Post Date:8,Sep,2025

The role of concrete admixtures:

The role of concrete additives varies with the type of concrete additives. The general role is to improve the fluidity of the corresponding concrete when the water consumption per cubic meter of concrete or the cement consumption does not change; when the cement consumption remains unchanged or the concrete slump remains unchanged, the water consumption can be reduced, and the concrete strength is also improved, and the durability of the concrete is improved; when the design strength and concrete slump remain unchanged, the cement consumption can be saved and the cost can be reduced, etc. The early strength agent improves the early strength of concrete and is mostly used for emergency repair projects and winter construction concrete; the water reducer has a water-reducing and strengthening effect while keeping the concrete consistency unchanged; the air entraining agent mainly reduces the water segregation caused by bubbles generated during the mixing process of concrete and improves the workability of concrete; the retarder can delay the setting time of concrete, and has both retarding and water-reducing effects. It is mainly used for large-volume concrete, concrete constructed under hot weather conditions, or concrete transported over long distances.

Analysis of the influence of admixture water reducer on concrete performance:

Concrete admixture water reducer is mainly composed of surfactants. This surfactant belongs to anionic surfactants. In essence, concrete alkali water agent does not play a chemical role with cement. Its effect on concrete is mainly reflected in the plasticization of fresh concrete. Plasticization is a wetting, adsorption, dispersion and lubrication effect.

The adsorption, dispersion, lubrication and wetting effects of the admixture water reducer make it easy to mix the concrete evenly with only a small amount of water, so that the workability of the fresh concrete is improved. This is the plasticization effect of the admixture water reducer on the fresh concrete.