HUAXUAN® Retarders

RETARDERS ARE TYPICALLY USED to delay the onset of setting or to increase the setting time and thereby also to increase the available processing or production times of gypsum, cement and other mineral binder systems. 

HUAXUAN® Retarders products are very effective gypsum (calcium sulfate binder) retarders, characterized by low dosage and high retardation effects. They give excellent performance for the adjustment of the setting and workability time with a variety of different calcium sulfate binders. HUAXUAN® Retarders is compatible with typically used mix-design components including other set-controlling agents.
The mode of action of HUAXUAN® Retarders is based on targeted intervention in the process of gypsum crystallization. By adsorption on the gypsum crystal surfaces the further integration of calcium and sulfate ions is blocked. Thus gypsum crystal growth, and thereby setting and hardening, are retarded for a certain period of time (dependent on additive dosage).

́ No reduction of hydration intensity for an early end of setting

In addition to retardation, the use of HUAXUAN® Retarders can also have a positive rheological influence: An early binder reaction during the mortar processing phase is typically accompanied by reduced mortar flow, but the addition of HUAXUAN® Retarders counterbalances this and still allows significant water reduction.