Material Characteristics and Leaching Behaviour of Recycled Bassanaite as Soil improvement Effects from Waste Plaster Boards

摘要

Plaster boards are interior materials for buildings primarily comprising of plaster shaped into a board and then coated on both sides with paper. They are widely used for the walls and ceilings of buildings. Furthermore, they are also widely used as building foundation materials; consequently, the amount of waste plaster boards being discharged from construction sites is increasing every year because either new buildings are built or old buildings are dismantled. The total annual amount of waste plaster boards discarded in 2013 is expected to be about 2 million tonnes. For this reason, the development of recycling and reusing technologies for waste plaster boards discarded from construction sites is an urgent issue. This paper reports on the results of research conducted for the development of soil improvement materials using recycled bassanite.