Gypsum blocks produced from TiO2 production by-products.
Calcined titanium gypsum was investigated by the ways of XRD (powder X-ray diffraction), XRF (X-ray fluorescence) and TG-DTA (thermogravimetric-differential thermal analyses). It was employed as raw material for making lightweight materials. The influence of cement, amount of water/solid (W/S) ratio, water-reducing agent, citric acid content and the hydration age on the gypsum blocks was investigated. The results showed that the optimum W/S ratio, cement content and water-reducing agent are 0.9, 10% and 2 wt% for the calcined gypsum from titanium gypsum, respectively. The 5.96 MPa was attained after 7 days of ageing. It was also found that the citric acid is inappropriate to be used in the production of gypsum blocks from TiO2 production by-products.
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.|b Department of Physics & Materials Science , City University of Hong Kong , Kowloon , People's Republic of China.
Yihe
Y
Zhang
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.
Fan
F
Wang
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.
Hongwei
H
Huang
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.
Yuxi
Y
Guo
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.
Baoying
B
Li
a Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology , China University of Geosciences , Beijing , 100083 People's Republic of China.
Yangyang
Y
Liu
b Department of Physics & Materials Science , City University of Hong Kong , Kowloon , People's Republic of China.
Paul K
PK
Chu
D002118:Calcium / Q000737:chemistry; D002133:Calcium Sulfate / Q000737:chemistry*; D003252:Construction Materials / Q000032:analysis; D004055:Differential Thermal Analysis; D007220:Industrial Waste / Q000032:analysis; D033362:Powder Diffraction; D059027:Recycling / Q000379:methods; D013052:Spectrometry, X-Ray Emission; D013818:Thermogravimetry; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
D007220:Industrial Waste; C009495:titanium dioxide; D014025:Titanium; D002118:Calcium; D002133:Calcium Sulfate
Titanium gypsum; building materials; gypsum blocks; industrial wastes; recycling