As an important component of building materials, concrete’s role in construction cannot be ignored. However, traditional concrete has some shortcomings, such as low strength, easy cracking, and chemical corrosion, which limit the service life of concrete structures. For this reason, improving the mechanical properties of concrete is a key issue in today's construction field.

Improving the mechanical properties of concrete can bring important implications.

First, improve the load-bearing capacity and durability of concrete, increase the service life of concrete structures, and ensure building safety and durability.

Secondly, improving the mechanical properties of concrete can reduce the maintenance and repair costs of concrete structures and improve the economy and sustainability of buildings.

Finally, improving the mechanical properties of concrete can also promote the progress and development of construction engineering technology and promote the sustainable development of the construction industry.

Concrete admixtures refer to substances added to improve and adjust the properties of concrete. They refer to substances added to improve the properties of concrete before or during the mixing process. The dosage of concrete admixtures is generally no more than 5% of the cement mass.

Concrete admixtures are divided into four categories according to their main functions:

1. Admixtures that improve the rheological properties of concrete mixtures. Including various water reducing agents, air entraining agents and pumping agents, etc.

2. Admixtures that adjust the setting time and hardening properties of concrete. Including retarder, early strength agent and quick-setting agent.

3. Admixtures that improve the durability of concrete. Including air-entraining agents, waterproofing agents and rust inhibitors.

4. Admixtures that improve other properties of concrete. Including air entraining agents, expansion agents, colorants, antifreeze agents, waterproofing agents and pumping agents, etc.