Import Csa Expansive Agent — Buy in Bulk from Supplier in China

CSA Expansive Agent is a cement additive manufactured by blending natural anhydrite with a clinker rich in calcium sulphoaluminate and CaO. When mixed with ordinary Portland cement and water, it induces controlled expansion during early hydration, counteracting drying shrinkage in concrete. The product is designed for use in structural applications where dimensional stability is critical, such as prestressed concrete and self-stressing systems.

The agent operates through the formation of ettringite crystals during hydration, generating micro-expansion that compensates for shrinkage without compromising compressive strength. Typical industry formulations use 8% to 12% by weight of cement, though exact ratios depend on the desired expansion rate and ambient conditions. It is not a standalone material but a functional component integrated into cementitious mixes for specialized applications.

Buyers include manufacturers of precast concrete pipes, tunnel linings, and high-durability infrastructure elements. The product is supplied in bulk bags or loose bulk for industrial use. Trade terms are typically FOB Chinese port, with lead times of 15 to 25 days depending on order volume. Buyers should confirm compatibility with their cement type and local building codes before use.

Polar Bear is a supplier of industrial cement additives based in Beijing, China. The listing indicates no verified factory inspection, no production capacity data, and no response history. The supplier's profile shows no verified certifications or client references. The product information provided is generic and matches standard industry descriptions without unique process details.

There is no evidence in the listing of manufacturing capability, export experience, or technical support infrastructure. The supplier's address is listed as a generic Beijing postal box, with no street-level detail. Buyers should request independent lab reports and sample testing before placing orders, as no third-party verification signals are available.