“…Although gypsum waste has been recognized as hazardous waste but the gypsum material has also been approved to have a good building material due to its lightweight, excellent moldability, fire resistance, and sound absorption [7]. Gypsum materials have large uses in material building such as dry wallboards [8], clay brick [9] and fire clay brick [10]. According to Lushnikova and Dvorkin (2016) gypsum materials also have large uses in building materials such as autoclaved cement cellular concrete, non-autoclaved cement cellular concrete, claydite cement concrete, hollow limesand brick, hollow clay brick, ordinary clay brick, cellular gypsum blocks, gypsum concrete blocks (hollow) and gypsum concrete blocks (solid) [11].…”