Performance and Preparation of Porous Materials Using FGD Gypsum as Aggregate
Porous material with raised flexural strength 34.43 MPa and porosity 33.069% obtained at 1070 °C for 0.5 h, shows that its bulk density of the materials decreases down to 1.450 g/cm3 using FGD gypsum as aggregate. The closed porosity and dense structure of sample has been observed by SEM and the main crystalline phases of the sample using XRD techniques are quartz, mullite and anorthite. The calcium oxide from FGD gypsum decomposition helps to form the crystalline phase of anorthite and to improve the flexural strength of sample.
Hetao Hou and Li Tian
C. Qian et al., "Performance and Preparation of Porous Materials Using FGD Gypsum as Aggregate", Applied Mechanics and Materials, Vols. 357-360, pp. 994-997, 2013