What is the purpose of a retarder in concrete?
Concrete has a deadline. From the moment water touches cement, the clock starts. In cool weather with a nearby plant, the normal setting time is enough. In hot weather, on a long haul, or on a massive pour, it is not. The concrete stiffens before the crew finishes, and the result is cold joints, poor […]
How to slow down plaster settings?
Every plasterer knows the frustration. You mix a fresh batch, turn around to grab your trowel, and the plaster is already stiffening in the bucket. Plaster sets fast by nature, and fast setting wastes material and ruins surfaces. The good news is that you can slow it down. This article gives you 7 practical methods […]
Is gypsum a retarder or an accelerator?
Is gypsum a retarder or an accelerator? The question sounds like a trick, but it is a real question from real buyers. The short answer is simple. Gypsum is both. It works as a retarder in one material system, and it works as an accelerator in another. The role changes with the chemistry around it. […]
Types, Dosage Guide, and How ZhiFormix™ GR-01 Extends Setting Time
Gypsum sets fast. That speed is good for production, and it is bad for construction workers. A wall needs time. A worker needs time to spread the plaster, level it, and finish the surface. Pure gypsum often sets in a few minutes, and that is not enough. A gypsum retarder solves this problem. It slows […]