·The mineral powder whose mass is greater than 5% of the cement mass when mixing concrete (mortar) is called concrete admixture.

·Incorporating admixtures into concrete has significant technical, economic and environmental benefits. It can often save cement, improve concrete properties, and adjust concrete strength levels.

Equivalent substitution method

Additive method

excess substitution method

When reinforced concrete is mixed with fly ash, it is often also mixed with rust inhibitors; Fly ash concrete under low temperature conditions is suitable to be mixed with early strength agent or antifreeze agent at the same time.

The mixing technology of mixing admixtures and admixtures into concrete at the same time is called "double mixing technology".

①Improve the pore structure of concrete and improve durability.

③Improve the strength of concrete.

Suitable for preparation: high flow concrete, pumped concrete and underwater pouring concrete, etc. (In order to maintain the fluidity of concrete, it must be used in conjunction with a high-efficiency water reducing agent to achieve good results)

Can be used in: foundation grouting projects to improve groutability.

Because silica fume has extremely fine particles and high activity, it can significantly increase the strength of concrete. Therefore, silica fume can often be mixed into high-strength concrete.

After incorporating silica fume, the pore structure of cement stone can be significantly improved (macro pores are reduced and micro pores are increased), so the durability of concrete can be improved.

Applies to:

The incorporation of silica fume can reduce the rebound amount of shotcrete, thereby increasing the thickness of the shotcrete and shortening the construction period.

Can be used for: shotcrete projects.

① Silica fume concrete is prone to plastic cracking and early shrinkage, so early maintenance must be strengthened during the construction process.

② Silica fume requires a large amount of water. In order to maintain the fluidity of concrete after mixing, it must be used in conjunction with a high-efficiency water-reducing agent.