The resulting particle is a fibrous aggregate of fine crystals with capillary pores known as

When gypsum is heated in a kettle, vat, or rotary kiln that maintains a wet environment; a crystalline hemihydrate called

α-hemihydrate β-hemihydrate • Formed when dihydrate is heated under

Set gypsum products probably never attain 100% conversion unless they are exposed to

The colloidal theory proposes that, when mixed with water, hemihydrate enters into the colloidal state through a ________mechanism.

The hydration theory suggests that rehydrated plaster particles unite through ___________ bonding with sulfate groups to form the set material.

The tests done for setting of gypsum products are listed as below EXCEPT

Increasing or decreasing the rate of crystal growth will accelerate or retard the

The most commonly used accelerator is