How does Concrete admixture significantly improve the compressive physical properties of concrete?
Publish Time: 2024-05-23
Concrete admixture significantly improves the compressive physical properties of concrete mainly through the following methods:
Filling effect: Reinforcing agents, such as silicate, sodium silicate, silica sol, etc., can fill the pore structure inside the concrete, reduce the porosity and pore size, and make the concrete denser. This increase in density helps increase the compressive strength of concrete.
Improve cement hydration: Certain admixtures, such as early strength agents, can accelerate the hydration reaction of cement and form more hydration products. These hydration products can fill between cement particles, increasing the density and strength of concrete.
Reduce the amount of cement: Water reducing agents improve the fluidity of concrete by reducing the water content of the cement slurry of concrete, thereby improving the working performance of concrete without increasing the amount of cement. In this way, the cement dosage can be reduced while ensuring the working performance of concrete, and indirectly improving the compressive strength of concrete.
Change the internal structure of concrete: Air-entraining agents can form tiny bubbles in concrete, which can reduce the concentration of stress inside the concrete and prevent concrete from cracking. At the same time, the presence of bubbles can also improve the frost resistance and durability of concrete, thereby improving its compression resistance.
Improve the durability of concrete: Some admixtures, such as impermeable agents and preservatives, can improve the durability of concrete. By reducing the penetration of moisture and harmful substances, these admixtures protect concrete from chemical attack and physical damage, thereby maintaining its long-term compressive strength.
In summary, Concrete admixture can significantly improve the compressive physical properties of concrete by filling, improving cement hydration, reducing cement dosage, changing the internal structure of concrete, and improving the durability of concrete.
