High-efficiency Calcium Sulphoaluminate Expansive Agent is produced by combining appropriate natural anhydrite with a specially formulated clinker, primarily composed of calcium sulphoaluminate and CaO. CSA Expansive Additive is invariably blended with standard cement. When CSA Expansive Additive is mixed with ordinary cement in the correct proportions and hydrated, the resulting cement mortar or concrete undergoes expansion in the initial stages of hydration. This controlled expansion, when properly restrained, enables the reduction of drying shrinkage. Furthermore, as the proportion of shrinkage-reducing admixture to ordinary cement increases, the pronounced expansive properties of CSA Expansive Additive make it particularly suitable for prestressed concrete applications. The high-efficiency shrinkage-reducing admixture is now widely utilized across various sectors of the construction industry by a diverse range of concrete product manufacturers.

•Low Alkalinity. The High-efficiency CSA Expansive Agent exhibits a notably low alkali content (R2O < 0.3%), which is advantageous in preventing Alkali-Aggregate Reaction (AAR) in concrete.

•Brief Stable Expansion Phase. The expansion phase remains stable for no more than 14 days, ensuring that the concrete's ultimate strength is not compromised.

•Minimal Dosage with High Expansion Capacity. The standard dosage of High-efficiency CSA Expansive Agent is 6~8% by weight of ordinary cement, a figure that is lower than other expansive additives available in the market, such as UEA and CEA, which typically require dosages of around 10~12% by weight of cement.

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