What is concrete?

Concrete (concrete, stone arrow) is a composite material which is composed of cementing material, aggregate and water in a proper proportion and hardened after a certain period of time. It is the most widely used artificial civil building material in the world. Concrete has high hardness, wide sources of raw materials and low cost, and is widely used in buildings, highways, military engineering, nuclear power plants and other structures.

Concrete refers to a mixture of cementitious materials (organic, inorganic or organic-inorganic composite), granular aggregates, water, chemical additives and mineral admixtures in a proper proportion, or a composite material with a stacked structure after hardening (generally, cementitious materials, water, fine aggregates and coarse aggregates are mixed with additives and mineral admixtures in a proper proportion when necessary).

Concrete is one of the most important civil engineering materials.

Concrete has the characteristics of abundant raw materials, low price and simple production technology, so its consumption is increasing day by day. At the same time, concrete also has the characteristics of high compressive strength, good durability and wide range of strength grades. These characteristics make it widely used, not only in various civil engineering, but also in shipbuilding, machinery industry, marine development, geothermal engineering and so on. Concrete is also an important material.

Concrete is a building material full of vitality. With the continuous development of concrete component materials, people's understanding of material composite technology is also improving. The performance requirements of concrete are not limited to compressive strength, but based on strength, paying more attention to the balance and coordination of comprehensive indicators such as durability and deformation performance of concrete. The requirements for various performance indexes of concrete are clearer, more detailed and more specific than before. At the same time, with the improvement of building equipment and the emergence and popularization of new construction technology, concrete technology has adapted to different design, construction and use requirements and has developed rapidly.

Concrete is not a single material that exists in isolation. This is closely related to the development of concrete raw materials and the development and change of concrete engineering application objects. Attention should be paid to concrete from the perspective of civil engineering. The same is true of concrete mix design. First of all, it is necessary to analyze the structure, component characteristics and design requirements of the project, predict possible unfavorable situations and risks, base on local raw materials, and then adopt scientific, reasonable and feasible technical routes and means. Prepare high-quality concrete that meets the design requirements, construction technology requirements and use requirements.