CSA binder type 3 grade 72.5, crafted by Tangshan Polar Bear Building Materials Co. Ltd, stands as a pinnacle in construction materials. Originating from China, this expansive agent, akin to DENKA CSA 20#, is engineered with calcium sulphoaluminate. Boasting a compelling blend of affordability and remarkable expansive ratio, it has gained traction in the construction realm, enhancing quality and expediting erection times.

Its applications span diverse domains, including concrete admixture, expansive additives, mortar for demolition, ceramic tile adhesive, crack-resistant water-proofing agent, non-shrinkage grouting, and anti-crack self-leveling materials.

Featuring low alkalinity (R2O < 0.3%), a short stable stage of expansion (not exceeding 14 days), and low dosage/high expansion capacity (6-8% by cement weight), it outshines competitors like UEA and CEA.

Moreover, it prevents cracking due to shrinkage and hydration heats, augments concrete water tightness, and facilitates high-strength product manufacturing through chemical prestressing.

The mineral composition includes CaO, CaSO4, and 3CaO·3Al2O3 ·CaSO4, with a specific surface area of 200-400 m2/kg and specific gravity of 2.8-3.0. The physical properties, tested under standard conditions, attest to its restrained expansion rate and strength enhancement in cement mortar.

Application-wise, the dosage ranges from 6-8%, requiring thorough mixing with cement, aggregate, and water. Curing involves spraying water or membrane curing for at least 14 days post-casting. Sensitivity to water mandates storage in waterproof bags in dry places.