Recycling of Gypsum Waste and used to Ground Improvement Solidification Materials

Gypsum waste from plaster board and ceramic mould were recycled with a far-infrared-rays heat-treatment device effectively. Both strength and condensation test of the recycled gypsum were carried out. Mechanical properties of this material used for ground improvement as solidification materials were examined. From the results, it is established that the compressive strength and CBR value are improved when the water of hydration of hemihydrate gypsum is decreased. It is concluded that reclaimed gypsum were effective for ground improvement. Furthermore, process of manufacture for alpha-gypsum hemihydrate are examined