How many kinds of concrete do you know ?

Writer： admin Time：2025-05-26 15:07 Browse：

The artificial stone material, which is made of cementitious material, aggregate and water (or no water) in proper proportion, is made into a mixture with certain plasticity, which is hardened after a certain period of time.
 
  
There are many kinds of concrete
  
Classification by performance density
  
According to the apparent density, concrete can be divided into heavy concrete, ordinary concrete and light concrete. The apparent density of heavy concrete is more than 2600kg / m3, which is mainly used for radiation proof concrete, such as shielding structure of nuclear power engineering, nuclear waste container and so on. Ordinary concrete refers to the concrete with apparent density in the range of 2000-2500kg / m3. It is widely used in civil engineering and construction engineering. It is widely used as load-bearing material of various buildings and structures.
 
 Classification by cementitious materials used
  
According to the types of cementitious materials used, concrete can be divided into cement concrete, polymer concrete, resin concrete, gypsum concrete, asphalt concrete, water glass concrete, silicate concrete, etc.
  
Classification by use
   
According to the use or parts in the project, concrete can be divided into structural concrete, waterproof concrete, heat-resistant concrete, acid resistant concrete, decorative concrete, mass concrete, expansive concrete, radiation proof concrete, road concrete, etc.
  

Classification by production and construction methods
  
According to the mixing (production) mode, concrete can be divided into ready mixed concrete (also known as commercial concrete) and on-site mixing concrete. Premixed concrete is centrally mixed in the mixing station and transported to the construction site by a special concrete truck for pouring. Due to the strong specialization of the mixing station, the fluctuation of raw materials is small, and the weighing accuracy is high, so the quality fluctuation of concrete is small Therefore, the use of ready mixed concrete is more and more.
 
 
Basic component materials of concrete and their functions
 
 
The cement and water in the concrete before hardening is called cement slurry, which has fluidity and plasticity, and connects the aggregate to form an indefinite body with fluidity and plasticity, which is conducive to pouring and construction. After hardening, the cement paste is called cement stone, which has certain strength and cementation, and can combine the granular aggregate to form a solid whole.
 
 
The aggregate in concrete plays a role of skeleton and filling.
 
 Performance characteristics of concrete
 
 
Advantage. Concrete raw materials are rich in sources and low in cost. Aggregate materials such as sand and stone account for about 80% of the total amount. In most places, local materials can be used and the price is cheap. Concrete is an unshaped, plastic material, which gradually hardens into a material with strength by its own physical and chemical changes, so its shape and size are not limited. With the help of formwork, members of arbitrary shape and size can be poured.
  
Disadvantages. The ratio of self weight to strong weight is low. With the development of modern buildings towards high-rise and long-span, the materials are required to have the properties of light weight and high-strength.