardness (water hardness): it is divided into two categories: fast hardening and extra fast hardening;

2) Heat of hydration: divided into two categories: medium heat and low heat;

3) Sulfate resistance: there are two types of sulfate corrosion resistance and high sulfate corrosion resistance;

4) Expansiveness: It is divided into two categories: swelling and self-stress;

5) High temperature resistance: The high temperature resistance of Portland cement is graded by the alumina content in the cement.

According to its main components, it is divided into Portland cement, aluminate cement, sulfoaluminate cement and phosphate cement. According to the use and performance of cement, it can be divided into general cement (such as Portland cement, slag Portland cement, etc.), special cement (such as medium and low heat cement, etc.) and characteristic cement (such as fast-hardening Portland cement, expanded cement, etc.).

Composition, tricalcium silicate (3CaO·SiO2, abbreviated as C3S, accounting for 36% 60%), dicalcium silicate (2CaO·SiO2, abbreviated as C2S, accounting for 15% 37%), tricalcium aluminate (3CaO·Al2O3, abbreviated as C3A, accounting for 7% 15%), tetracalcium iron aluminate (4Cao·Al2O3·Fe2O3, abbreviated as C4AF, accounting for 10% 18%).

Hehe, this problem may be studied in a special class! In fact, you can take a look at the library, encyclopedia, etc., and you will know!